Pediatric health assessments of young children in child welfare by placement type

Objectives

To describe health-related problems across placement types (unrelated foster, kin foster, in-home with birth parent); to examine the association of placement and demographic/child welfare variables (child gender, age, race/ethnicity; caregiver language; type of maltreatment, and length of time receiving services from child welfare) with health-related problems.

Methods

This study utilized a retrospective medical chart review of children less than 6 years old (n = 449) seen at an outpatient child welfare pediatric clinic. Logistic regression modeling was used to estimate odds of having a weight, medical, or provisional developmental delay problem by placement and demographic/child welfare characteristics.

Results

Almost 13% of children in the sample were obese (≥95% age-gender specific percentile) and more than a quarter were overweight/obese (≥85%) while only 7% were underweight (≤5%). Most children (78%) had a physical health diagnosis and 25% were provisionally identified with a developmental delay. No differences between weight diagnoses, type of medical diagnoses, and provisional developmental delay by placement type were found, although children with 3 or more medical diagnoses were more likely to be with kin (p < .05). Children 2 years old or older were more likely to be overweight/obese than children under 2 years old (p < .05) and Hispanic children were more likely to be overweight/obese than non-Hispanic children (p < .01). Length of stay in child welfare was positively related with a medical diagnosis or provisional developmental delay (p < .01).

Conclusions

Results argue for careful assessment of weight, medical, and developmental problems in children active to child welfare, whether residing in their home of origin, with kin, or with unrelated foster parents. The increasing problem of obesity among young children in child welfare warrants further investigation and intervention.

Practice implications

The comprehensive health examination and enhanced health maintenance schedule for children in foster care should be extended to children who remain at home with child welfare services as child welfare involvement rather than placement is related to health-related problems.     

Investigating geographic variation in use of psychotropic medications among youth in child welfare

Objectives

Public Law (P.L.) 110-351, the “Fostering Connections to Success Act,” calls for state child welfare agencies to partner with Medicaid and pediatric experts to provide planning and oversight regarding the provision of health and mental health services, including medication, to children in state custody. Recent reports, media cases, and class action lawsuits suggest over-use of psychotropic medications to address the behavioral needs of children in the child welfare system. We examined geographic variability in psychotropic medication use across US child welfare agency catchment areas to determine how rates of psychotropic medication use vary in relation to child, community, child welfare, and health system-level factors.

Methods

Cross-sectional analysis of Wave 1 data for the 92 child welfare catchment areas participating in the National Survey of Child and Adolescent Well-being, a random probability sample of 2,504 children ages 2-15 years undergoing investigation for abuse and neglect. We employed multilevel regression modeling to examine the impact of catchment-level variables on medication use, controlling for child-level variables.

Results

Fifteen percent of children reported taking psychotropic medications. Rates of medication use across catchment areas ranged widely from 0 to 40%, a 40-fold difference. On multi-level logistic regression modeling, older age (p < .001), male gender (p < .001), emotional and behavioral problems (p < .001), and insurance (p = .05) were associated with psychotropic medication use at the child-level. At the catchment-level, stressful environment within the child welfare system was negatively associated with medication use. No other catchment-level variables examined were found to explain use.

Conclusions

Striking disparities in medication use exist across catchment areas in this national sample. Of the catchment variables examined, only stressful environment was related to medication use.

Practice implications

These findings highlight significant geographic variation in medication use that most likely reflect both under-use and over-reliance on psychotropic medication. The link between child welfare environment and medication use suggests the influence of systemic, as opposed to clinical, causes of variation in medication use. This requires greater implementation of organizational processes governing quality of care for this highly vulnerable population.     

The relationship between time spent living with kin and adolescent functioning in youth with a history of out-of-home placement

Objective

Many children in the US who are court-ordered to live in out-of-home care are placed with kinship caregivers. Few studies have examined the impact of living with kin on child well-being. This study examined the relationship between length of time living with kin and indices of adolescent well-being in a cohort of children who were initially court-ordered into out-of-home care.

Methods

Prospective cohort design with 148 youth, ages 7-12, who entered out-of-home care between May, 1990, and October, 1991. Seventy-five percent of those interviewed at T1 (6 months following placement) were interviewed at T2 (5 years later).

Results

Bivariate analyses did not demonstrate significant relationships between length of time living with kin and the outcome variables. In multivariate analyses, longer length of time living with kin was related to: (1) greater involvement in risk behaviors including: delinquency (β = .22, p < .05), sexual risk behaviors (β = .31, p < .05), substance use (β = .26, p < .05), and total risk behaviors (β = .27, p < .05), and (2) poorer life-course outcomes including: Tickets/Arrests (OR = 1.4, p < .05) and lower grades (β = −.24, p < .05). Time living with kin was not related to total competence, or self-destructive, internalizing, externalizing, or total behavior problems. There were trends (p < .10) for time living with kin to predict greater trauma symptomatology (β = .17) and suspensions (OR = 1.1).

Conclusions

There were no significant bivariate findings. The multivariate findings suggested a pattern of poorer functioning for youth who spent more time living with kin. No differences were found in current symptomatology.

Practice implications

Although findings from a single study should not dictate changes in practice or policy, the current study's findings do suggest that the field needs to conduct more methodologically sophisticated research on the impact of kinship care.     

Identifying children at high risk for a child maltreatment report

Objective

To help professionals identify factors that place families at risk for future child maltreatment, to facilitate necessary services and to potentially help prevent abuse and neglect.

Method

The data are from a prospective, longitudinal study of 332 low-income families recruited from urban pediatric primary care clinics, followed for over 10 years, until the children were approximately 12 years old. Children with prior child protective services involvement (CPS) were excluded. The initial assessment included sociodemographic, child, parent and family level variables. Child maltreatment was assessed via CPS reports. Risk ratios (RRs) and their 95% confidence intervals (CIs) were estimated using Cox regression models.

Results

Of the 224 children without a prior CPS report and with complete data who were followed for an average of 10 years, 97 (43%) later had a CPS report. In a multivariate survival analysis, 5 risk factors predicted CPS reports: child's low performance on a standardized developmental assessment (RR = 1.23, 95% CI = 1.01-1.49, p = .04), maternal education ≤ high school (RR = 1.55, CI = 1.01-2.38, p = .04), maternal drug use (RR = 1.71, CI = 1.01-2.90, p < .05), maternal depressive symptoms (RR per one standard deviation higher score = 1.28, CI = 1.09-1.51, p < .01), and more children in the family (RR per additional child = 1.26, CI = 1.07-1.47, p < .01).

Conclusions

Five risk factors were associated with an increased risk for later maltreatment. Child health care and other professionals can identify these risk factors and facilitate necessary services to strengthen families, support parents and potentially help prevent child maltreatment.     

Maternal mental illness and the safety and stability of maltreated children

Objective

Children of mothers with mental illness are at risk for multiple untoward outcomes, including child maltreatment and foster care placement. The purpose of this analysis was to determine the association between maternal mental illness and children's long term safety and stability.

Methods

A multi-sector administrative dataset from the Department of Social Services (DSS) and Department of Mental Health (DMH) was analyzed. The sample was 4,895 low income families (mother and child dyads) first reported to child welfare in 1993 or 1994. Families were followed until March of 2009. Dates of new report and foster care placement were obtained from DSS data. ICD-09 or ICD-10 diagnostic codes were obtained from Department of Mental Health data. Schizophrenic disorders, episodic mood disorders, anxiety disorders and personality disorders were examined.

Results

New reports were more likely for children of mothers with mental illness, regardless of diagnosis. While overall 67% of children had a new report over the course of their childhood, rates ranged from 80 to 90% for children of mothers with mental illness and occurred within a shorter time frame than for other children. In the multivariate models, mood (HR = 1.41, p < .001) and anxiety disorders (HR = 1.32, p < .05) placed children at greater risk for new reports. The proportion of children with foster placements was more than double for children of mothers with mental illness than for other children. In the multivariate model, anxiety disorders were strongly associated with the risk of placement (HR = 1.75, p < .001).

Conclusions and Practice implications

Important differences in safety and stability were found between children of mothers with and without mental illnesses, as well as some variability across diagnoses. Since these mothers had already received services our findings suggest that access is not enough. The services they are receiving or have received may be an ineffective approach to helping them parent safely.     

Child sexual abuse and its relationship with health risk behaviors among rural children and adolescents in Hunan, China

Objective

The current study was designed to explore the prevalence of child sexual abuse (CSA) and its association with health risk behaviors (i.e., smoking, alcohol use, binge drinking, suicidal ideation, and suicide attempt) among rural children and adolescents in China.

Methods

A sample of 683 rural children and adolescents (8 to 18 years of age) completed an anonymous questionnaire which assessed experiences of CSA and 5 health risk behaviors. Data on several potential confounding factors were also collected.

Results

A total of 123 (18%) respondents reported experiencing at least 1 kind of CSA before 16 years of age, with more boys reporting CSA than girls (21.5% vs. 14.2%). In addition, attending non-boarding schools, lower levels of self-esteem, and higher levels of perceived peer pressure for engagement in health risk behaviors were associated with higher rates of CSA. Multivariate logistic regression analyses revealed that CSA experience was significantly associated with cigarette smoking (aOR = 2.14), binge drinking (aOR = 2.68), suicidal ideation (aOR = 1.69), and suicide attempt (aOR = 2.69) after controlling for several demographic and psychological factors.

Conclusion

More attention should be paid to the issues of CSA among rural children and adolescents in China. Effective CSA prevention intervention needs to address the vulnerabilities of the population, increase children's and parents’ awareness of CSA and ability of self-protection.     

The relation between abuse and violent delinquency: the conversion of shame to blame in juvenile offenders

Objective

While the relationship between abusive parenting and violent delinquency has been well established, the cognitive and emotional processes by which this occurs remain relatively unidentified. The objective of this work is to apply a conceptual model linking abusive parenting to the conversion of shame into blaming others and therefore to violent delinquency.

Methods

A retrospective study of 112 adolescents (90 male; 22 female; ages 12-19 years; M = 15.6; SD = 1.4) who were incarcerated in a juvenile detention facility pending criminal charges, completed measures of exposure to abusive and nonabusive discipline, expressed and converted shame, and violent delinquency.

Results

Findings tend to confirm the conceptual model. Subjects who converted shame (i.e., low expressed shame, high blaming others) tended to have more exposure to abusive parenting and showed more violent delinquent behavior than their peers who showed expressed shame. Subjects who showed expressed shame (i.e., high expressed shame, low blaming others) showed less violent delinquency than those who showed converted shame.

Conclusions

Abusive parenting impacts delinquency directly and indirectly through the effects of shame that is converted. Abusive parenting leads to the conversion of shame to blaming others, which in turn leads to violent delinquent behavior.

Practice implications

For juvenile offenders, the conversion of shame into blaming others appears to contribute to pathological outcomes in relation to trauma. Translation of this work into clinical practice is recommended.     

The impact of adverse childhood experiences on an urban pediatric population

Objective

The goal of this study was to investigate the adverse childhood experiences (ACEs) in youth in a low-income, urban community.

Study design

Data from a retrospective chart review of 701 subjects from the Bayview Child Health Center in San Francisco are presented. Medical chart documentation of ACEs as defined in previous studies were coded and each ACE criterion endorsed by a traumatic event received a score of 1 (range = 0-9). This study reports on the prevalence of various ACE categories in this population, as well as the association between ACE score and two pediatric problems: learning/behavior problems and body mass index (BMI) ≥ 85% (i.e., overweight or obese).

Results

The majority of subjects (67.2%, N = 471) had experienced 1 or more categories of adverse childhood experiences (ACE ≥ 1) and 12.0% (N = 84) had experienced 4 or more ACEs (ACE ≥ 4). Increased ACE scores correlated with increased risk of learning/behavior problems and obesity.

Conclusions

There was a significant prevalence of endorsed ACE categories in this urban population. Exposure to 4 or greater ACE categories was associated with increased risk for learning/behavior problems, as well as obesity.

Practice implications

Results from this study demonstrate the need both for screening of ACEs among youth in urban areas and for developing effective primary prevention and intervention models.     

The validity and utility of the California Family Risk Assessment under practice conditions in the field: A prospective study

Objective

Analysis of the validity and implementation of a child maltreatment actuarial risk assessment model, the California Family Risk Assessment (CFRA).

Questions addressed

(1) Is there evidence of the validity of the CFRA under field operating conditions? (2) Do actuarial risk assessment results influence child welfare workers’ service delivery decisions? (3) How frequently are CFRA risk scores overridden by child welfare workers? (4) Is there any difference in the predictive validity of CFRA risk assessments and clinical risk assessments by child welfare workers?

Method

The study analyzes 7,685 child abuse/neglect reports originating in 5 California counties followed prospectively for 2 years to identify further substantiated child abuse/neglect. Measures of model calibration and discrimination were used to assess CFRA validity and compare its accuracy with the accuracy of clinical predictions made by child welfare workers. The extent of use of an override feature of the CFRA and child welfare worker reliance on CFRA risk scores for making service decisions were analyzed.

Results

Imperfect but better-than-chance predictive validity was found for the CFRA on a range of measures in a large temporal validation sample (n = 6,543). For 114 cases where both CFRA risk assessments and child welfare worker clinical risk assessments were available, the CFRA exhibited evidence of imperfect but better-than-chance predictive validity, while child welfare worker risk assessments were found to be invalid. Child welfare workers overrode CFRA risk assessments in only 114 (1.5%) of 7,685 cases and provided in-home services in statistically significantly larger proportions of higher- versus lower-risk cases, consistent with heavy reliance on the CFRA.

Conclusions/practice implications

Until research identifies actuarial models exhibiting superior predictive validity when applied in every-day practice, the CFRA is, and will be a valuable tool for assessing risk in order to make in-home service-provision decisions.     

Caregiver perceptions of sexual abuse and its effect on management after a disclosure

Objective

The aim of the study was to examine caregiver management strategies for child sexual abuse (CSA) when presented with hypothetical scenarios that vary in physical invasiveness.

Methods

One hundred fifty three caregivers were given 3 scenarios of CSA with 7 management strategies presented in the 21-item Taking Action Strategies (TAS) scale. Caregivers were asked to rate strategies according to their willingness to carry out each action with rating of 5 = greater likelihood of carrying out the action specified while a rating of 1 = a lower likelihood of carrying out that action. CSA scenarios included exposure to pornography/masturbation, fondling, and penetration while management strategies including fighting the accused, blaming the child, and outreaching to the authorities. Repeated measures ANOVA was used to compare mean TAS scores for the management strategies across CSA scenarios.

Results

The difference between TAS scores across the abuse scenarios was statistically significant (p < .001). Mean TAS scores reflected greater preference for taking action if the abusive act was perceived as more physically intrusive (exposure to pornography/masturbation-TAS 3.5, fondling-TAS 3.7, penetration-TAS 3.8). Caregivers reported being less willing to handle a disclosure of CSA without outreach (TAS 2.5 and 2.0 for fighting and blaming the child, respectively) and more willing to manage a disclosure with outreach to authorities (TAS 3.8, 4.5, and 4.7 for outreaching to Child Protective Services [CPS], to the child's healthcare provider and police, respectively). A predictor of caregiver outreach to authorities identified was the caregiver having past interactions with CPS.

Conclusion

Perception of the physical invasiveness of CSA and demographic factors can impact caregiver management strategies after a disclosure.

Practice implications

Results suggest that several factors influence caregiver management of sexual abuse. These factors warrant further study, as they are potential contributors to declining trends in CSA cases observed. Other implications include the need for educational efforts targeting caregivers. These interventions should focus on dispelling myths about the perceived physical invasiveness of CSA. These perceptions should not mitigate a caregiver's decision to involve the authorities in their management after a disclosure. Lastly, despite criticisms of the child protective systems, caregivers with past encounters with CPS view these related agencies as valuable resources.     

Intrafamilial conflict and emotional well-being: a population based study among Icelandic adolescents

Objectives

During intrafamilial conflicts children are often innocent bystanders, caught in the crossfire. In such situations, they are at increased risk to become directly involved in abusive verbal behavior of the perpetrator, and exposed to being shouted or yelled at, threatened, rejected and even physically abused. The present study has two main objectives: (1) ascertain a national base rate of intrafamilial conflicts and physical violence at home among Icelandic adolescents; and (2) to investigate the association of witnessing and/or having been a part of intrafamilial conflict or physical violence at home with variables that relate to mental health and well-being.

Methods

The participants were 3,515 students, 14- and 15-year-old, in the national compulsory school system in Iceland. As a part of the 2003 ESPAD survey, each pupil was asked about experiences of severe verbal arguments and physical violence at home as well as their background, behaviors, and mental health assessed with the use of tested measurement scales such as the Symptom Distress Checklist 90 (SCL-90) and the Rosenberg Self-Esteem Scale.

Results

About 22% of the participants stated that they had witnessed a severe verbal argument between parents and 34% stated that they had been involved in a severe verbal argument with parents. This rate was slightly higher for girls compared to boys. All together 7% of adolescents had witnessed physical violence at home where an adult was involved and 6% of the participants stated that they had experiences of being involved in physical violence at home where an adult was involved. Witnessing or being involved in severe verbal arguments at home and/or witnessing or being involved in physical violence with an adult was significantly associated with greater levels of depression, anger, and anxiety, and negatively related with self-esteem (p < 0.01).

Conclusions

Many adolescents in Iceland witness severe parental verbal arguments or physical violence between adults in their homes and some are directly involved in such acts. It affects their long-term emotional and behavioral development and well-being.

Practice implications

Preventive measures have to be implemented at an early age and should include, but not be limited to, information on disciplining and upbringing of children and the negative impact of intrafamilial conflicts on the long-term health of their children. Due attention should be given to the health and well-being of children where such violence is known to occur.     

Changes in the prevalence of child sexual abuse, its risk factors, and their associations as a function of age cohort in a Finnish population sample

Objective

We examined (1) the prevalence of childhood sexual abuse (CSA) experiences as a function of cohort and gender, (2) the prevalence of factors associated with CSA as a function of cohort and whether the association of these factors with CSA remained the same irrespective of cohort, and (3) whether any cohort differences could be explainable by cohort differences in reporting bias.

Method

We used the responses of 4,561 men (M = 29, SD = 7 years) and 8,361 female (M = 29, SD = 7 years) Finnish participants who responded to the Childhood Trauma Questionnaire-Short Form as well as questions regarding family structure.

Results

The prevalence of CSA experiences varied between 0.7-4.6% for men and 1.8-7.5% for women depending on the item. Younger cohorts reported less CSA as well as less of the risk factors (physical neglect and abuse, emotional neglect and abuse, parental substances abuse, not growing up with both biological parents) that were positively associated with the likelihood of CSA. The effects of these risk factors did not vary as a function of the cohort. Also, the declining trend was not explainable by social desirability being higher in the younger cohorts.

Conclusions

The results suggest that there is a real decline in the prevalence of CSA and it is associated with a simultaneous decline in factors associated with CSA.     

Emotion recognition in fathers and mothers at high-risk for child physical abuse

Objective

The present study was designed to determine whether parents at high risk for physical child abuse, in comparison with parents at low risk, show deficits in emotion recognition, as well as to examine the moderator effect of gender and stress on the relationship between risk for physical child abuse and emotion recognition.

Methods

Based on their scores on the Abuse Scale of the CAP Inventory (Milner, 1986), 64 parents at high risk (24 fathers and 40 mothers) and 80 parents at low risk (40 fathers and 40 mothers) for physical child abuse were selected. The Subtle Expression Training Tool/Micro Expression Training Tool ( [Ekman, 2004a] and [Ekman, 2004b]) and the Diagnostic Analysis of Nonverbal Accuracy II (Nowicki & Carton, 1993) were used to assess emotion recognition.

Results

As expected, parents at high risk, in contrast to parents at low risk, showed deficits in emotion recognition. However, differences between high- and low-risk participants were observed only for fathers, but not for mothers. Whereas fathers at high risk for physical child abuse made more errors than mothers at high risk, no differences between mothers at low risk and fathers at low risk were found. No interaction between stress, gender, and risk status was observed for errors in emotion recognition.

Conclusions and practice implications

The present findings, if confirmed with physical abusers, could be helpful to further our understanding of deficits in processing information of physically abusive parents and to develop treatment strategies specifically focused on emotion recognition. Moreover, if gender differences can be confirmed, the findings could be helpful to develop specific treatment programs for abusive fathers.     

Children's participation in foster care hearings

Purpose

Empirical research regarding potential risks and benefits of children's participation in the legal system generally, and in the child dependency legal system in particular, is sparse and mostly characterized by small studies without comparison groups. The current study was designed to address the following questions regarding children's participation in dependency court hearings: (1) Is attending court harmful to children? (2) Is attending court beneficial to children? (3) Is judicial behavior with the child in the courtroom related to potential harms or benefits? and (4) Are there age differences in children's reactions?

Method

The authors measured children's reactions to attending dependency review hearings (n = 43) and compared them to a sample of children who did not attend their hearings (n = 50). One to 2 weeks following review hearings, both groups of children were interviewed about their reactions to the court process.

Results

Children who attended their hearings reported more positive feelings about the dependency process (e.g., trust in judge, perceived fairness, and more comfort with their guardians ad litem and caseworkers). For children who attended, there was no evidence of high distress immediately preceding or following their hearings. Court observations revealed that more active engagement by judges was related to positive responses from the children. Most children, including both children who attended hearings and those who did not, believed that all children should be able to attend their hearings.

Conclusion

Overall, the findings suggest that policies encouraging children's attendance at dependency hearings are viewed positively by and not harmful to children.     

Malicious use of nonpharmaceuticals in children

Objective

The objective of this study was to describe malicious nonpharmaceutical exposures in children reported to US poison centers.

Methods

We performed a retrospective study of all nonpharmaceutical exposures involving children 7 years old reported to the US National Poison Data System (NPDS) from 2000 to 2008 for which the reason for exposure was coded as “malicious”. The American Association of Poison Control Centers definition and categorization of nonpharmaceuticals was used. Data collected for each case included age, gender, month and year of the exposure, the exposed substance or substances, intent, and poison center outcome designation. Fatality abstracts (summaries of the facts reported to the poison center) were reviewed.

Results

Out of approximately 21.4 million exposures reported to NPDS during the study period, 4,053 cases involving 4,232 nonpharmaceuticals were identified. The mean number of cases per year was 450 (range 409-546) with no linear annual trend (p = 0.28). The median age was 3 years (1.5, 5) with boys constituting 57%. 4.5% of the cases resulted in moderate or worse outcomes in which the outcome was known. The most commonly reported major categories were household cleaning substances (23%), cosmetics/personal care products (13%), pesticides (8%), other/unknown nondrug substances (6%), foreign bodies/toys/miscellaneous (5%), alcohols (5%), hydrocarbons (4%), lacrimators (4%), chemicals (4%), and deodorizers (3%). Four children died and 18 others had lifethreatening injuries. Among these 22 children, cleaning substances (7) were the most common major category followed by chemicals (4), alcohols (3), fumes/gases/vapors (2) and six other categories with 1 each. In the only case where the presence or absence of associated physical injuries was described, the child had multiple injuries consistent with physical abuse.

Conclusion

Malicious administration of nonpharmaceuticals is an important component of child maltreatment with cases being reported consistently to poison centers.

Practical implications

Clinicians should consider the possibility of child abuse when presented with these exposures.     

Implicit attitudes toward children may be unrelated to child abuse risk

Objective

To explore whether adults possess implicit attitudes toward children and whether those attitudes are especially negative among respondents who are high in child physical abuse (CPA) risk.

Methods

The present study used an implicit evaluative priming procedure. In this procedure, participants were instructed to make decisions about the evaluative implications of target words. These words were preceded by photographs of child faces or adult faces displaying positive, neutral, or negative expressions. Reaction times for the evaluative decisions were used as an index of the extent to which photos invoked negative or positive evaluative reactions.

Results

Results from 2 studies, the first conducted on a student sample (N = 90) and the second on a parent sample (N = 95), demonstrated that evaluative congruence between the facial expressions displayed in photographs and the target words facilitated responses. Furthermore, the results suggested that regardless of CPA risk, child faces, relative to adult faces, facilitated responses to negative target words, suggesting an out-group bias. This implicit out-group bias was not moderated by respondents’ CPA risk status.

Conclusions

Faces of children, relative to faces of adults, appear to activate negative information structures that facilitate evaluative decisions of negative stimuli, suggesting an out-group bias. Given that out-group biases typically lead to less favorable treatment of out-group members, additional research is needed to examine the pervasiveness of negative evaluative biases towards children and the potential implications of such biases on children's lives. Further, research examining whether high CPA risk parents and low CPA risk parents differ in how they manage initial negative evaluative reactions is needed.     

Long-term comparison of full-bed deep anterior lamellar keratoplasty and penetrating keratoplasty in treating keratoconus

Objective

To compare postoperative outcomes of full-bed deep anterior lamellar keratoplasty (DALK) with penetrating keratoplasty (PK) in treating keratoconus.

Methods

Seventy-five eyes of 64 patients who received full-bed DALK and 52 eyes of 51 patients who received PK between June 2000 and August 2010 were included in this retrospective study. Full-bed DALK was performed using Yao’s hooking-detaching technique. PK was performed using a standard technique. Intraoperative and postoperative complications, visual acuity, rejection, graft survival, endothelial cell density, corneal sensation recovery, and re-innervation were compared between the two groups.

Results

A best correct visual acuity of 0.5 or better was achieved in 90.7% of eyes after full-bed DALK and in 92.3% of eyes after PK (P=0.75). By the fifth postoperative year, graft endothelial cell loss reached 34.6% in the PK group vs. 13.9% in the full-bed DALK group (P<0.001). There were no statistical differences in corneal sensitivity recovery or corneal re-innervation between the groups (P>0.05). Intraoperative microperforation occurred in seven out of 75 (9.3%) eyes with a temporally postoperative double anterior chamber in two eyes in the full-bed DALK group. Postoperative complications in the PK vs. the full-bed DALK groups respectively were: rejection (7.7% vs. 0%, P=0.015), high intraocular pressure (IOP) (46.2% vs. 1.3%, P<0.001), secondary glaucoma (9.6% vs. 0%, P=0.006), complicated cataract (19.2% vs. 0%, P<0.001), and wound dehiscence (9.6% vs. 0%, P=0.006).

Conclusions

Both full-bed DALK and PK can offer long-term satisfactory visual outcomes for keratoconus. Graft rejection, secondary glaucoma, complicated cataracts, and constant endothelial cell loss were observed in eyes only after PK.