Giving voice to the child perspective: psychometrics and relative precision findings for the Child Health Questionnaire self-report short form (CHQ-CF45).

PURPOSE: To derive and evaluate a shorter self-report Child Health Questionnaire (CHQ) legacy measure for use in research and clinical trials/care. METHODS: Stepwise regression, factor analysis, and item scaling principles were used to derive and guide item selection, using data from a large general sample in the Netherlands (n = 933). Feasibility was assessed in a school sample (n = 114) and item internal consistency, discriminant validity, floor, and ceiling effects were evaluated using an external larger validation sample in the US (n = 1468). Reliabilities were estimated using Cronbach's alpha. Relative precision (RP), the ability to distinguish between clinical subgroups, was computed by comparing the proportion of variance explained by the short-form scales vs. respective full-length scales. RESULTS: The CHQ-CF was reduced from 87 to 45 items. The median alpha coefficient was 0.89. Ninety-seven to 100% scaling successes for item discriminant validity were observed. Floor effects were not observed; some ceiling effects were detected. RP estimates ranged from 0.73 to 1.37. CONCLUSION: The CHQ-SF45 is reliable and valid and exceeds item level scaling criteria.

Feasibility and Psychometric Properties of the Infant Toddler Quality of Life (ITQOL) Questionnaire in a Community-Based Sample of Healthy Infants in China.

Objective Evaluate the feasibility and psychometric properties of the Infant Toddler Quality of Life (ITQOL) questionnaire as a measure of health-related quality of life (HRQOL) in a sample of Chinese infants. Methods The linguistically validated Simplified Chinese version of the ITQOL was used in a multicenter, observational study of healthy, term infants (N = 427), age 6 weeks at enrollment, in China. At Days 1 and 48, parents/guardians completed the ITQOL, the Short Form Health Survey (SF-12v2) and the Infant Gastrointestinal Symptom Questionnaire (IGSQ). ITQOL feasibility, reliability, ceiling/floor effects, concurrent validity and discriminatory validity were evaluated. Results Feasibility of administering the ITQOL was supported by strong response rates (> 97%) with < 1% missing items for all scales except physical abilities. Reliability was acceptable (Cronbach's alpha > 0.70) for all scales except Day 1 General Health (0.67). Floor effects were minimal (< 2%), except Day 1 physical abilities (7%). Ceiling effects increased from Days 1 to 48 across all scales. Concurrent validity was demonstrated by correlations between ITQOL infant-focused scales and IGSQ score (r = -0.20 to - 0.34, p < 0.001) and between parent-focused scales and SF-12v2 mental health composite (MCS) scores (r = 0.29-0.46, p < 0.001). ITQOL scales discriminated between infant subgroups based on illness-related outcomes (sick visits, adverse events) and between parent subgroups based on SF-12v2 MCS scores. Conclusion The Simplified Chinese version of the ITQOL performed well in a community-based sample of Chinese infants, with evidence supporting the instrument's feasibility, reliability, and validity. These data support the ITQOL as a valuable tool to assess HRQOL in Chinese infants.

Children's family experiences: development of the PROMIS® pediatric family relationships measures.

PURPOSE: To describe the development of pediatric family relationships measures, with versions for child self-report (8-17 years) and parent-report for children 5-17 years old. Measures were created for integration into the Patient Reported Outcomes Measurement Information System (PROMIS®). METHODS: Semi-structured interviews with 10 experts, 24 children, and 8 parents were conducted to elicit and clarify essential elements of family relationships. A systematic literature review was conducted to identify item concepts representative of each element. The concepts were transformed into items that were iteratively revised based on cognitive interviews (n = 43 children) and item translatability review. Psychometric studies involving 2846 children and 2262 parents were conducted to further refine and validate the instruments. RESULTS: Qualitative procedures supported the development of content valid Family Relationships item banks. Final child- and parent-report item banks each contain 47 items. Unidimensional item banks were calibrated using IRT-modeling to estimate item parameters representative of the US population and to enable computerized adaptive test administration. Four- and eight-item short forms were constructed for standard fixed format administration. All instruments have strong internal consistency, retest-reliability, and provide precise estimates of various levels of family relationship quality. Preliminary evidence of the instruments' validity was provided by known-group comparisons and convergence with legacy measures. CONCLUSION: The PROMIS pediatric Family Relationships measures can be applied in research focused on determinants, outcomes, and the protective effects of children's subjective family relationship experiences.

Filum Section for Urinary Incontinence in Children with Occult Tethered Cord Syndrome: A Randomized, Controlled Pilot Study.

PURPOSE: Occult tethered cord syndrome, in which there is normal neuroanatomic imaging despite clinical and urodynamic evidence of neuropathic bladder behavior, is controversial. Several uncontrolled series describe improvement in bladder function following section of the filum terminale. We performed a pilot randomized, controlled study comparing medical treatment to surgical section of the filum plus medical treatment in children with occult tethered cord syndrome. MATERIALS AND METHODS: Children refractory to standard medical management for 1 year or more with normal conus position on magnetic resonance imaging and abnormal urodynamics were randomized. Exclusion criteria included any neurological conditions, spinal dysraphism, bladder outlet obstruction and an atonic bladder. Patients were assessed at randomization and 1 year later with a standardized urodynamic score, the validated PEMQOL (Pediatric Enuresis Module on Quality of Life™) scale, and a validated bowel and bladder dysfunction score. RESULTS: After 8 years we accrued 21 patients. The bowel and bladder dysfunction score improved in the surgical and medical arms (20% and 24%) and the urodynamic score improved slightly (6% and 4%, respectively). The PEMQOL Child and Family Impact Scales improved modestly in both groups. All differences were nonsignificant. Interim analysis indicated that more than 700 patients in each arm would be required to demonstrate a statistical difference with respect to urodynamic score based on our preliminary data. CONCLUSIONS: There appears to be no objective difference in urological outcome between medical management plus or minus filum section for patients with occult tethered cord syndrome. These data challenge the existence of the concept of occult tethered cord syndrome, in which bowel and bladder dysfunction score is attributed to tethering by the filum despite a normally located conus.

The impact of preschool wheezing patterns on health-related quality of life at age 4 years.

We assessed whether dynamic preschool wheezing patterns affect health-related quality of life (HRQOL) at age 4 years. The study included 3878 children participating a prospective cohort study. Information on preschool wheezing was obtained by questionnaire and children were categorised into: never, early, late and persistent wheezing. At age 4 years HRQOL was measured using the Child Health Questionnaire (CHQ). Persistent wheezing was associated with reduced scores for nine out of 13 CHQ scales. No differences in psychosocial CHQ scores (p>0.05), but lower physical CHQ scores were found in children with late and persistent wheezing, compared to children who never wheezed (p<0.001). Mean scores on general health perceptions were, respectively, eight and 12 points lower (on a 0-100 scale) in children with late and persistent wheezing (p<0.001), and children with one to three episodes and four or more episodes of wheezing in the fourth year respectively scored seven and 24 points lower (p<0.001), compared to children who never wheezed. Persistent wheezing during preschool age independently affects a child's HRQOL, particularly general health perceptions and physical domains at age 4 years. HRQOL was more affected by frequent wheezing episodes in the fourth year of life, rather than by the duration of wheezing at age 0-4 years.

Factor structure of the Child Health Questionnaire Parent Form-50 and predictors of health-related quality of life in children with epilepsy.

PURPOSE: The present study investigated the higher-order summary factor structure of the Child Health Questionnaire Parent Form-50 (CHQ) in a sample of children with new-onset epilepsy. The secondary aim was to identify risk factors predicting health-related quality of life (HRQL) 24 months post-diagnosis. METHODS: Data came from the Health-related Quality of Life in Children with Epilepsy Study (HERQULES, N = 374), a multi-site study documenting HRQL among children with epilepsy from diagnosis through 24 months. Confirmatory factor analysis was used to determine goodness of fit between the original structure of the CHQ and HERQULES data. Multiple regression was used to identify risk factors at diagnosis for HRQL at 24 months. RESULTS: The models demonstrated good fit: baseline: CFI = 0.945; TLI = 0.941; WRMR = 1.461; RMSEA = 0.058; 24 months: CFI = 0.957; TLI = 0.954; WRMR = 1.393; RMSEA = 0.055. Factor loadings were high and no cross-loadings observed (first order: λ = 0.27-0.99, 0.24-0.98; second order: λ = 0.69-0.86, 0.54-0.92; p < 0.001 for all). Controlling for HRQL at diagnosis, predictors for better 24-month HRQL were as follows: physical health: fewer cognitive problems (p = 0.023) and parents with fewer depressive symptoms (p = 0.049); psychosocial health: older parent age (p = 0.043), fewer behavior problems (p = 0.004), and families with better functioning (p = 0.008) and fewer demands (p = 0.009). CONCLUSIONS: The CHQ higher-order summary factor structure was replicated in a sample of children with new-onset epilepsy, and child and family risk factors at diagnosis were found to predict HRQL 24 months post-diagnosis. These findings suggest it is possible to identify at-risk children early in the illness process and provide impetus for adopting family-centered care practices.

Impaired parent-reported health-related quality of life of underweight and obese children at elementary school entry.

PURPOSE: Examine the health-related quality of life of 5-6-year-old underweight, overweight and obese children. METHODS: Our cross-sectional study included 3,227 parent-child dyads from the "Be active, eat right" study. Parents completed questionnaires regarding child and parental characteristics. Health-related quality of life of the child was measured using the Child Health Questionnaire Parent Form 28. Children were classified normal weight, overweight, obese, severely obese, and underweight according to the international age and gender BMI cutoff points. Bootstrap analyses were performed for general linear models corrected for potential confounding variables. RESULTS: Severely obese children (ß, -2.60; 95% CI, -4.80 to -0.57, p < 0.01) and underweight children (ß, -1.11; 95% CI, -1.85 to -0.39, p < 0.01) had lower parent-reported scores on the physical summary scale. On the physical functioning profile scale parents of overweight and severely obese children also reported statistically significant lower scores (p < 0.05 and p < 0.01, respectively).There were no significant differences regarding the psychosocial summary scale scores between the different weight categories. CONCLUSION: Underweight and overweight children experience impaired health-related quality of life on the physical functioning domain. Physicians, teachers and parents should be aware of the possible negative impact on health-related quality of life in underweight and overweight 5-6-year-old children.

Parent-reported health outcomes in infants/toddlers: measurement properties and clinical validity of the ITQOL-SF47.

PURPOSE: To derive and evaluate a shorter infant/toddler quality of life questionnaire (ITQOL) for use in clinical care. METHODS: Stepwise regression, factor analysis, and item-scaling principles were used to derive and guide item selection using data from a large general sample in the Netherlands (n = 5,211) and a "wheezing illness" sample (n = 138). Item internal consistency, discriminant validity, and floor and ceiling effects were evaluated using a general Dutch sample (Salland Region n = 410) and two clinical samples: Functional abdominal pain (FAP, n = 81) and Burn (n = 194). Reliabilities were estimated using Cronbach's alpha. Relative precision (RP), the ability to distinguish between clinical subgroups, was computed by comparing the proportion of variance explained by the short-form scales versus respective full-length scales. RESULTS: The ITQOL was reduced from 97 to 47 items. Median alpha coefficients were 0.77 Salland sample, 0.76 (FAP), and 0.84 (Burn). Ninety-one to 100 % scaling successes for item discriminant validity were observed for 21 of 24 tests (8 scales, 3 samples). Floor effects were not observed; some ceiling effects were detected. RP estimates in the Salland sample ranged from 2.40 (physical abilities) to 0.58 (temperament and moods). RP estimates in the FAP sample were 0.85 (bodily pain), 1.36 (temperament and moods) and 1.62 (parental-impact emotional) and for Burn, 1.51 (temperament and moods) and 0.59 (general health perceptions). CONCLUSION: The ITQOL-SF47 is reliable and valid and exceeds item-level scaling criteria.

Health-related quality of life of infants from ethnic minority groups: the Generation R Study.

PURPOSE: To assess whether the health-related quality of life of infants from ethnic minority groups differs from the health-related quality of life of native Dutch infants and to evaluate whether infant health and family characteristics explain the potential differences. METHODS: We included 4,506 infants participating in the Generation R Study, a longitudinal birth cohort. When the child was 12 months, parents completed the Infant Toddler Quality of Life Questionnaire (ITQOL); ITQOL scale scores in each ethnic subgroup were compared with scores in the Dutch reference population. Influence of infant health and family characteristics on ITQOL scale scores were evaluated using multivariate regression models. RESULTS: Infants from ethnic minority groups presented significantly lower ITQOL scale scores compared to the Dutch subgroup (e.g., Temperament and Moods scale: median score of Turkish subgroup, 70.8 (IQR, 15.3); median score of Dutch subgroup, 80.6 (IQR, 13.9; P < 0.001)). Infant health and family characteristics mediated an important part of the association between the ethnic minority status and infant health-related quality of life. However, these factors could not fully explain all the differences in the ITQOL scale scores. CONCLUSIONS: Parent-reported health-related quality of life is lower in infants from ethnic minority groups compared to native Dutch infants, which could partly be explained by infant health and by family characteristics.

Asthma-like symptoms in the first year of life and health-related quality of life at age 12 months: the Generation R study.

PURPOSE: This study compares HRQOL among subgroups of infants with asthma-like symptoms to a subgroup without such symptoms and examines independent associations between asthma-like symptoms during the first year of life and HRQOL at age 12 months. METHODS: Our study sample included 5,000 infants participating in the Generation R study. Their parents completed structured questionnaires to obtain information on asthma-like symptoms, HRQOL, infants', and maternal characteristics. Asthma-like symptoms were defined according to the number of positive answers to 12 items on lower respiratory symptoms. HRQOL was measured using the ITQOL. Higher scores indicated better HRQOL. RESULTS: Infants with asthma-like symptoms had significantly lower HRQOL scores for all ITQOL scales. Among the subgroup with severe symptoms (4% of the infants), relevant deficits in HRQOL were observed for most ITQOL scales, particularly for General Health, Bodily Pain, and Family Activities (effect sizes ≥ 0.8). In multivariate linear models, asthma-like symptoms were independently associated with 6 ITQOL scales. The population attributable risks were especially high for Family Activities, General Health, Parental Emotional, and Parental Time. CONCLUSIONS: Asthma-like symptoms during the first year of life are associated with impaired quality of life at age 12 months. At population level, asthma-like symptoms were associated with lower HRQOL, regardless of symptom severity.

The Generation R study: a candidate gene study and genome-wide association study (GWAS) on health-related quality of life (HRQOL) of mothers and young children.

AIM: The aim of this paper is to describe the Generation R study as a template that enables candidate gene study and genome-wide association study regarding health-related quality of life (HRQOL) of mothers and their young children. METHODS: Generation R is a population-based prospective cohort study from fetal life onwards in Rotterdam, The Netherlands. Children were born in 2002-2006. Blood from mothers and placenta cord blood were sampled. Mothers' HRQOL was measured 5 times during pregnancy and after birth using SF-12 and EQ-5D. Children's HRQOL was measured 5 times between age 1 and 5/6 years using Infant-Toddler Quality Of Life questionnaire (ITQOL), Health Status Classification System PreSchool (HSCS-PS) and Child Health Questionnaire Parent Form 28 items (CHQ-PF28), respectively. RESULTS: DNA is available for 8,055 mothers and 5,908 children. Genotyping of various candidate genes and a genome-wide association (GWA) scan (Illumina 610K) of child DNA were done. A template for gene-HRQOL analyses is provided. We start with candidate gene study on HRQOL of mothers and children. Gene-environment interaction and interaction with medical indicators of health status will be explored. Next, GWA study on HRQOL will be performed. CONCLUSIONS: Gaining insight into the determinants of HRQOL is essential to assisting efforts in health policy and clinical application to improve well-being and health. In the future, it might be possible to complement HRQOL assessments by examinations of genetic markers. Strengths and weaknesses of the Generation R study are discussed.

Health-related quality of life and family function following pediatric liver transplantation.

This multicenter study compared health-related quality of life (HRQOL) and family function of pediatric liver transplant recipients to those of healthy children to determine if this population differed from a healthy population and to distinguish which pretransplant and posttransplant factors impact HRQOL and family function. HRQOL data from 102 patients achieving 2-year survival were collected with the Infant Toddler Quality of Life Instrument or the Child Health Questionnaire Parent Form 50 parent surveys. Family functioning was assessed with the Family Assessment Device (FAD) completed by each participant's family members. Demographic and clinical information were retrieved from the Studies of Pediatric Liver Transplant database. Recipients 5 years of age and older scored lower than a normative sample in physical health (P < 0.001), general health (P < 0.001), parental emotional impact (P < 0.001), and disruption of family activities (P < 0.001). Younger children, 2 to 5 years of age, scored lower than controls in global health (P = 0.004) and general health perceptions (P < 0.001) but did not differ in subscales measuring physical and psychosocial outcomes. Univariate analysis among the subscales identified demographic but not clinical variables as significant predictors of HRQOL. Mean scores of FAD scales were below published thresholds indicating healthy family functioning. As reported in previous studies, parents of older recipients reported higher levels of stress, although their level of family function appears normal. Significant associations were also observed between FAD scores and demographic variables, suggesting that further investigation of the impact of race, parental marital status, and socio-economic status on the patient rehabilitation process is needed.

Parental reports of health-related quality of life in young children with neurofibromatosis type 1: influence of condition specific determinants.

OBJECTIVE: To assess the health-related quality of life of 34 Dutch children 12 to 72 months of age with neurofibromatosis type 1 (NF1) using the Infant/Toddler Quality of Life Questionnaire (ITQOL) and to investigate the potential impact of clinical factors on parental reports of health-related quality of life. STUDY DESIGN: A parent-completed form including the ITQOL, NF1-specific questions, and sociodemographic questions was sent. ITQOL scale scores were compared for the study population against Dutch reference values. The influence of general and clinical characteristics on ITQOL scale scores was evaluated with multivariate analysis. RESULTS: A significant impact was observed on most aspects of quality of life, particularly for growth and development, general health perceptions and parental impact. The lowest scores were observed in children with complications because of NF1. ITQOL scale scores were affected by parental educational level, familial NF1, and parental reports of complications of NF1 and perceived disease severity. CONCLUSIONS: Important aspects of health-related quality of life were observed to be negatively affected in children with NF1, as measured by the ITQOL. Family-related and disease-related variables appeared to influence the quality of life in children with NF1.

Monitoring quality of life in adults with ADHD: reliability and validity of a new measure.

OBJECTIVE: To develop and evaluate a questionnaire, the ADHD Impact Module for Adults (AIM-A), to dimension quality of life for adults with attention-deficit/hyperactivity disorder (ADHD). METHOD: Six multi-item AIM scales were developed and evaluated in 317 participants enrolled in an open-label trial. Multitrait scaling analysis and correlations between the AIM-A and the ADHD Rating Scale were evaluated. Differences in scale scores based on severity (clinician rated), subtype, previous medication experience, and sensitivity to change were examined, and F statistics were compared for the AIM-A and the ADHD Rating Scale. RESULTS: 100-80% scaling successes were observed for the AIM-A scales. Alpha coefficients were >or=.83. Significant correlations were observed (range: .494 to .200). The AIM-A discriminated based on severity, subtype, and medication experience (p

Childhood chronic conditions and health-related quality of life: Findings from a large population-based study.

The objective of this study was to assess the impact of health-related quality of life (HRQOL) across prevalent chronic conditions, individually and comorbid, in school-aged children in the Netherlands. 5301 children aged 4-11 years from the Dutch Health Interview Survey were included. Parents completed questionnaires regarding child and parental characteristics. HRQOL of children was measured using the Child Health Questionnaire Parent Form 28 (CHQ-PF28). Independent-t tests were used to assess differences in the mean scores of the CHQ-PF28 summary scales and profile scales between children with a prevalent chronic condition (excluding or including children with multiple chronic conditions) and children without a chronic condition. Cohen's effect sizes (d) were calculated to assess the clinical significance of difference. The mean age of children was 7.55 (SD 2.30) years; 50.0% were boys. In children without any chronic condition, the mean score of physical summary scale (PhS) was 58.53 (SD 4.28) and mean score of the psychosocial summary scale (PsS) was 53.86 (SD 5.87). Generally, PhS and/or PsS scores in children with only one condition were lower (p<0.05) than for children without chronic conditions. When children with multiple conditions were included, mean scores of CHQ-PF28 summary and profile scales were generally lower than when they were excluded. The present study shows important information regarding the impact of prevalent chronic conditions on HRQOL in a representative population-based sample of school-aged children in the Netherlands. The information could be used for developing a more holistic approach to patient care and a surveillance framework for health promotion.

The "lost boys of Sudan": functional and behavioral health of unaccompanied refugee minors re-settled in the United States.

OBJECTIVE: To assess the functional and behavioral health of unaccompanied Sudanese refugee minors approximately 1 year after resettlement in the United States. DESIGN: A descriptive survey. SETTING: Local refugee foster care programs affiliated with the US Unaccompanied Refugee Minors Program. PARTICIPANTS: A total of 304 Sudanese refugee minors enrolled in the US Unaccompanied Refugee Minors Program. MAIN OUTCOME MEASURES: Health outcomes were assessed using the Harvard Trauma Questionnaire and the Child Health Questionnaire. Outcomes included the diagnosis of posttraumatic stress disorder and scores on all Child Health Questionnaire subscales and global single-item assessments. RESULTS: Twenty percent of the minors had a diagnosis of posttraumatic stress disorder and were more likely to have lower (worse) scores on all the Child Health Questionnaire subscales. Low functional and behavioral health scores were seen mainly in functioning in the home and in subjective health ratings. Social isolation and history of personal injury were associated with posttraumatic stress disorder. CONCLUSIONS: Unaccompanied Sudanese minors have done well in general. The minors function well in school and in activities; however, behavioral and emotional problems manifest in their home lives and emotional states. The subset of children with traumatic symptoms had characteristics that may distinguish them from their peers and that may inform future resettlement services for unaccompanied minors in the United States.

Reliability and validity of the short form of the child health questionnaire for parents (CHQ-PF28) in large random school based and general population samples.

STUDY OBJECTIVES: This study assessed the feasibility, reliability, and validity of the 28 item short child health questionnaire parent form (CHQ-PF28) containing the same 13 scales, but only a subset of the items in the widely used 50 item CHQ-PF50. DESIGN: Questionnaires were sent to a random regional sample of 2040 parents of schoolchildren (4-13 years); in a random subgroup test-retest reliability was assessed (n = 234). Additionally, the study assessed CHQ-PF28 score distributions and internal consistencies in a nationwide general population sample of (parents of) children aged 4-11 (n = 2474) from Statistics Netherlands. MAIN RESULTS: Response was 70%. In the school and general population samples seven scales showed ceiling effects. Both CHQ summary measures and one multi-item scale showed adequate internal consistency in both samples (Cronbach's alpha>0.70). One summary measure and one scale showed excellent test-retest reliability (intraclass correlation coefficient >0.70); seven scales showed moderate test-retest reliability (intraclass correlation coefficient 0.50-0.70). The CHQ could discriminate between a subgroup with no parent reported chronic conditions (n = 954) and subgroups with asthma (n = 134), frequent headaches (n = 42), and with problems with hearing (n = 38) (Cohen's effect sizes 0.12-0.92; p<0.05 for 39 of 42 comparisons). CONCLUSIONS: This study showed that the CHQ-PF28 resulted in score distributions, and discriminative validity that are comparable to its longer counterpart, but that the internal consistency of most individual scales was low. In community health applications, the CHQ-PF28 may be an acceptable alternative for the longer CHQ-PF50 if the summary measures suffice and reliable estimates of each separate CHQ scale are not required.

Determinants of health-related quality of life in school-aged children: a general population study in the Netherlands.

BACKGROUND: Health related quality of life is the functional effect of a medical condition and/or its therapy upon a patient, and as such is particularly suitable for describing the general health of children. The objective of this study was to identify and confirm potential determinants of health-related quality of life in children aged 4-11 years in the general population in the Netherlands. Understanding such determinants may provide insights into more targeted public health policy. METHODS: As part of a population based cross sectional study, the Child Health Questionnaire (CHQ) Parental Form 28 was used to measure health-related quality of life in school-aged children in a general population sample. Parents of 10,651 children aged 4-11 years were interviewed from January 2001 to December 2009. RESULTS: Multivariate and regression analyses demonstrated a declined CHQ Physical Summary score for children who had >1 conditions, disorders or acute health complaints and who were greater consumers of healthcare; children with a non-western immigrant background; and children whose parents did not work. Lower CHQ Psychosocial Summary score was reported for children who had >1 conditions, disorders or acute health complaints, boys, children of single parents and obese children. CONCLUSION: The best predictors of health-related quality of life are variables that describe use of health care and the number of disorders and health complaints. Nonetheless, a number of demographic, socio-economic and family/environmental determinants contribute to a child's health-related quality of life as well.

Correction: Determinants of Health-Related Quality of Life in School-Aged Children: A General Population Study in the Netherlands.

[This corrects the article DOI: 10.1371/journal.pone.0125083.].

Reliability and validity of comprehensive health status measures in children: The Child Health Questionnaire in relation to the Health Utilities Index.

UNLABELLED: This study assesses the feasibility, reliability and validity of the Child Health Questionnaire-Parent Form (CHQ-PF50), consisting of 11 multi-item scales covering the physical, emotional and social well-being of children. The Health Utilities Index mark 2 (HUI2) was selected for comparison. Parents of 467 Dutch schoolchildren (age 5-13) were sent CHQ and HUI questionnaires. A subgroup of 79 parents of children aged 10-11 were sent a retest after 2 weeks. Feasibility: 78% response with few missing/non-unique CHQ-answers (<1%). Internal consistency: Cronbach's alphas of.39-.96 (mean.72). Item-own scale correlations were higher than item-other scale correlations. Test-retest ICCs were statistically significant for all but two CHQ scales (ICCs.31-.84). Test-retest CHQ-scale means did not show statistically significant differences except for one scale ("Behavior"). VALIDITY: the CHQ-scales, with one exception, correlated better with predefined parallel HUI domains (ICCs.26-.53), than with non-parallel domains. Six CHQ scales discriminated clearly between children with and without chronic conditions and three scales discriminated between high and low medical consumption. This was at least equivalent to the discriminative ability of the HUI2 in this study. Additional studies of test-retest reliability and responsiveness to change of the CHQ in varied populations are needed. From the present study and literature data on other (clinical) populations we conclude that psychometric properties of CHQ-based health status measurement justify application in pediatric outcome studies, in addition to clinical measures.