Response Conversion for improving comparability of International Physical Activity data.

Background: Many questionnaires for measuring physical activity (PA) exist. This complicates the comparison of outcomes.

Methods: In 8 European countries, PA was measured in random samples of 600 persons, using the IPAQ as a 'bridge' to historical sets of country-specific questions.

An accurate and efficient identification of children with psychosocial problems by means of computerized adaptive testing.

Background: Questionnaires used by health services to identify children with psychosocial problems are often rather short. The psychometric properties of such short questionnaires are mostly less than needed for an accurate distinction between children with and without problems. We aimed to assess whether a short Computerized Adaptive Test (CAT) can overcome the weaknesses of short written questionnaires when identifying children with psychosocial problems.

Do differences in maternal age, parity and multiple births explain variations in fetal and neonatal mortality rates in Europe?--Results from the EURO-PERISTAT project.

Perinatal mortality rates differ markedly between countries in Europe. If population characteristics, such as maternal age, parity or multiple births, contribute to these differences, standardised rates may be useful for international comparisons of health status and especially quality of care. This analysis used aggregated population-based data on fetal and neonatal mortality stratified by maternal age, parity and multiple birth from 12 countries participating in the EURO-PERISTAT project to explore this question.

Identification of children with psychosocial problems differed between preventive child health care professionals.

Objective: To assess whether differences between individual Preventive Child Health Care (PCH) professionals in the percentage of children they identify as having psychosocial problems are larger than expected based on chance and whether such differences can be explained by differences in parent-reported problems or risk indicators.

Study Design: We used data from three community-based studies among 3,170 Dutch children aged 8 till 12 years, invited for a routine health examination. Parents filled in the Child Behavior Checklist (CBCL) and questions on demographic characteristics.

Functional outcomes and participation in young adulthood for very preterm and very low birth weight infants: the Dutch Project on Preterm and Small for Gestational Age Infants at 19 years of age.

Objective: Young adults who were born very preterm or with a very low birth weight remain at risk for physical and neurodevelopmental problems and lower academic achievement scores. Data, however, are scarce, hospital based, mostly done in small populations, and need additional confirmation.

Methods: Infants who were born at < 32 weeks of gestation and/or with a birth weight of < 1500 g in The Netherlands in 1983 (Project on Preterm and Small for Gestational Age Infants) were reexamined at age 19.

Computerized adaptive testing for measuring development of young children.

Developmental indicators that are used for routine measurement in The Netherlands are usually chosen to optimally identify delayed children. Measurements on the majority of children without problems are therefore quite imprecise. This study explores the use of computerized adaptive testing (CAT) to monitor the development of young children.

An interval scale for development of children aged 0-2 years.

Measurement of development is often less precise than that of height and weight. Developmental scores are typically based on passing one or more developmental markers, but do not have interval scale so calculating differences between scores can be nonsensical. Age-specific standardized scores are sometimes used, but fail to have a common metric that allows comparison of developmental scores across age.