Wilma Jansen

Feeling Fat Rather than Being Fat May Be Associated with Psychological Well-Being in Young Dutch Adolescents

PURPOSE To contribute to a further exploration of the association of psychosocial well-being with overweight and weight perception among young Dutch adolescents. METHODS Data from the ongoing Rotterdam Youth Health Monitor were used from 1,923 9-10-year-olds and 3,841 12-13-year-olds. The association of mental health indicators with weight status based on self-report and measured height and weight was studied with logistic regression analyses in both age groups cross-sectionally. Additional longitudinal analyses were conducted among the 787 pupils for whom follow-up data were available. Interactions with gender and ethnic background were explored. Among the 12-13-year-olds, the role of weight perception was also studied. RESULTS We found that 9-10-year-old obese boys scored more favourably on social anxiety than nonoverweight boys. Among 12-13-year-olds body weight perception, rather than self-reported or measured weight status was associated with mental health indicators. Mental health indicators at age 9-10 years did not predict self-reported weight status at age 12-13 or change in weight status between 9-10 and 12-13 years, nor did weight status at age 9-10 years predict later mental health indicators or change in these indicators. CONCLUSIONS This study provides no evidence that overweight does coincide with less favorable psychological well-being in young adolescents. In 12-13-year-old adolescents, feeling overweight, rather than being overweight, appears to be important.

Differences in Measured and Self-Reported Height and Weight in Dutch Adolescents

Background/Aims: Monitoring overweight prevalence and its trends in Dutch youth is frequently based on self-reported data. The validity of self-reported data especially in young adolescents is not sufficiently known. The purpose of this study is to study the validity of self-reported height and weight in 12- to 13-year-olds, to identify sociodemographic correlates and to explore whether correction factors can be developed to estimate the prevalence of overweight in youth. Methods: 5,525 12- to 13-year-old pupils in the Rotterdam area filled in a confidential questionnaire on health topics, including their height and weight. In a sub-sample of 499 pupils both self-reported and measured height and weight were available. Results: Self-reported data led to a considerable underestimation of Body Mass Index and consequently the prevalence of overweight. Underestimation was higher in pupils who regarded themselves as more fat, were of non-Dutch origin and in lower education levels. Conclusion: Self-reported height and weight appeared to be inappropriate to estimate the overweight prevalence in 12- to 13-year-olds, unless the figures were adjusted. Using adjusted self-reported BMI on an individual level is questionable. Actual measurements of height and weight are necessary to draw up valid correction formulas in new samples.

Prevalence of bullying and victimization among children in early elementary school : Do family and school neighbourhood socioeconomic status matter?

BackgroundBullying and victimization are widespread phenomena in childhood and can have a serious impact on well-being. Children from families with a low socioeconomic background have an increased risk of this behaviour, but it is unknown whether socioeconomic status (SES) of school neighbourhoods is also related to bullying behaviour. Furthermore, as previous bullying research mainly focused on older children and adolescents, it remains unclear to what extent bullying and victimization affects the lives of younger children. The aim of this study is to examine the prevalence and socioeconomic disparities in bullying behaviour among young elementary school children.MethodsThe study was part of a population-based survey in the Netherlands. Teacher reports of bullying behaviour and indicators of SES of families and schools were available for 6379 children aged 5–6 years.ResultsOne-third of the children were involved in bullying, most of them as bullies (17%) or bully-victims (13%), and less as pure victims (4%). All indicators of low family SES and poor school neighbourhood SES were associated with an increased risk of being a bully or bully-victim. Parental educational level was the only indicator of SES related with victimization. The influence of school neighbourhood SES on bullying attenuated to statistical non-significance once adjusted for family SES.ConclusionsBullying and victimization are already common problems in early elementary school. Children from socioeconomically disadvantaged families, rather than children visiting schools in disadvantaged neighbourhoods, have a particularly high risk of involvement in bullying. These findings suggest the need of timely bullying preventions and interventions that should have a special focus on children of families with a low socioeconomic background. Future studies are necessary to evaluate the effectiveness of such programs.

Effectiveness of a primary school‐based intervention to reduce overweight

OBJECTIVES The purpose of this study was to evaluate the effect of a school-based intervention program to reduce overweight and improve fitness in primary school children. METHODS A cluster randomized controlled design was used over one school year with schools as unit of randomization. In total 20 schools and 2,622 children aged 6-12 years (grades 3-8) from multi-ethnic, low income inner-city neighbourhoods in Rotterdam, Netherlands, participated. The intervention, named Lekker Fit! (Enjoy being fit!) was a multi-component intervention based on behavioural and ecological models. Main components of the intervention are the implementation of three physical education (PE) sessions a week by a professional PE teacher, additional sport and play activities outside school hours and an educational program. Main primary outcome measures were weight status, body mass index (BMI), waist circumference and fitness (20 m shuttle run). RESULTS Significant positive intervention effects were found for percentage overweight children (OR 0.53; 95% CI 0.36-0.78), waist circumference (-1.29 cm; 95% CI -2.16 to -0.42 cm) and 20 m shuttle run (0.57 laps; 95% CI 0.13-1.01 laps) among pupils of grades 3-5 (6-9-year olds). The prevalence of overweight in grades 3-5 increased by 4.3% in the control group and by 1.3% in the intervention group. No significant effects were found for BMI or for grades 6-8 (9-12-year olds). CONCLUSIONS Our results provide evidence for the effectiveness of the multi-component intervention Lekker Fit! among pupils of grades 3-5 and adds to the growing body of evidence that school-based programs with a focus on PA are most effective in reducing childhood obesity. [ISRCTN84383524].

Validity and Reliability of the Strengths and Difficulties Questionnaire in 5–6 Year Olds: Differences by Gender or by Parental Education?

Introduction The Strengths and Difficulties Questionnaire (SDQ) is a relatively short instrument developed to detect psychosocial problems in children aged 3–16 years. It addresses four dimensions: emotional problems, conduct problems, hyperactivity/inattention problems, peer problems that count up to the total difficulties score, and a fifth dimension; prosocial behaviour. The validity and reliability of the SDQ has not been fully investigated in younger age groups. Therefore, this study assesses the validity and reliability of the parent and teacher versions of the SDQ in children aged 5–6 years in the total sample, and in subgroups according to child gender and parental education level. Methods The SDQ was administered as part of the Dutch regularly provided preventive health check for children aged 5–6 years. Parents provided information on 4750 children and teachers on 4516 children. Results Factor analyses of the parent and teacher SDQ confirmed that the original five scales were present (parent RMSEA = 0.05; teacher RMSEA = 0.07). Interrater correlations between parents and teachers were small (ICCs of 0.21–0.44) but comparable to what is generally found for psychosocial problem assessments in children. These correlations were larger for males than for females. Cronbach’s alphas for the total difficulties score were 0.77 for the parent SDQ and 0.81 for the teacher SDQ. Four of the subscales on the parent SDQ and two of the subscales on the teacher SDQ had an alpha <0.70. Alphas were generally higher for male children and for low parental education level. Discussion The validity and reliability of the total difficulties score of the parent and teacher SDQ are satisfactory in all groups by informant, child gender, and parental education level. Our results support the use of the SDQ in younger age groups. However, some subscales are less reliable and we recommend only to use the total difficulties score for screening purposes.

A school-based intervention to reduce overweight and inactivity in children aged 6–12 years: study design of a randomized controlled trial

BackgroundEffective interventions to prevent overweight and obesity in children are urgently needed especially in inner-city neighbourhoods where prevalence of overweight and inactivity among primary school children is high. A school based intervention was developed aiming at the reduction of overweight and inactivity in these children by addressing both behavioural and environmental determinants.Methods/designThe main components of the intervention (Lekker Fit!) are the re-establishment of a professional physical education teacher; three (instead of two) PE classes per week; additional sport and play activities outside school hours; fitness testing; classroom education on healthy nutrition, active living and healthy lifestyle choices; and the involvement of parents. The effectiveness of the intervention is evaluated through a cluster randomized controlled trial in 20 primary schools among grades 3 through 8 (6–12 year olds). Primary outcome measures are BMI, waist circumference and fitness. Secondary outcome measures are assessed in a subgroup of grade 6–8 pupils (9–12 year olds) through classroom questionnaires and constitute of nutrition and physical activity behaviours and behavioural determinants. Multilevel regression analyses are used to study differences in outcomes between children in the intervention schools and in control schools, taking clustering of children within schools into account.DiscussionHypotheses are that the intervention results in a lower prevalence of children being overweight and an improved mean fitness score, in comparison with a control group where the intervention is not implemented. The results of our study will contribute to the discussion on the role of physical education and physical activity in the school curriculum.Trial registration[ISRCTN84383524]

Equity-specific effects of 26 Dutch obesity-related lifestyle interventions

CONTEXT Reducing health inequalities is a policy priority in many developed countries. Little is known about effective strategies to reduce inequalities in obesity and its underlying behaviors. The goal of the study was to investigate differential effectiveness of interventions aimed at obesity prevention, the promotion of physical activity or a healthy diet by SES. EVIDENCE ACQUISITION Subgroup analyses in 2010 and 2011 of 26 Dutch studies funded by The Netherlands Organization for Health Research and Development after 1990 (n=17) or identified by expert contact (n=9). Methodologic quality and differential effects were synthesized in harvest plots, subdivided by setting, age group, intensity, and time to follow-up. EVIDENCE SYNTHESIS Seven lifestyle interventions were rated more effective and four less effective in groups with high SES; for 15 studies no differential effects could be demonstrated. One study in the healthcare setting showed comparable effects in both socioeconomic groups. The only mass media campaign provided modest evidence for higher effectiveness among those with high SES. Individually tailored and workplace interventions were either more effective in higher-SES groups (n=4) or no differential effects were demonstrated (n=9). School-based studies (n=7) showed mixed results. Two of six community studies provided evidence for better effectiveness in lower-SES groups; none were more effective in higher-SES groups. One high-intensity community-based study provided best evidence for higher effectiveness in low-SES groups. CONCLUSIONS Although for the majority of interventions aimed at obesity prevention, the promotion of physical activity, or a healthy diet, no differential effectiveness could be demonstrated, interventions may widen as well as reduce socioeconomic inequalities in these outcomes. Equity-specific subgroup analyses contribute to needed knowledge about what may work to reduce socioeconomic inequalities in obesity and underlying health behaviors.

Correlates of physical activity in 2-year-old toddlers: the generation R study.

OBJECTIVE To describe and identify correlates of objectively measured physical activity and sedentary behavior in 2-year-old toddlers. STUDY DESIGN A total of 347 children participating in a birth cohort study wore a unaxial ActiGraph accelerometer during 1 weekday and 1 weekend day. Information on potential correlates was assessed by parent-reported questionnaires, delivery reports, and regular visits to child health centers. Univariate and multivariable linear regression analyses were conducted to examine the associations between potential correlates and the following physical activity outcomes: percentage of time spent in sedentary behavior, percentage of time spent in moderate-to-vigorous physical activity, and mean counts per minute. RESULTS A high percentage of monitored time was spent in sedentary behavior; 85.6% on weekdays and 84.5% on weekend days. Four correlates were significantly associated with at least 1 physical activity outcome in the multivariable regression models: childs sex, childs age, number of siblings, and season of measurement. The associations of gross motor development with moderate-to-vigorous physical activity and mean counts per minute approached significance. Associations of socioeconomic variables and childs body mass index z-score with physical activity outcomes were not significant. CONCLUSION Two-year-old toddlers spend most of their time in sedentary behavior. No modifiable correlates were identified. Further research on physical activity and associated health benefits among very young children is warranted.

Discrepancies Between Parent-Child Reports of Internalizing Problems Among Preadolescent Children: Relationships with Gender, Ethnic Background, and Future Internalizing Problems

In a multiethnic community sample of 1,170 preadolescent children, it was investigated whether discrepancies in parent-child reports of internalizing problems are related with gender, ethnic background (Dutch, Surinamese/ Antillean, Moroccan, Turkish, Other) and with future internalizing problems. No significant differences in discrepancy scores between boys and girls were found. Parent-child disagreement of internalizing problems varied across ethnic groups, with significant differences among children from Surinamese/ Antillean (children reporting more internalizing problems than their parents) and Turkish background (parents reporting more internalizing problems than their children). Disagreement between parents and their preadolescent child significantly contributed to the prediction of self-reported internalizing problems in early adolescence. For the early identification of internalizing problems, it is recommended to include both parent and child self-reports as part of routine health examinations in the setting of preventive youth health care because when parents underreport problems relative to their child, this can predict future internalizing problems.

Validation of the SDQ in a multi-ethnic population of young children

BACKGROUND The Strengths and Difficulties Questionnaire (SDQ) is a valuable screening tool for identifying psychosocial problems. Its performance in a multi-ethnic society, common to many paediatric health care workers, has not been investigated. Because it is important that screening instruments are valid and reliable for all ethnic groups within one society, we examined differences in the SDQs psychometric properties in a multi-ethnic society. METHODS The SDQ parent (n = 8114) and teacher form (n = 9355) were completed as part of a preventive health check for children aged 5-6 years of Dutch and non-Dutch ethnic backgrounds. The Child Behaviour Checklist (CBCL)/Teacher Report Form (TRF) was administered to a subsample. RESULTS Factor analysis of the parent-rated SDQ showed different rating patterns for two of the five subscales for non-Dutch children as compared with Dutch children. Cronbachs alpha for the total difficulties score varied by ethnic group (0.73-0.78 parent-rated SDQ, 0.80-0.83 teacher-rated SDQ), and coefficients were generally smaller for non-Dutch than for Dutch children (P < 0.05). Alpha coefficients for subscales varied between 0.31-0.85 for ethnic groups. Inter-rater correlations between parents and teachers for the total difficulties score varied between 0.20-0.41 between ethnic groups and were larger for Dutch than for non-Dutch children (P < 0.05). Concurrent validity was acceptable for most scales and most ethnic groups. CONCLUSION The total difficulties score of the parent- and teacher-rated SDQ is valid and reliable for different ethnic groups within Dutch society. However, there are differences in reliability and validity of the subscales, which makes interpretation of the subscales difficult for certain ethnic groups.