hh.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Assessment of selection bias in a health survey of children and families – the IDEFICS Sweden-study
Nordic School of Public Health NHV, Gothenburg, Sweden.
Department of Molecular and Clinical Medicine, the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Public Health and Community Medicine, Public Health Epidemiology Unit Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Public Health and Community Medicine, Public Health Epidemiology Unit Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Show others and affiliations
2013 (English)In: BMC Public Health, ISSN 1471-2458, Vol. 13, 418Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: A health survey was performed in 2007-2008 in the IDEFICS/Sweden study (Identification and prevention of dietary- and lifestyle-induced health effects in children and infants) in children aged 2-9 years. We hypothesized that families with disadvantageous socioeconomic and -demographic backgrounds and children with overweight and obesity were underrepresented.

METHODS: In a cross-sectional study, we compared Swedish IDEFICS participants (N=1,825) with referent children (N=1,825) using data from Statistics Sweden population registers. IDEFICS participants were matched for age and gender with a referent child living in the same municipality. Longitudinal weight and height data from birth to 8 years was collected for both populations (n=3,650) from the children's local health services. Outcome measures included the family's socioeconomic and demographic characteristics, maternal body mass index (BMI) and smoking habits before pregnancy, the children's BMI standard deviation score (SDS) at the age of inclusion in the IDEFICS study (BMISDS-index), and the children's BMI-categories during the age-span. Comparisons between groups were done and a multiple logistic regression analysis for the study of determinants of participation in the IDEFICS study was performed.

RESULTS: Compared with IDEFICS participants, referent families were more likely to have lower education and income, foreign backgrounds, be single parents, and have mothers who smoked before pregnancy. Maternal BMI before pregnancy and child's BMISDS-index did not differ between groups. Comparing the longitudinal data-set, the prevalence of obesity was significantly different at age 8 years n= 45 (4.5%) versus n= 31 (2.9%) in the referent and IDEFICS populations, respectively. In the multivariable adjusted model, the strongest significant association with IDEFICS study participation was parental Swedish background (odds ratio (OR) = 1.91, 95% confidence interval (CI) (1.48-2.47) followed by parents having high education OR 1.80, 95% CI (1.02-3.16) and being married or co-habiting OR 1.75 95% CI (1.38-2.23).

CONCLUSION: Families with single parenthood, foreign background, low education and income were underrepresented in the IDEFICS Sweden study. BMI at inclusion had no selection effect, but developing obesity was significantly greater among referents. © 2013 Regber et al.; licensee BioMed Central Ltd.

Place, publisher, year, edition, pages
London: BioMed Central, 2013. Vol. 13, 418
Keyword [en]
Selection bias, Children, Obesity, Health survey, Registers
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:hh:diva-29117DOI: 10.1186/1471-2458-13-418ISI: 000319402900001PubMedID: 23634972Scopus ID: 2-s2.0-84876799845OAI: oai:DiVA.org:hh-29117DiVA: diva2:845050
Available from: 2015-08-10 Created: 2015-08-10 Last updated: 2015-08-11Bibliographically approved
In thesis
1. Barriers and Facilitators of Health Promotion and Obesity Prevention in Early Childhood: A Focus on Parents, Results from the IDEFICS Study
Open this publication in new window or tab >>Barriers and Facilitators of Health Promotion and Obesity Prevention in Early Childhood: A Focus on Parents, Results from the IDEFICS Study
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Background: Childhood obesity has increased dramatically during the past thirty years. Parents are key persons in their children’s lives and their efforts to create healthy lifestyles are very important. However, social and economic determinants of health also affect parents’ opportunities to promote a healthy lifestyle.

Aims: To explore barriers and facilitators in promoting healthy lifestyles and preventing childhood obesity, focusing on parental roles.

Methods and main findings: Three studies originated from the Identification and Prevention of Dietary- and Lifestyle-induced health Effects in Children and InfantS (IDEFICS) study of determinants for two to nine-year-old children’s health in eight European countries. The fourth study was a qualitative interview study conducted in southwest Sweden.

Paper I: In focus group discussions (20 focus groups with children and 36 with parents), parents described lack of time, financial constraints, availability and food marketing techniques as barriers for promoting healthy eating. School policies about food varied; only Sweden and Estonia provided free school lunches. Children described great variation in the availability of unhealthy foods and beverages in their homes.

Paper II: Objectively measured Body Mass Index (BMI) of children (n=16 220) were compared to parents’ perception of and concern for their children’s health and weight status. In all weight categories and all countries, a substantial proportion of parents failed to accurately judge their child’s weight status. In general, parents considered their children to be healthy, irrespective of their weight status. Parents of children with overweight or obesity systematically underestimated their children’s weight status across eight European countries. Accurate parental weight perception in Europe differed according to geographic region.

Paper III: Swedish IDEFICS participants (n=1825) were compared with an age- and sex-matched referent population (n=1825), using registers from Statistics Sweden and the Swedish Medical Birth Register. Longitudinal child growth data (n=3650) were collected from child health centers and school health services. Families with low income, less education, foreign background or single parenthood were underrepresented in the IDEFICS study. BMI at inclusion had no selection effect but, at eight years of age, the obesity prevalence was significantly greater among referents.

Paper IV: A qualitative content analysis was used to interpret the findings from interviews with nurses (n=15) working at child health centers in the southwest of Sweden. The BMI Chart to identify overweight and obesity in children facilitated greater recognition but nurses used it inconsistently, a barrier to prevention. Other barriers were obesity considered a sensitive issue and that some parents wanted overweight children.

Conclusion: Parents may not perceive their child’s growth trajectory from overweight to obesity, and the preschool years may pass without effort to change lifestyle. Therefore, objective measurement and information of children’s BMI weight status by healthcare professionals is of great importance. To reach all parents and avoid selection bias, health surveys or health promoting activities must be tailored. Health promoting activities at the family level as well as the societal level should start early in children’s lives to prevent childhood obesity.

Place, publisher, year, edition, pages
Göteborg: Department of Public Health and Community Medicine, Institute of Medicine at Sahlgrenska Academy, University of Gothenburg, 2014. 75 p.
Keyword
parents, children, obesity, weight perception, registers, prevention, health promotion
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:hh:diva-29130 (URN)978-91-628-8926-5 (ISBN)
Public defence
2014-02-28, Aulan, Nordic School of Public Health NHV, Nya Varvet, Fredrik Bloms väg 25, Göteborg, 13:00 (Swedish)
Opponent
Supervisors
Projects
IDEFICS (EU-project)
Available from: 2015-08-11 Created: 2015-08-10 Last updated: 2015-08-11Bibliographically approved

Open Access in DiVA

fulltext(303 kB)126 downloads
File information
File name FULLTEXT01.pdfFile size 303 kBChecksum SHA-512
77dd32c1a92713aa606239bef24176986d544e1335e451880895e439be091c06826c2829131d7b9229503f4d0fb4c9ab37c75d2cbfcf8199ffe3d7277f048183
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMedScopus

Search in DiVA

By author/editor
Regber, Susann
In the same journal
BMC Public Health
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 126 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 304 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf