A pragmatic controlled trial to prevent childhood obesity within a risk group at maternity and child health-care clinics: results up to six years of age (the VACOPP study)

Taina Mustila, Jani Raitanen, Päivi Keskinen, Riitta Luoto, Taina Mustila, Jani Raitanen, Päivi Keskinen, Riitta Luoto

Abstract

Background: Obesity in childhood appears often during the toddler years. The prenatal environment influences obesity risk. Maternal gestational diabetes, the child's diet, and physical activity in the first few years have an important role in subsequent weight gain. A study was conducted to evaluate effectiveness of a primary health-care lifestyle counselling intervention in prevention of childhood obesity up to 6 years of age.

Methods: The study was a controlled pragmatic trial to prevent childhood obesity and was implemented at maternity and child health-care clinics. The participants (n = 185) were mothers at risk of gestational diabetes mellitus with their offspring born between 2008 and 2010. The prenatal intervention, started at the end of the first trimester of pregnancy, consisted of counselling on diet and physical activity by municipal health-care staff. The intervention continued at yearly appointments with a public health-nurse at child health-care clinics. The paper reports the offspring weight gain results for 2-6 years of age. Weight gain up to 6 years of age was assessed as BMI standard deviation scores (SDS) via a mixed-effect linear regression model. The proportion of children at 6 years with overweight/obesity was assessed as weight-for-height percentage and ISO-BMI. Priority was not given to power calculations, because of the study's pragmatic nature.

Results: One hundred forty seven children's (control n = 76/85% and intervention n = 71/56%) weight and height scores were available for analysis at 6 years of age. There was no significant difference in weight gain or overweight/obesity proportions between the groups at 6 years of age, but the proportion of children with obesity in both groups was high (assessed as ISO-BMI 9.9% and 11.8%) relative to prevalence in this age group in Finland.

Conclusion: As the authors previously reported, the intervention-group mothers had lower prevalence of gestational diabetes mellitus, but a decrease in obesity incidence before school age among their offspring was not found. The authors believe that an effective intervention should start before conception, continuing during pregnancy and the postpartum period through the developmentally unique child's first years.

Trial registration: ClinicalTrials.gov NCT00970710 . Registered 1 September 2009. Retrospectively registered.

Keywords: Childhood obesity; Diet; Gestational diabetes mellitus; Intervention; Physical activity; Pragmatic; Prevention.

Conflict of interest statement

Ethics approval and consent to participate

Ethics approval for the study was granted by the ethics committee of the Hospital District of Vaasa. Informed written consent was provided by all participating mothers prior to the baseline assessments.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Flowchart
Fig. 2
Fig. 2
BMI-SDS in whole group (N = 171) from two years to six years of age. Non-linear model including age of child, mother’s pre-pregnancy weight, and group × age interaction. Obs., observed; Est., estimated

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