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Comorbities of overweight/obesity in Australian preschoolers: a cross-sectional population study
  1. M Wake1,2,3,
  2. P Hardy1,2,4,
  3. M G Sawyer5,
  4. J B Carlin2,3,4
  1. 1
    Centre for Community Child Health, Royal Children’s Hospital, Melbourne, Australia
  2. 2
    Murdoch Childrens Research Institute, Melbourne, Australia
  3. 3
    Department of Paediatrics, The University of Melbourne, Melbourne, Australia
  4. 4
    Clinical Epidemiology and Biostatistics Unit, Royal Children’s Hospital, Melbourne, Australia
  5. 5
    Department of Paediatrics, The University of Adelaide, Adelaide, Australia
  1. Melissa Wake, Centre for Community Child Health, Royal Children’s Hospital, Flemington Road, Parkville, VIC 3052, Australia; melissa.wake{at}


Objective: To determine relationships between body mass index (BMI) status and indicators of health and morbidity in a nationally-representative population sample of preschool children.

Methods: Data from the 4–5-year-old cohort in the first wave (2004) of the Longitudinal Study of Australian Children were studied. Main outcome measures were: measured child BMI, categorised as non-overweight, overweight and obese using International Obesity TaskForce cutpoints; parent-reported child global health, health-related quality of life, mental health problems, asthma, sleep problems, injuries, special health care needs, and level of parental concern about the child’s weight. Regression methods were used to assess associations with child’s BMI status, adjusted for sociodemographic factors.

Results: BMI was available for 4934 (99%) children; 756 (15.3%) were overweight and 258 (5.2%) obese. Compared to non-overweight children, parents of overweight and obese children reported a higher prevalence of special health care needs (adj OR 1.72, 95% CI 1.20 to 2.46), but other health outcomes were similar. Parental concern about the child’s weight was low among the overweight (14.4%) and non-overweight (17.8%) children, but rose to 52.7% in the obese. However, parental concern was unrelated to any of the specific health problems studied.

Conclusions: Despite a high prevalence of overweight/obesity, parents of overweight and obese children reported relatively few additional health burdens over and above those of the non-overweight preschoolers. These findings may shed light on the disparity between strong public concern and parents’ expressed lack of concern about overweight/obesity in their own children around the time of school entry.

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  • None.

  • The analysis and writing of this paper were funded by Australian National Health and Medical Research Council Project Grant 334308, and Associate Professor Wake was supported by NHMRC Population Health Career Development Grant 284556. We also thank Belinda Davey and Louise Canterford who assisted with the initial and final stages, respectively, of the preparation of this manuscript.