Combined body mass index and abdominal obesity,lifestyle and health in a Norwegian adult population: a cross-sectional study

Aim

This study aimed to determine the prevalence of combined body mass index and waist circumference (BMI-WC) disease risk categories in a Norwegian adult population aged 18–51 years and describe selected health indicators (lifestyle factors, medical conditions, self-perceived health and high sensitive serum C-reactive protein (hs-CRP)) within these categories.

Subjects and methods

A sample of 1318 adults (aged 18–51 years) answered a comprehensive questionnaire covering lifestyle factors, medical conditions, self-perceived health and background variables in the population-based cross-sectional Telemark study, Norway, 2014–2015. BMI, WC and hs-CRP were determined as part of a broader medical examination. Four combined BMI-WC risk categories were constructed, based on recommendations provided by the US National Institutes of Health (NIH), and associations with health indicators examined using multiple logistic regression analyses.

Results

More than half of the participants represented combined BMI-WC categories with elevated disease risk (27% with increased risk, 11% with high risk and 19% with very high risk). Unfavourable health indicators (low physical activity, cardiovascular disease (CVD) history, physician-diagnosed high blood pressure and diabetes, lowered self-perceived health and elevated hs-CRP) increased in line with BMI-WC disease risk. Associations were observed independent of gender, age, education level and residential area.

Conclusion

The findings highlight the importance of using both BMI categories and WC for personalised assessment of obesity-related risk and need for follow-up. The findings are considered relevant to public health intervention programmes targeting adults with overweight and obesity. Follow-up studies are warranted to study morbidity development in the BMI-WC risk categories.