BMI-country income level interaction | OR (95% CI)* | p Value | BMI-country income level interaction | OR (95% CI)* | p Value |
---|---|---|---|---|---|
BMI 18.5–24.9 kg/m2 (reference) | 1.00 | BMI 18.5–24.9 kg/m2 (reference) | 1.00 | ||
BMI 25.0–29.9 kg/m2 × country income level | 1.14 (0.78 to 1.65) | 0.500 | BMI 25.0–29.9 kg/m2 × country income level | 1.14 (0.78 to 1.65) | 0.506 |
BMI ≥30.0 kg/m2 × country income level | 1.55 (1.06 to 2.28) | 0.025 | BMI 30.0–34.9 kg/m2 × country income level | 1.52 (0.99 to 2.34) | 0.056 |
BMI ≥35.0 kg/m2 × country income level | 1.77 (1.00 to 3.11) | 0.048 |
Estimates are based on pooled analysis of all nine countries.
Country income level was a dichotomous variable with low-income or middle-income countries (China, Ghana, India, Mexico, Russia, South Africa) coded as 0 and high-income countries (Finland, Poland, Spain) coded as 1. All countries classified as low-income or middle-income countries were from the WHO Study on global AGEing and adult health (SAGE) survey and countries classified as high-income countries were from the Collaborative Research on Ageing in Europe (COURAGE) survey.
*The OR indicate the change in the OR associated with being in that BMI category for high-income countries relative to low-income or middle-income countries adjusting for age, sex, education, marital status, wealth and smoking.
BMI, body mass index.