Table 4: Odds ratios for the joint effect of BMI and physical activity on incidence of hypertension with underweight women excluded.

WeightPhysical activity*
HighModerateLowNil

Unadjusted odds ratios (95% CI)
 Healthy weight1.00 (reference)1.07 (0.85, 1.35)1.46 (1.19, 1.80)1.38 (1.07, 1.79)
 Overweight2.22 (1.80, 2.74)2.11 (1.69, 2.63)2.50 (2.04, 3.06)2.53 (2.01, 3.19)
 Obese3.47 (2.72, 4.42)4.29 (3.39, 5.43)4.61 (3.75, 5.66)4.98 (4.01, 6.18)
Adjusted odds ratios (95% CI)
 Healthy weight1.00 (reference)1.03 (0.81, 1.31)1.45 (1.17, 1.79)1.37 (1.05, 1.78)
 Overweight2.23 (1.80, 2.76)2.13 (1.70, 2.67)2.44 (1.98, 2.99)2.46 (1.94, 3.12)
 Obese3.43 (2.68, 4.39)4.21 (3.30, 5.37)4.55 (3.69, 5.61)4.91 (3.92, 6.13)

Physical activity defined as nil/sedentary (0–39 metabolic equivalent (MET) min/wk), low (40–599 MET min/wk), moderate (600–1199 MET min/wk), and high (≥1200 MET min/wk).
BMI (kg/m2) categorised as healthy: 18.5–25; overweight: 25–29; obese: ≥30.
Adjusted for age and education at survey 1 and time-dependent smoking, alcohol consumption, and presence of cardiovascular disease.