Multivariable model for WC in women (includes all sedentary and physical activity categories that correlated with WC, as well as all established main confounders)
| Model (R2=0.14) | β | SE | R2 | p Value |
|---|---|---|---|---|
| Age (years) | 0.39 | 0.09 | 0.027 | <0.001 |
| Genetic obesity risk score (range 16.1–39.8) | 2.2 | 0.83 | 0.010 | 0.01 |
| TV viewing (h/day) | 1.81 | 0.44 | 0.022 | <0.001 |
| Computer use (h/day) | 1.00 | 0.33 | 0.012 | <0.01 |
| Other relaxation (h/day) | −0.02 | 0.47 | 0.0001 | 0.96 |
| Listening to radio/music (h/day) | −0.05 | 0.62 | 0.0001 | 0.93 |
| Leisure-time exercise (MET h/week) | −0.11 | 0.03 | 0.019 | <0.01 |
| Strenuous gardening and related housework (h/month) | −0.01 | 0.04 | 0.0001 | 0.90 |
| Occupational physical workload (scale 1–6) | 0.61 | 0.34 | 0.004 | 0.07 |
| Energy intake (100 kcal/day) | −0.007 | 0.02 | 0.0002 | 0.72 |
| Energy intake*energy intake | 0.00004 | 0.00003 | 0.002 | 0.19 |
| Diet score (scale, range 1–27) | 0.48 | 0.70 | 0.0006 | 0.49 |
| Diet score*diet score | −0.02 | 0.02 | 0.0008 | 0.45 |
| Sleep duration (scale, range 1–10) | −2.53 | 1.38 | 0.005 | 0.07 |
| Sleep duration*sleep duration | 0.20 | 0.13 | 0.003 | 0.13 |
| Socioeconomic status (scale, 1–3) | −0.93 | 0.56 | 0.004 | 0.09 |
| Alcohol (drinks/day) | 0.14 | 0.58 | 0.0001 | 0.80 |
| Smoking (no/yes) | 0.02 | 1.25 | 0.0001 | 0.98 |
β=increase in WC caused by a one unit increase in the measured parameter.
R2=per cent that model or measured parameter accounts for the variance of WC.
MET index=leisure-time exercise+active commuting.
*The increase in β with one unit increase in energy intake, diet score and sleep duration is expressed in their quadratic terms, since these variables had a significant U-shaped relation with BMI and WC.
BMI, body mass index; MET, metabolic equivalent; diet score, adherence to the recommended diet; WC, waist circumference.