Table 2.
Linear relationshipa between total sitting time in hours/day (independent variable) and BMIb percent change per year between baseline and follow-up (dependent variable), stratified by sex, employment status, baseline BMI, and MVPAc
| Intercept (95% CI)d | b (95% CI)e | |
|---|---|---|
| All participants (n = 26,493) | 4.09 (3.61, 4.58) | 0.00 (−0.01, 0.00) |
| Sex | ||
| Women (n = 14,883) | 3.97 (3.35, 4.58) | 0.00 (−0.02, 0.01) |
| Men (n = 11,610) | 6.29 (5.52, 7.06) | −0.01 (−0.02, 0.00) |
| Employment status | ||
| Not working (n = 6,814) | 4.65 (3.71, 5.59) | 0.01 (−0.02, 0.03) |
| Part time (n = 7,113) | 3.70 (2.82, 4.57) | 0.00 (−0.02, 0.02) |
| Full time (n = 12,566) | 4.14 (3.42, 4.87) | −0.01 (−0.02, −0.00)* |
| BMIb (kg/m2) | ||
| <18.5 (n = 256) | 17.53 (4.72, 30.35) | −0.08 (−0.40, 0.24) |
| 18.5–25 (n = 10,398) | 2.31 (1.70, 2.91) | 0.00 (−0.02, 0.01) |
| 25–30 (n = 10,623) | 1.38 (0.83, 1.94) | −0.01 (−0.02, 0.00) |
| ≥30 (n = 5,216) | 0.63 (−0.34, 1.60) | 0.01 (−0.01, 0.03) |
| MVPAc (minutes/week) | ||
| <150 (n = 4,204) | 3.45 (2.23, 4.68) | −0.01 (−0.03, 0.02) |
| 150–300 (n = 4,589) | 2.96 (1.78, 4.14) | −0.01 (−0.03, 0.01) |
| ≥300 (n = 17,700) | 4.38 (3.79, 4.98) | 0.00 (−0.01, 0.01) |
Adjusted for age, sex, educational level, area level socio-economic status, employment status, baseline BMI, chronic illnesses, risk of psychological distress, self-reported general health, and MVPA.
Body mass index calculated from self-reported height and weight.
Time spent in moderate- to vigorous-intensity physical activity.
Intercept for BMI percent change per year between baseline and follow-up (%) and its 95% confidence interval.
Unstandardized regression coefficient (slope) for total sitting time and its 95% confidence interval.
P < 0.05; **P < 0.01; ***P < 0.001.