Bouts of 1–9 min | Bouts of ≥10 min | P (no difference)† | |||||||
MVPA | HR ‡ | 95% CI | HR ‡ | 95% CI | HR ‡ | 95% CI | HR ‡ | 95% CI | |
Model 1§ | 0.99 | (0.98 to 1.00) | 0.99 | (0.98 to 1.01) | 0.594 | ||||
Model 2¶ | 0.99 | (0.98 to 1.00) | 0.99 | (0.98 to 1.01) | |||||
Model 3** | 0.99 | (0.98 to 1.00) | 0.99 | (0.98 to 1.01) | |||||
LIPA | |||||||||
Model 1§ | 1.00 | (1.00 to 1.00) | 1.00 | (0.99 to 1.01) | 0.482 | ||||
Model 2¶ | 1.00 | (1.00 to 1.00) | 1.00 | (0.99 to 1.01) | |||||
Model 3** | 1.00 | (1.00 to 1.00) | 1.00 | (0.99 to 1.01) | |||||
Sedentary behaviour | 1–15 min | 16–30 min | 31–60 min | >61 min | |||||
Model 1§ | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 0.290 |
Model 2¶ | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | |
Model 3** | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) | 1.01 | (1.00 to 1.01) |
Bold values denote P<0.05.
*The number of min/day in bouts of the specified duration. HR is per minute of activity.
†Post hoc test for no difference between bout durations.
‡HR per minute in bout of specified duration.
§Model 1=age+region of residence+season of wear+accelerometer wear time+minutes of sedentary behaviour.
¶ Model 2=model 1+social class+alcohol use+smoking+sleep time+living alone+body mass index.
** Model 3=model 2+mobility disability.
CHD, coronary heart disease; LIPA, light physical activity; MVPA, moderate to vigorous physical activity.