Characteristics of sedentary behaviour in 1403 men in the British Regional Heart Study
| Number of men (%) | Sedentary behaviour (min/day) | Wear time in sedentary behaviour* (%) | Number of bouts sedentary behaviour/day† | Number of breaks per sedentary hour‡ | |||||
|---|---|---|---|---|---|---|---|---|---|
| Mean (95% CI)§ | p Value¶ | Mean (95% CI)§ | p Value¶ | Mean (95% CI)§ | p Value¶ | Mean (95% CI)§ | p Value¶ | ||
| All men§,** | 1403 | 618 (614 to 621) | 72.4 (72.0 to 72.8) | 71.9 (71.2 to 72.6) | 7.2 (7.1 to 7.3) | ||||
| Age group | <0.001 | <0.001 | <0.001 | <0.001 | |||||
| 70 to <75 years | 389 (27.7) | 602 (595 to 609) | 69.7 (68.9 to 70.5) | 73.4 (72.2 to 74.6) | 7.6 (7.4 to 7.8) | ||||
| 75 to <80 years | 544 (38.8) | 610 (603 to 616) | 71.2 (70.5 to 72.0)†† | 72.7 (71.6 to 73.8) | 7.4 (7.2 to 7.6) | ||||
| ≥80 years | 470 (33.5) | 641 (635 to 647)†† | 76.0 (75.3 to 76.7)†† | 69.6 (68.3 to 70.9)†† | 6.7 (6.5 to 6.9)†† | ||||
| BMI (kg/m2) | 0.002 | <0.001 | <0.001 | <0.001 | |||||
| <25 | 406 (28.9) | 614 (606 to 621) | 71.5 (70.6 to 72.3) | 74.5 (73.2 to 75.8) | 7.5 (7.3 to 7.7) | ||||
| 25 to <30 | 722 (51.5) | 613 (608 to 618) | 71.7 (71.1 to 72.3) | 72.7 (71.7 to 73.7) | 7.4 (7.2 to 7.5) | ||||
| ≥30 | 275 (19.6) | 637 (629 to 644)†† | 75.7 (74.8 to 76.5)†† | 65.7 (64.1 to 67.3)†† | 6.4 (6.2 to 6.6)†† | ||||
| Smoking status | 0.012 | 0.073 | 0.008 | 0.297 | |||||
| Non-smoker | 1356 (96.7) | 617 (613 to 620) | 72.3 (71.9 to 72.7) | 71.7 (71.0 to 72.4) | 7.2 (7.1 to 7.3) | ||||
| Smoker | 47 (3.3) | 649 (627 to 671)†† | 74.9 (72.4 to 77.4) | 77.6 (73.3 to 82.0)†† | 7.5 (6.9 to 8.2) | ||||
| Depression | <0.001 | <0.001 | <0.001 | <0.001 | |||||
| Not depressed | 1094 (78.0) | 613 (609 to 617) | 71.3 (70.8 to 71.8) | 73.1 (72.3 to 73.9) | 7.4 (7.3 to 7.5) | ||||
| Depressed | 309 (22.0) | 634 (626 to 642)†† | 76.4 (75.4 to 77.3)†† | 67.4 (65.8 to 68.9)†† | 6.6 (6.4 to 6.8)†† | ||||
| Chronic conditions | <0.001 | <0.001 | <0.001 | <0.001 | |||||
| None | 657 (46.8) | 621 (615 to 627) | 73.0 (72.3 to 73.7) | 71.3 (70.1 to 72.5) | 7.1 (6.9 to 7.3) | ||||
| 1–2 | 644 (45.9) | 630 (619 to 640)†† | 74.4 (73.1 to 75.6)†† | 69.4 (67.4 to 71.4)†† | 6.9 (6.6 to 7.2)†† | ||||
| ≥3 | 102 (7.3) | 652 (637 to 667)†† | 78.3 (76.5 to 80.1)†† | 66.6 (63.3 to 70.0)†† | 6.3 (5.9 to 6.8)†† | ||||
*Percentage sedentary=100×sedentary (<100 cpm) minutes/total wear time (min).
†A bout of sedentary behaviour is a period of consecutive minutes where the accelerometer registers <100 cpm.
‡A break in sedentary behaviour is at least one minute where the accelerometer registers >100 cpm following a sedentary bout.
§Marginal means are adjusted for age, BMI, smoking status, wear time, day order of week, number of chronic diseases and depression.
¶p Value tests for equal means across all levels of the subgroup.
**Ambulatory men, not in a care home, no missing covariate data.
††Pairwise mean difference p<0.05 when compared to age <75, BMI <25, non-smoker, not depressed, or 0 chronic conditions.
BMI, body mass index.