Characteristics | Daily mean accelerationa | % waking window > 1000 lxa | Average sleep durationa | ||||||
---|---|---|---|---|---|---|---|---|---|
< 30.8 mgb | ≥ 30.8 mgb | p | < 9.7%b | ≥ 9.7%b | p | < 6h39minb | ≥ 6h39minb | p | |
Age (years), M (SD) | 70.9 (5.8) | 67.8 (5.1) | < 0.001 | 69.6 (5.8) | 69.0 (5.5) | 0.001 | 69.4 (5.7) | 69.2 (5.7) | 0.314 |
Women | 514 (26.1) | 509 (25.8) | 0.884 | 344 (17.5) | 679 (34.4) | < 0.001 | 451 (22.9) | 572 (29.0) | < 0.001 |
Non-white ethnicity | 182 (9.2) | 107 (5.4) | < 0.001 | 159 (8.1) | 130 (6.6) | 0.087 | 169 (8.6) | 120 (6.1) | 0.003 |
High school diploma or above | 577 (29.3) | 634 (32.2) | 0.026 | 678 (34.4) | 533 (27.0) | < 0.001 | 611 (31.0) | 600 (30.4) | 0.487 |
Currently employed | 304 (15.4) | 446 (22.6) | < 0.001 | 397 (20.1) | 353 (17.9) | 0.081 | 412 (20.9) | 338 (17.1) | 0.003 |
Married/cohabiting | 1428 (72.5) | 1516 (76.9) | < 0.001 | 1461 (74.1) | 1483 (75.2) | 0.442 | 1416 (71.9) | 1528 (77.5) | < 0.001 |
Current smokers | 86 (4.4) | 42 (2.1) | < 0.001 | 69 (3.5) | 59 (3.0) | 0.651 | 71 (3.6) | 57 (2.9) | 0.418 |
1–14 alcohol units/week | 1104 (56.0) | 1131 (57.4) | < 0.001 | 1120 (56.8) | 1115 (56.6) | 0.384 | 1121 (56.9) | 1114 (56.7) | 0.949 |
Daily fruit and vegetable consumption | 1504 (76.3) | 1630 (82.7) | < 0.001 | 1542 (78.2) | 1592 (80.8) | 0.053 | 1532 (77.8) | 1602 (81.2) | 0.008 |
Having naps | 1388 (70.4) | 1185 (60.1) | < 0.001 | 1323 (67.1) | 1250 (63.4) | 0.016 | 1413 (71.7) | 1160 (58.8) | < 0.001 |
Body mass index ≥30 kg/m2 | 488 (24.8) | 222 (11.3) | < 0.001 | 353 (17.9) | 357 (18.1) | 0.267 | 399 (20.3) | 311 (15.8) | < 0.001 |
Use of sleep medication | 302 (15.3) | 245 (12.4) | < 0.001 | 281 (14.3) | 266 (13.5) | 0.519 | 272 (13.8) | 275 (13.9) | 0.937 |
Number of chronic conditionsc, M (SD) | 0.8 (0.9) | 0.5 (0.7) | < 0.001 | 0.7 (0.9) | 0.6 (0.8) | 0.007 | 0.7 (0.9) | 0.7 (0.9) | 0.557 |
Mean acceleration (mg), M (SD) | 24.6 (4.4) | 39.2 (7.9) | < 0.001 | 29.5 (8.8) | 34.3 (10.0) | < 0.001 | 31.8 (9.7) | 32.0 (9.8) | 0.635 |
% waking window > 1000 lx, M (SD) | 10.2 (9.8) | 17.2 (13.9) | < 0.001 | 4.1 (2.8) | 23.3 (11.0) | < 0.001 | 13.1 (12.1) | 14.2 (12.9) | 0.005 |
Sleep duration (minutes), M (SD) | 394.6 (60.0) | 393.1 (54.0) | 0.429 | 393.0 (58.5) | 394.8 (55.7) | 0.324 | 349.8 (41.8) | 437.9 (29.9) | < 0.001 |