Table 1 Basic characteristics of participants by current work schedule (n = 277,059)
Characteristics | Current work schedule | P value | ||
|---|---|---|---|---|
Day workers | Shift, but rarely/some night shifts | Usual/permanent night shifts | Â | |
No. of subjects (%) | 229,478 (82.83) | 37,057 (13.37) | 10,524 (3.80) | Â |
Male, No. (%) | 106,946 (46.60) | 19,563 (52.79) | 6554 (62.28) |  < 0.001 |
Age, mean (SD), years | 52.89 ± 7.09 | 51.96 ± 7.00 | 51.23 ± 6.79 |  < 0.001 |
BMI, mean (SD), kg/m2 | 27.07 ± 4.63 | 27.92 ± 4.94 | 28.41 ± 4.89 |  < 0.001 |
White, no. (%) | 217,873 (94.94) | 33,153 (89.46) | 9126 (86.72) |  < 0.001 |
Smoking status, No. (%) |  |  |  |  < 0.001 |
 Never | 134,324 (58.53) | 19,976 (53.91) | 5608 (53.29) |  |
 Previous | 73,077 (31.84) | 11,696 (31.56) | 3152 (29.95) |  |
 Current | 22,077 (9.62) | 5385 (14.53) | 1764 (16.76) |  |
Alcohol drinking, No. (%) |  |  |  |  < 0.001 |
 Never | 6992 (3.05) | 1779 (4.80) | 643 (6.11) |  |
 Previous | 5783 (2.52) | 1279 (3.45) | 399 (3.79) |  |
 Current | 216,703 (94.43) | 33,999 (91.75) | 9482 (90.10) |  |
Sleep duration, mean (SD), h/day | 7.07 ± 0.94 | 6.97 ± 1.06 | 6.83 ± 1.18 |  < 0.001 |
Townsend deprivation index, median (IQR) |  − 2.26 (− 3.70 to 0.17) |  − 1.34 (− 3.20 to 1.62) |  − 1.12 (− 3.09 to 1.95) |  < 0.001 |
IPAQ activity group, No. (%) |  |  |  |  < 0.001 |
 Low | 39,990 (17.43) | 4385 (11.83) | 1057 (10.04) |  |
 Moderate | 79,622 (34.70) | 9849 (26.58) | 2434 (23.13) |  |
 High | 71,981 (31.37) | 14,866 (40.12) | 4503 (42.79) |  |
 Not reported | 37,885 (16.51) | 7957 (21.47) | 2530 (24.04) |  |
Chronotype, No. (%) |  |  |  |  < 0.001 |
 Morning type | 53,044 (23.12) | 9158 (24.71) | 1987 (18.88) |  |
 Intermediate type | 133,571 (58.21) | 20,585 (55.55) | 5445 (51.74) |  |
 Evening type | 18,203 (7.93) | 3096 (8.35) | 1566 (14.88) |  |
 Not reported | 24,660 (10.75) | 4218 (11.38) | 1526 (14.50) |  |
 Asthma, No. (%) | 29,970 (13.06) | 5004 (13.50) | 1370 (13.02) | 0.06 |