Variable | n for all days | All days | n for working days and days off | Working days | Days off | P values for day difference | |||
Mean | 95% CI | Mean | 95% CI | Mean | 95% CI | ||||
All* | 878 | 2510 | 2470 to 2540 | 771 | 2530 | 2480 to 2570 | 2530 | 2480 to 2580 | 0.86 |
Gender† | |||||||||
Men | 136 | 2110 | 2020 to 2200 | 115 | 2110 | 2000 to 2230 | 2260 | 2150 to 2380 | 0.004 |
Women | 742 | 2580 | 2540 to 2620 | 656 | 2580 | 2530 to 2630 | 2600 | 2550 to 2650 | 0.29 |
P values for gender difference | <0.001 | <0.001 | <0.001 | ||||||
Men, by occupational category‡ | |||||||||
Managers and professionals | 72 | 2060 | 1930 to 2180 | 69 | 2010 | 1900 to 2120 | 2270 | 2120 to 2420 | 0.01 |
Associate professionals | 26 | 2110 | 1900 to 2310 | 21 | 2160 | 1950 to 2360 | 2120 | 1850 to 2380 | 0.22 |
Service workers | 13 | 2260 | 1960 to 2550 | 10 | 2270 | 1980 to 2560 | 2260 | 1970 to 2540 | 0.51 |
Manual workers | 25 | 2150 | 1940 to 2360 | 15 | 2440 | 2220 to 2650 | 2100 | 1870 to 2330 | 0.0007 |
P values for differences in occupations | 0.68 | 0.07 | 0.66 | ||||||
Women, by occupational category‡ | |||||||||
Managers and professionals | 270 | 2460 | 2390 to 2520 | 245 | 2390 | 2320 to 2560 | 2570 | 2490 to 2650 | <0.001 |
Associate professionals | 233 | 2500 | 2440 to 2570 | 201 | 2490 | 2410 to 3000 | 2600 | 2500 to 2700 | 0.001 |
Service workers | 197 | 2770 | 2700 to 2850 | 173 | 2910 | 2810 to 3390 | 2600 | 2490 to 2700 | <0.001 |
Manual workers | 42 | 2910 | 2750 to 3070 | 37 | 3200 | 3000 to 3390 | 2460 | 2250 to 2670 | <0.001 |
P values for differences in occupations | <0.001 | <0.001 | 0.62 |
*Adjusted for gender, age, occupational category and waking wear time.
†Analyses adjusted for age, occupational category and waking wear time.
‡Analyses adjusted for age, gender and waking wear time.