Table 1.
UK Biobank participants’ characteristics by current night shift work exposure
| Variables | Current work schedule | P value | ||
|---|---|---|---|---|
| Never/rarely night shifts (n = 256,605) |
Some night shifts (n = 13,857) |
Usual/permanent night shifts (n = 10,818) |
||
| Male (%) | 46.63 | 62.08 | 62.22 | < 0.001 |
| Age (years) | 52.9 ± 7.09 | 51.19 ± 6.86 | 51.31 ± 6.81 | < 0.001 |
| White (%) | 94.56 | 87.58 | 86.65 | < 0.001 |
| Townsend deprivation index | -1.43 ± 2.96 | -0.55 ± 3.31 | -0.42 ± 3.31 | < 0.001 |
| College or university degree (%) | 39.16 | 23.68 | 15.31 | < 0.001 |
| Household income (£) | < 0.001 | |||
| < 18,000 | 9.13 | 11.64 | 12.99 | |
| 18,000 to 30,999 | 19.3 | 23.8 | 27.54 | |
| 31,000 to 51,999 | 28.06 | 30.4 | 31.87 | |
| 52,000 to 100,000 | 26.34 | 19.56 | 15.46 | |
| > 100,000 | 7.04 | 3.95 | 1.58 | |
| Physical activity (%) | < 0.001 | |||
| Inadequate | 16.82 | 10.7 | 9.61 | |
| Moderate | 42.81 | 32.59 | 29.07 | |
| Vigorous | 23.24 | 35.18 | 36.67 | |
| Smoking status (%) | < 0.001 | |||
| Never | 57.91 | 52.93 | 52.81 | |
| Previous | 31.98 | 30.78 | 30.14 | |
| Current | 10.11 | 16.29 | 17.05 | |
| Alcohol consumption (%) | < 0.001 | |||
| Never or special occasions only | 15.57 | 20.36 | 24.17 | |
| 1 to 3 times/month | 11.68 | 13.16 | 14.27 | |
| 1 to 4 times/week | 52.58 | 50.05 | 49.75 | |
| Daily or almost daily | 20.17 | 16.42 | 11.81 | |
| Body mass index (kg/m2) | 27.15 ± 4.67 | 28.19 ± 4.89 | 28.41 ± 4.9 | < 0.001 |
| Hypertension (%) | 46.95 | 49.83 | 51.12 | < 0.001 |
| Diabetes (%) | 4.04 | 5.50 | 6.25 | < 0.001 |
Values are the mean (± standard deviation, SD) or percentage (%) and were examined by one-way ANOVA or chi-square test