Table 1.
Demographic characteristics of nurses with different kinds of night work load
| Number of nights worked last year | |||
|---|---|---|---|
| 0 (n = 568) | 1-30 (n = 860) | >30 (n = 631) | |
| Age (n = 2057) | 34.9 (34.2-35.6) | 32.4 (31.8-32.9) | 32.4 (31.8-33.0) |
| Gender (% female) (n = 2049) | 92.6 % (90.4-94.7) | 92.5 % (90.7-94.3) | 86.3 % (83.6-89.0) |
| Hours Worked Per Week (n = 2017) | 34.0 (33.4-34.6) | 33.7 (33.2-34.1) | 34.2 (33.6-34.7) |
| Average hours Sleep per Night (n = 2048) | 6.9 (6.8-7.0) | 6.9 (6.8-7.0) | 7.0 (6.9-7.0) |
| Worked Schedule including Night Work (% > 5 years) (n = 1750) | 26.7 % (21.8-31.5) | 29.5 % (26.4-32.7) | 43.5 % (39.6-47.5) |
| Sweaty Excercise (% > 1 hour per week) (n = 1971) | 64.1 %(60.0-68.1) | 67.4 % (64.2-70.1) | 65.7 % (61.2-69.5) |
| BMI (n = 2038) | 24.4 (24.0-24.7) | 24.1 (23.9-24.4) | 24.8 (24.4-25.1) |
| Obesity (n = 2038) | 10.0 % (7.6-12.6) | 6.6 % (4.9-8.3) | 11.7 % (9.2-14.3) |
| AUDIT-C (n = 2021) | 3.3 (3.2-3.5) | 3.7 (3.6-3.8) | 3.8 (3.7-4.0) |
| Caffeine Containing Drinks per Day (n = 2050) | 3.2 (3.0-3.5) | 2.8 (2.7-3.0) | 3.2 (3.0-3.4) |
| Daily Smokers (n = 1956) | 12.9 % (10.1-15.7) | 9.7 % (7.7-11.7) | 10.7 % (8.8-13.2) |
| Cigarettes per day among daily smokers (n = 214) | 10.0 (8.6-11.4) | 9.0 (7.9-10.1) | 9.1 (7.9-10.3) |
Confidence Intervals 95 % in parenthesis. BMI body mass index. Obesity defined as BMI >30. AUDIT-C = The AUDIT alcohol consumption questions