Table 3 Age-adjusted association between rotating shift work and menstrual cycle
From: Rotating shift work and menstrual characteristics in a cohort of Chinese nurses
Variables | Menstrual cycle length ≤ 24c | Menstrual cycle length ≥ 32cb |
|---|---|---|
n = 26 | n = 48 | |
OR 95 % CI | OR 95 % CI | |
Shift work duration (months) | ||
0a | 1.00 | 1.00 |
1–9 | 0.88 (0.72–0.91) | 1.02 (0.93-1.05) |
10–19 | 1.13 (0.84–1.62) | 1.25 (0.94-1.31) |
20+ | 0.97 (0.83–1.29) | 1.08 (0.76-1.47) |
Frequency of evening work/month | ||
0a | 1.00 | 1.00 |
1–3 | 0.76 (0.54–1.06) | 0.43 (0.35-0.56) |
4–6 | 1.01 (0.92–1.47) | 1.26 (0.83-1.57) |
7+ | 0.92 (0.97–1.25) | 1.04 (0.86-1.19) |
Frequency of night work/month | ||
0a | 1.00 | 1.00 |
1–3 | 0.76 (0.53–0.92) | 0.49 (0.31-0.72) |
4–6 | 1.48 (0.77–1.91) | 1.44 (0.69-1.82) |
7+ | 1.76 (1.32–2.28) | 0.91 (0.85-0.98) |
Age (years) | ||
21–30 | 0.34 (0.29–0.51) | 1.27 (1.20-1.34) |
31–35 | 0.60 (0.52–0.93) | 1.05 (0.92-1.15) |
36–40a | 1.00 | 1.00 |
41–46 | 1.76 (1.02–2.04) | 0.53 (0.49-0.61) |
BMI (kg/m2) | ||
<18.5 | 1.22 (0.70-2.36) | 1.79 (1.63-1.94) |
18.5-24.9a | 1.00 | 1.00 |
25-29.9 | 1.06 (0.81-1.74) | 1.18 (1.06-1.26) |
30-35 | 2.03 (0.75-3.97) | 1.24 (1.09-1.43) |
Perceived job satisfaction | ||
High | 0.58 (0.30-0.79) | 0.83 (0.67-0.87) |
Mediuma | 1.00 | 1.00 |
Low | 2.11 (0.94-3.69) | 1.74 (0.94-1.82) |