Table 2 Menstrual patterns of nurses in non-shift (n = 139) and shift (n = 334) groups
From: Rotating shift work and menstrual characteristics in a cohort of Chinese nurses
Before | After | |||||||
|---|---|---|---|---|---|---|---|---|
Variables | Group | χ 2 | P-value | Group | χ 2 | P-value | ||
Non-shift | Shift | Non-shift | Shift | |||||
Dysmenorrhea | 92 (66.2) | 171 (51.2) | 8.933 | 0.003 | 103 (74.1) | 204 (61.1) | -- | 0.01* |
Mild | 53 (38.1) | 82 (24.6) | 4.651 | 0.098 | 61 (43.9) | 22 (6.6) | 81.458 | 0.000 |
Moderate | 27 (19.4) | 73 (21.9) | 32 (23.0) | 135 (40.4) | ||||
Heavy | 12 (8.6) | 16 (4.8) | 10 (7.2) | 47 (14.1) | ||||
Irregular menstrual cycle | 13 (9.7) | 52 (16.6) | 3.562 | 0.059 | 20 (14.9) | 78 (24.8) | 5.403 | 0.020 |
Regular menstrual cycle | ||||||||
≤ 24 days | 10 (8.3) | 10 (3.8) | 4.470 | 0.107 | 14 (12.3) | 26 (11.0) | 7.119 | 0.028 |
25–31 days | 99 (81.8) | 214 (81.7) | 89 (78.1) | 160 (67.8) | ||||
≥ 32 days | 12 (9.9) | 38 (14.5) | 11 (9.6) | 50 (21.2) | ||||
Amount of flow | ||||||||
Hypomenorrhea/reduction | 12 (8.6) | 42 (12.4) | 4.686 | 0.096 | 10 (7.2) | 42 (12.6) | 17.376 | 0.000 |
Moderate/No changes | 118 (84.9) | 254 (76.0) | 116 (83.5) | 215 (64.4) | ||||
Heavy/increase | 9 (6.5) | 38 (11.4) | 13 (9.6) | 77 (35.8) | ||||
Bleeding during menstrual cycle | 3 (2.2) | 8 (2.4) | 0.024 | 0.876 | 9 (6.5) | 37 (11.1) | 2.669 | 0.124 |