Table 1 Characteristics of the case and control groups
From: Major dietary patterns in relation to menstrual pain: a nested case control study
Variables | Cases (n = 46) | Controls (n = 54) | P-valuea |
|---|---|---|---|
Age (y) (Mean ± SD) | 21.89 ± 1.43 | 21.92 ± 1.83 | 0.41 |
Age at menarche (y) (Mean ± SD) | 13.43 ± 1.47 | 13.61 ± 1.43 | 0.28 |
Length of menstrual cycle (days) | 28.63 ± 1.92 | 28.44 ± 3.23 | 0.19 |
Menstrual cycle regularity, n (%) | 0.49 | ||
Yes | 46 (46.9) | 52 (53.1) | |
No | 0 | 2 (100) | |
Bleeding length (days) | 5.52 ± 1.5 | 5.19 ± 1.1 | 0.09 |
Severity of menstrual flow, n (%) | 0.01 | ||
Low | 0 | 3 (100) | |
Moderate | 30 (41.7) | 42 (58.3) | |
Severe | 16 (64) | 9 (36) | |
Family history of dysmenorrhea, n (%) | < 0.001 | ||
Yes | 41 (56.9) | 31 (43.1) | |
No | 5 (17.9) | 23 (82.1) | |
Physical activity level, n (%) | 0.71 | ||
Low | 11 (47.8) | 12 (52.2) | |
Moderate | 27 (48.2) | 29 (51.8) | |
High | 8 (38.1) | 13 (61.9) | |
Depression-anxiety levels, n (%) | 0.02 | ||
Normal | 9 (30) | 21 (70) | |
Mild | 24 (49) | 25 (51) | |
Moderate | 8 (80) | 2 (20) | |
Severe | 5 (45.5) | 6 (54.5) | |
BMI (kg/m2), (Mean ± SD) | 21.71 ± 2.69 | 21.59 ± 2.39 | 0.4 |
Daily energy intake (Kcal), (Mean ± SD) | 2655.20 ± 822.39 | 2706.99 ± 892.50 | 0.59 |