Table 1. Comparison of some demographic characteristics in groups.
| Variable | Evening primrose oil group | Placebo group | Test statistics | P value |
|---|---|---|---|---|
| Age (y) | 54.7 ± 4.8 | 55.9 ± 5.2 | –1.51 | 0.13a |
| Age of the onset of menopause (y) | 48.6 ± 5.3 | 50.1 ± 4.8 | –1.07 | 0.28b |
| Duration of menopause (y) | 6.0 ± 5.9 | 7.0 ± 5.0 | –1.63 | 0.10b |
| Parity | 3 (3, 5) | 4 (3, 5) | –0.54 | 0.59a |
| No. of children alive | 3 (2, 4) | 4 (3, 5) | 0.22 | 0.82a |
| Education | 0.89 | 0.93c | ||
| Illiterate | 16 (18.8) | 14 (16.9) | ||
| Primary | 34 (40.0) | 33 (39.8) | ||
| High school | 15 (17.6) | 18 (21.7) | ||
| Diploma | 15 (17.6) | 15 (18.1) | ||
| Academic | 5 (5.9) | 3 (3.6) | ||
| Occupation | 0.38 | 0.53c | ||
| Employed | 5 (6.0) | 7 (8.4) | ||
| Unemployed | 79 (94.0) | 76 (91.6) | ||
| Body mass index | 0.46 | 0.79c | ||
| 18.5–24.9 kg/m2 | 17 (20.0) | 16 (19.5) | ||
| 25–29.9 kg/m2 | 49 (57.6) | 44 (53.7) | ||
| ≥ 30 kg/m2 | 19 (22.4) | 22 (26.8) |
Data are presented as mean ± standard deviation, median (Q1, Q3), or number (%).
In the variables with total number less than 85, there was missing data and the participants did not answer the question.
BMI: body mass index.
aIndependent t-test; bMann–Whitney; cchi-square test.