Table 1. The Variables in Intervention and Placebo Groups.
| Variable | Intervention | Placebo | Value c | P value |
|---|---|---|---|---|
| Age, Mean (SD), y a | 20.97 (2.07) | 22.16 (2.63) | -1.75 | 0.08 |
| Age at menarche, Mean (SD), y a | 13.26 (1.03) | 13.4 (1.59) | -0.33 | 0.74 |
| Menses duration, Mean (SD), d a | 6.63 (1.34) | 6.4 (1.06) | -0.6 | 0.55 |
| Body Mass , Mean (SD), Kg/m 2 | 21.8 (2.81) | 20.88 (1.98) | -1.16 | 0.25 |
| Marriage, No. (%) b | 0.72 | 0.52 | ||
| Single | 34 (89.5) | 34 (91.9) | ||
| Married | 4 (10.5) | 3 (8.1) | ||
| Education No. (%) b | 1.55 | 0.46 | ||
| License | 16 (42.1) | 14 (37.8) | ||
| Master Degree | 5 (13.2) | 9 (24.3) | ||
| Doctorate | 17 (44.7) | 14 (37.8) |
a The differences of the means were analyzed by Mann-Whitney U test and the value represents the Z.
b The differences of frequencies were analyzed by chi-square test.
c The value represents Z value in quantitative variables and Chi-square in categorical variables.