Table 1.
Demographic characteristics and effective variables of menstrual cycle of all 406 under study workers
| Variable | Day time workers (N=293) | Shift workers (N=113) | P-value |
|---|---|---|---|
| Age (year) Mean (SD) | 31.3 (4.9) | 31.5 (5.3) | 0.720 |
| Work of duration (year) Mean (SD) | 8.9(4.9) | 8.3 (4.9) | 0.307 |
| Body mass index (kg/m2) Mean (SD) | 23.9 (3.4) | 23.3 (3.2) | 0.096 |
| Age of menarche (year) Mean (SD) | 12.6 (1.3) | 12.7 (1.2) | 0.359 |
| Marital status N (%) | |||
| Single | 40 (13.6) | 14 (12.4) | 0.166 |
| Married | 246 (83.9) | 92 (81.5) | |
| Divorced/Separated | 7 (6.1) | 7 (2.5) | |
| Pregnancy history Yes (%) | 211 (72.0) | 65 (57.5) | 0.034 |
| Use of OCP Yes (%) | 45 (15.3) | 17 (15.0) | 0.756 |
| Educational levels N (%) | |||
| Guidance and high school a | 115 (39.3) | 47 (41.6) | 0.183 |
| High school graduate b | 166 (56.6) | 61 (53.9) | |
| Associate degree c | 12 (4.1) | 5(4.5) | |
| Tea consumption Yes (%) | 168 (57.3) | 63 (55.7) | 0.731 |
| Regular exercise Yes (%) | 44 (15.0) | 20 (17.6) | 0.300 |
| Standing duration (>3 h) Yes (%) | 61(20.8) | 25 (22.1) | 0.342 |
| Heavy lifting (>10 kg) Yes (%) | 15 (5.1) | 6 (5.3) | 0.561 |
| Perceived job satisfaction N (%) | |||
| Low | 155 (52.9) | 51 (45.2) | 0.136 |
| Medium | 94 (32.0) | 36 (31.8) | |
| High | 44 (15.1) | 26 (23.0) | |
| Perceived job stress N (%) | |||
| None | 20 (6.8) | 6 (5.4) | |
| Low | 96 (32.7) | 33 (29.2) | 0.496 |
| Medium | 126 (43.1) | 58 (51.3) | |
| High | 51 (17.4) | 16 (14.1) |
a
Between 8-12 years of education in school
b
At least 12 years of education in school
c
An educational level between High school graduate and Bachelor of Science (at least 2 years of education in university)