Reported absenteeism caused by menstruation-related symptoms
| Number (percentage) | Mean±SD | |
| All (n=32 748) | ||
| Absenteeism | 4514 (13.8) | |
| ≤0.5 day | 538 (1.6) | |
| 1 day | 2259 (6.9) | |
| 2 days | 1171 (3.6) | |
| 3 days | 349 (1.1) | |
| >3 days | 184 (0.6) | |
| Total days of absenteeism per year | 1.3±5.9 | |
| Work (n=26 104) | ||
| Absenteeism | 2926 (11.2) | |
| ≤0.5 day | 374 (1.4) | |
| 1 day | 1476 (5.7) | |
| 2 days | 757 (2.9) | |
| 3 days | 211 (0.8) | |
| >3 days | 98 (0.4) | |
| Total days of absenteeism per year | 0.9±3.9 | |
| Study (n=8764) | ||
| Absenteeism | 1715 (19.6) | |
| ≤0.5 day | 234 (2.7) | |
| 1 day | 921 (10.5) | |
| 2 days | 423 (4.8) | |
| 3 days | 92 (1.0) | |
| >3 days | 41 (0.5) | |
| Total days of absenteeism per year | 1.6±5.0 |
Women were asked to report the average amount of days on which they were absent due to menstruation-related symptoms per cycle. The total days of absenteeism per year was calculated. The added numbers of women in the work and study group exceed the total amount of participants, since 2120 women reported to both study and work more than 5 hours/week.