Table 1. Comparison of demographics and clinical symptoms between PDM patients and healthy controls.
| Items | PDM (Mean ± SD) | HCs (Mean ± SD) | p-value |
|---|---|---|---|
| Age(year) | 22.6 ± 1.1 | 22.3 ± 1.8 | – |
| Body mass index | 21.8 ± 1.8 | 21.7 ± 1.6 | – |
| Onset of menses (year) | 12.5 ± 1.2 | 12.7 ± 1.3 | – |
| Length of menstrual phase (day) | 3–7 | 3–7 | – |
| Duration of dysmenorrhea (year) | 6.3 ± 2.5 | – | – |
| MPQ | 22.0 ± 9.6 | 0 | <0.001 |
| RSS | 34.6 ± 16.8 | 5.7 ± 2.1 | <0.001 |
| SAS | 30.1 ± 5.9 | 25.2 ± 6.6 | <0.005 |
| SDS | 31.6 ± 8.5 | 25.4 ± 5.5 | <0.001 |
Abbreviations: SD, standard deviation; PDM, primary dysmenorrheal; HCs, healthy controls; RSS, Cox retrospective symptom scale; MPQ, McGill pain questionnaire; SAS, self-rating anxiety scale; SDS, self-rating depression scale.