Table 1. Demographic data and baseline information.
| PDM (n = 61) | Control (n = 65) | p Value | ||||
|---|---|---|---|---|---|---|
| Group | Genotype | Pain | Interaction | |||
| Age, year | ||||||
| AA homozygotes | 22.4 (2.61) | 23.2 (1.64) | 0.087 | 0.408 | NA | NA |
| G allele carriers | 23.0 (2.04) | 24.2 (2.68) | ||||
| Years of menstruating | ||||||
| AA homozygotes | 11.3 (2.69) | 10.5 (1.49) | 0.484 | 0.325 | NA | NA |
| G allele carriers | 10.9 (2.60) | 12.0 (3.16) | ||||
| Days of one menstrual cycle | ||||||
| AA homozygotes | 29.4 (1.55) | 29.5 (1.25) | 0.546 | 0.760 | NA | NA |
| G allele carriers | 29.5 (1.48) | 29.5 (1.53) | ||||
| Edinburgh Handedness | ||||||
| AA homozygotes | 82.5 (17.63) | 85.6 (14.35) | 0.643 | 0.291 | NA | NA |
| G allele carriers | 82.0 (17.81) | 77.3 (20.53) | ||||
| Mnemonic PRI scores* | ||||||
| AA homozygotes | 34.7 (12.75) | NA | NA | 0.531 | 0.039 | 0.300 |
| G allele carriers | 35.0 (14.88) | NA | ||||
| Present PRI scores* | ||||||
| AA homozygotes | 29.5 (12.94) | NA | ||||
| G allele carriers | 33.2 (13.04) | NA | ||||
Normality was tested for all assessments, and only the PRI scores in the McGill Pain Questionnaire were normality (p > 0.05). The data are presented as the means (SD). NA, not applicable.
*Four subjects with primary dysmenorrhea (PDM; 3 AA homozygotes, 1 G allele carrier) did not complete the pain rating index (PRI) of the McGill Pain Questionnaire and were excluded from these calculations.