Table 1.
Demographic and clinical characteristics of PMDD and control subject groups completing hormone sampling and between-group comparison
| Measure | PMDD | Control | P value |
|---|---|---|---|
| n | 68 | 47 | |
| Age (yr) | 29.5 ± 6.1 (28.0–31.0) | 27.9 ± 6.0 (26.1–29.7) | 0.17 |
| Age at menarche | 12.9 ± 1.2 (12.6–13.2) | 12.6 ± 1.2 (12.2–12.9) | 0.14 |
| No. of Caucasians (%) | 49/68 (72) | 35/47 (77) | 0.59 |
| Height (m) | 1.66 ± 0.06 (1.65–1.68) | 1.65 ± 0.07 (1.63–1.70) | 0.32 |
| Weight (kg) | 63.8 ± 13.0 (60.7–66.9) | 62.0 ± 9.3 (59.3–64.8) | 0.40 |
| BMI (kg/m2) | 23.1 ± 4.8 (21.9–24.2) | 22.5 ± 3.7 (21.4–23.6) | 0.50 |
| Years PMS symptoms | 10.8 ± 6.2 (9.3–12.3) | N/A | |
| Menstrual cycle length (d) | 28.8 ± 2.8 (28.1–29.5) | 28.4 ± 2.5 (27.6–29.1) | 0.45 |
| PMDD symptom median | |||
| Luteal phase | 21.2 ± 10.3 (18.70–23.65) | 1.0 ± 1.5 (0.60–1.49) | |
| Menstrual phase | 14.9 ± 10.5 (12.37–17.46) | 1.1 ± 1.1 (0.79–1.46) | |
| Intermenstrual phase | 1.89 ± 3.8 (0.97–2.81) | 0.3 ± 0.5 (0.13–0.45) |
Values are expressed as mean ± sd (95% confidence interval) or number (%) within group. The Student’s t test comparison of differences between-group means for continuous measures and Fisher’s exact test comparison of differences between-group proportions for categorical measures were performed. BMI, Body mass index; N/A, not applicable.