Table 1.
Sociodemographic and Clinical Variables
| Sociodemographic Factors | Active tDCS | Sham tDCS | p Value |
|---|---|---|---|
| Age (years) | 26.1 ± 3.8 | 21.0 ± 2.1 | 0.001 |
| NRS | 5.07 ± 0.47 | 4.54 ± 0.65 | 0.507 |
| BMI | 23.7 ± 3.9 | 21.8 ± 3.5 | 0.21 |
| Menstrual cycle (days) | 26.8 ± 2.2 | 28.8 ± 1.7 | 0.03 |
| NRS | 5.07 ± 0.47 | 4.54 ± 0.65 | 0.50 |
| HAS | 19.46 ± 1.9 | 19.45 ± 2.4 | 0.99 |
| PA | 21.92 ± 1.8 | 18.09 ± 0.9 | 0.09 |
| NA | 18.62 ± 1.4 | 13.55 ± 0.84 | 0.007 |
| 6MWT | 503.4 ± 33.4 | 529.1 ± 13.90 | 0.51 |
| Number of pregnancies (n) | 0.27 | ||
| Nulliparous | 76.9% (10) | 90.9% (10) | |
| 1 Pregnancy | 0 | 9.1% (1) | |
| 2 Pregnancy | 15.4% (2) | 0 | |
| 3 Pregnancy | 7.7% (1) | 0 | |
| ≥ 4 Pregnancy | 0 | 0 | |
| Marital status (n) | 0.902 | ||
| Never married | 92.3% (12) | 90.9% (10) | |
| Married | 7.7% (1) | 9.1% (1) | |
| Income* (n) | 0.361 | ||
| 1 Minimum wage | 15.4% (2) | 45.5% (5) | |
| 2 to 3 Minimum wage | 46.2% (6) | 36.4% (4) | |
| 4 Minimum wage or more | 30.8% (4) | 18.2% (2) | |
| Unreported | 7.7% (1) | 0 |
Notes: Clinical variables are shown as mean ± SD. Baseline data were assessed on the first day of menstruation over the first menstrual cycle. *Brazilian National Minimum Wage, US$252.14 per month.
Abbreviations: NRS, numeric rating scale; PA, positive affect; NA, negative affect; HAS, Hamilton Anxiety Scale; 6MWT, Six-Minute Walk Test.