Table 2. Distribution of 88 PMDD cases and 176 age-matched controls according to social, anthropometric and gynecological variables.
| Characteristics | Category | N° cases | % | N° controls | % |
|---|---|---|---|---|---|
| Body mass index (Kg/m2)* | <19 | 8 | 9.6 | 9 | 5.4 |
| 19–24.9 | 56 | 67.5 | 108 | 65.1 | |
| 25–30 | 14 | 16.9 | 35 | 21.1 | |
| >30 | 5 | 6.0 | 14 | 8.4 | |
| Educational level* | primary | 18 | 20.9 | 31 | 17.6 |
| secondary | 23 | 26.7 | 72 | 40.9 | |
| university | 45 | 52.3 | 73 | 41.5 | |
| Menarche age | <= 11 | 21 | 23.9 | 27 | 15.3 |
| 12 y 13 | 50 | 56.8 | 98 | 55.7 | |
| >= 14 | 17 | 19.3 | 51 | 29.0 | |
| Number of pregnancies | 0 | 47 | 53.4 | 74 | 42.0 |
| 1 | 18 | 20.5 | 48 | 27.3 | |
| > 1 | 23 | 26.1 | 54 | 30.7 | |
| Number of abortions | 0 | 69 | 78.4 | 147 | 83.5 |
| 1 | 13 | 14.8 | 24 | 13.6 | |
| > 1 | 6 | 6.8 | 5 | 2.8 | |
| Oral contraception* | no | 57 | 80.3 | 112 | 80.0 |
| yes | 14 | 19.7 | 28 | 20.0 | |
| Intrauterine device* | no | 72 | 93.5 | 147 | 93.0 |
| yes | 5 | 6.5 | 11 | 7.0 |
*The sum of different categories is < the total number of cases or controls due to partial missing data