Table 1 Comparison of demographic variables between the PP and No PME groups
|  | PP (n = 284)1 | No PME (n = 268)1 | PP versus No PME | |
|---|---|---|---|---|
χ2 or z-score | P-value | |||
Method of recruitment, n (%) | ||||
 Systematic | 71 (25.4) | 109 (41.0) |  |  |
 Non-systematic | 208 (74.6) | 157 (59.0) | 14.85 | < 0.001 |
Age at interview, years | ||||
 Median | 47 | 53 |  |  |
 IQR (range) | 15 (21–79) | 16 (24–76) | −5.13 | < 0.001 |
Highest educational attainment, n (%) | ||||
 No higher education | 143 (53.6) | 168 (64.1) |  |  |
 Higher education | 124 (46.4) | 94 (35.9) | 6.10 | 0.014 |
Highest occupation, n (%) | ||||
 Professional | 157 (56.7) | 124 (48.3) |  |  |
 Non-Professional | 115 (41.5) | 128 (49.8) | 3.83 | 0.15 |
 Never worked | 5 (1.8) | 5 (1.9) |  |  |
Marital history, n (%) | ||||
 Married/lived as married | 274 (96.8) | 256 (95.9) |  |  |
 Never married/lived as married | 9 (3.2) | 11 (4.1) | 0.35 | 0.56 |