| Socio-Demographic Characteristics | Group 1 n (%) | Group 2 n (%) | p value | 
| Average age (years) | 17.4 ± 0.7 | 27.7 ± 6.2 | <0.001 | 
| Marital Status ・ Single ・ Concubines ・ Married | 
 18 (13) 31 (22.3) 89 (64.4) | 
 12 (4.3) 72 (26.1) 192 (69.6) | <0.001 | 
| Level of education ・ Not schooled ・ Primary ・ Secondary ・ Superior | 
 57 (41.3) 48 (34.7) 32 (23.3) 1 (0,7) | 
 100 (36.3) 59 (21.4) 97 (35.1) 20 (7.2) | <0.001 | 
| Socio-economical level ・ Low ・ Middle ・ High | 
 91 (65.9) 45 (32.7) 2 (1.4) | 
 148 (53.6) 108 (39.2) 20 (7.2) | 0.0032 |