| Excluded N = 707 | Included N = 527 | P value |
---|---|---|---|
Age | 31.3 (5.7) | 30.3 (5.9) | 0.301 |
Socioeconomic status | Â | Â | <0.0012 |
 Low | 78 (12.7) | 117 (22.9) |  |
 Middle | 432 (70.5) | 358 (70.1) |  |
 High | 103 (16.8) | 36 (7) |  |
Number of pregnancy | Â | Â | 0.702 |
 1 | 233 (37.8) | 212 (41.2) |  |
 2 | 218 (35.3) | 173 (33.7) |  |
 3 | 112 (18.2) | 87 (16.9) |  |
 >3 | 54 (8.8) | 42 (8.2) |  |
Working mother | 213 (34.6) | 152 (29.7) | 0.082 |
Blue-collar job | 49 (23.9) | 55 (37.7) | 0.0062 |
Previous breastfeeding | 310 (43.8) | 248 (47.1) | 0.142 |