Table 3.
Comparison of Factors Relevant to Lactation Between Two Groups
| Variables | Cases [n (%)] | Controls [n (%)] | P value |
|---|---|---|---|
| Nipple discharge (n=1144; 130)* | <0.01 | ||
| Yes | 497 (43.44) | 23 (17.69) | |
| No | 647 (56.56) | 107 (82.31) | |
| Nipple invagination (n=1144; 130) | <0.01 | ||
| Yes | 355 (31.00) | 6 (4.62) | |
| Grade I | 201 (17.57) | 5 (3.85) | |
| Grade II | 109 (9.53) | 1 (0.77) | |
| Grade III | 45 (3.93) | 0 (0) | |
| None | 789 (69.00) | 124 (95.38) | |
| Breastfeeding (n=1100; 124) | 0.90 | ||
| Yes | 698 (63.45) | 78 (62.90) | |
| No | 402 (36.55) | 46 (37.10) | |
| Lactation time (months), (n=698; 78) | 0.44 | ||
| Left breast | 11.2 ± 7.97 | 11.51 ± 9.58 | |
| Right breast | 11.46 ± 8.21 | 10.49 ± 7.38 | |
| Prolactin level (n=1144; 130) | <0.01 | ||
| Above normal | 75 (6.56) | 1 (0.77) | |
| Normal or unknown | 1069 (93.44) | 129 (99.23) | |
| Psychotropic drug intake (n=1144;130) | <0.01 | ||
| Yes | 21 (1.84) | 1 (0.77) | |
| No | 1123 (98.16) | 129 (99.23) |
Note: *Indicates (number of cases; number of controls).