Age group | 1–2 mo | 3–4 mo | 5–6 mo | 8–9 mo | 11–12 mo | Overall | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
I | F | I | F | I | F | I | F | I | F | I | F | |
Number | 151 | 105 | 132 | 102 | 146 | 111 | 90 | 63 | 79 | 56 | 598 | 437 |
Exclusive BF | 48 (31.8%) | 28 (26.7%) | 25 (18.9%) | 17 (16.7%) | 23 (15.8%) | 19 (17.1%) | 2 (2.2%) | 5 (7.9%) | 3 (3.8%) | 3 (5.4%) | 101 (16.9%) | 72 (16.5%) |
Partial BF | 19 (12.6%) | 15 (14.3%) | 17 (12.9%) | 15 (14.7%) | 6 (4.1%) | 9 (8.1%) | 4 (4.4%) | 3 (4.8%) | 2 (2.5%) | 4 (7.1%) | 48 (8.0%) | 46 (10.5%) |
Formula | 83 (55.0%) | 61 (58.1%) | 82 (62.1%) | 69 (67.6%) | 38 (26.0%) | 80 (72.1%) | 21 (23.3%) | 53 (84.1%) | 13 (16.5%) | 46 (82.1%) | 238 (39.8%) | 309 (70.7%) |
CM | 1 (0.7%) | 1 (1.0%) | 8 (6.1%) | 1 (1.0%) | 79 (54.1%) | 2 (1.8%) | 63 (70%) | 0 (0.0%) | 61 (77.2%) | 2 (3.6%) | 211 (38.5%) | 6 (1.4%) |
p | NS | NS | < 0.0001 | < 0.0001 | < 0.0001 | < 0.0001 |