| | Variable | AG () | PG () | Total | P value |
| | Breastfeeding | | | | | | Previous experience, n (%) | | | | | | | | | Yes | 4 | (28,60) | 7 | (46,70) | 14 | (48,30) | 0,450* | | No | 10 | (71,40) | 8 | (53,30) | 15 | (51,70) | | Breastfeeding problems, n (%) | | | | | | | | | Yes | 1 | (7,10) | 3 | (20,00) | 4 | (13,80) | 0,598* | | No | 13 | (92,90) | 12 | (80,00) | 25 | (86,20) | | Galactogogue (protocol completed), n (%) | | | | | | | | | Yes | 6 | (42,90) | 6 | (40,00) | 14 | (48,30) | 1,000* | | No | 8 | (57,10) | 9 | (60,00) | 15 | (51,70) | | Exclusively breastfeeding at infant’s hospital discharge | | | | | | | | | Yes | 9 | (64,30) | 13 | (86,70) | 22 | (75,90) | 0,215* | | No | 5 | 35,70) | 2 | (13,30) | 7 | (24,10) | | Neonatal | | | | | | | | | Gender, n (%) | | | | | | | | | Female | 9 | (64,3) | 8 | (53,3) | 17 | (58,6) | | | Male | 5 | (35,7) | 7 | (46,7) | 12 | (41,4) | | | Size to gestational age, n (%) | | | | | | | | | Adequate | 9 | (64,3) | 12 | (80,0) | 21 | (72,4) | | | Small | 5 | (35,7) | 3 | (20,0) | 8 | (27,6) | | | Birth weight, mean (SD), min–max*, grams | 1046,79 (248,88) | 535–1335* | 1081,67 (229,98) | 620–1440* | 1064,83 (253,62) | 535–1440* | | | Gestational age, mean (SD), median* (min–max), weeks | 29,06 (2,42) | 24,86–34,00* | 28,86 (2,76) | 24,29–34,43* | 28,96 (2,56) | 24,29–34,43* | | | 1-minute Apgar score, mean (SD), min–max* | 5,21 (2,19) | 1–8* | 5,07 (2,60) | 1–9* | 5,15 (2,37) | 1–9* | | | 5-minute Apgar score mean (SD), min–max* | 7,64 (1,39) | 4–9* | 8,07 (0,96) | 7–10* | 7,86 (1,19) | 4–10* | | | Hospitalization period, mean (SD), min–max*, days | 64,43 (24,01) | 34–119* | 62,27 (35,28) | 29–174* | 63,31 (29,85) | 29–174* | |
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