Table 3. Bivariate and multivariate analysis of the factors associated with EBF interruption in infants with up to 180 days of life. Porto Alegre, RS, Brazil, 2018.
| Variables | Bivariate HR (95% CI) |
p-value | Multivariate HR (95% CI) |
p-value |
|---|---|---|---|---|
| Vaginal delivery | 0.71 (0.51 - 0.98) | 0.039 | 0.84 (0.56 - 1.24) | 0.375 |
| Baby classification* | ||||
| AGA† | 1.00 | 1.00 | ||
| SGA‡ | 0.86 (0.46 - 1.59) | 0.621 | 1.01 (0.54 - 1.89) | 0.974 |
| BGA§ | 1.60 (0.98 - 2.60) | 0.059 | 1.49 (0.89 - 2.50) | 0.132 |
| White color | 1.01 (0.72 - 1.41) | 0.976 | - | - |
| Maternal age | ||||
| < 20 years old | 0.94 (0.62 - 1.42) | 0.767 | 0.92 (0.57 - 1.46) | 0.711 |
| 20 to 34 years old | 1.00 | 1.00 | ||
| ≥ 35 years old | 181 (1.10 - 2.97) | 0.019 | 1.73 (1.03 - 2.90) | 0.037 |
| Having a partner | 0.95 (0.59 - 1.54) | 0.844 | - | - |
| Living with | ||||
| Partner | 1.41 (0.66 - 3.02) | 0.381 | - | - |
| Mother | 0.86 (0.58 - 1.28) | 0.460 | - | - |
| Mother-in-law | 0.93 (0.54 - 1.60) | 0.804 | - | - |
| Family income | ||||
| < 2 minimum wages | 1.18 (0.76 - 1.84) | 0.460 | - | - |
| 2 to 4 minimum wages | 1.07 (0.72 - 1.59) | 0.726 | - | - |
| > 4 minimum wages | 1.00 | - | - | |
| Years of complete schooling of the woman | ||||
| < 8 years | 0.97 (0.65 - 1.46) | 0.898 | - | - |
| ≥ 8 years | 1.00 | - | - | |
| Years of complete schooling of the partner | ||||
| < 8 years | 1.13 (0.62 - 2.08) | 0.689 | - | - |
| ≥ 8 years | 1.00 | - | - | |
| Working outside the home | 1.01 (0.73 - 1.40) | 0.954 | - | - |
| Maternity leave (months) | 0.99 (0.92 - 1.06) | 0.673 | - | - |
| PN consultations|| | 0.97 (0.61 - 1.5) | 0.890 | - | - |
| < 6 consultations | 1.35 (0.78 - 2.36) | 0.288 | - | - |
| ≥ 6 consultations | 1.00 | - | - | |
| Information on BF¶ in the PN|| or in the group of pregnant women | 0.60 (0.15 - 2.49) | 0.483 | - | - |
| Smoking during pregnancy | 1.68 (1.09 - 2.59) | 0.019 | 1.66 (1.05 - 2.61) | 0.029 |
| Drug use during pregnancy | 2.07 (0.51 - 8.39) | 0.311 | - | - |
| BF time¶ last child | ||||
| Primiparous | 1.14 (0.67 - 1.93) | 0.635 | 1.18 (0.67 - 2.06) | 0.568 |
| < 6 months | 1.92 (1.05 - 3.50) | 0.033 | 1.37 (0.75 - 2.49) | 0.314 |
| ≥ 6 months | 1.00 | |||
| Dairy complement in the hospital | 1.57 (1.13 - 2.19) | 0.007 | 1.34 (0.94 - 1.92) | 0.107 |
| Maternity leave at 15 days | 0.95 (0.68 - 1.32) | 0.756 | - | - |
| Fixed time for BF¶ | 1.08 (0.74 - 1.59) | 0.681 | - | - |
| Pacifier use during follow-up | 1.99 (1.38 - 2.87) | < 0.001* | 1.76 (1.21 - 2.58) | 0.003 |
| Difficulty in BF¶ in hospitalization | 0.96 (0.30 - 3.00) | 0.939 | - | - |
| Difficulty in BF¶ after hospital discharge | 2.48 (1.54 - 3.98) | < 0.001* | 2.09 (1.29 - 3.41) | 0.003 |
| Sought professional assistance due to breastfeeding difficulties** | 2.93 (2.10 - 4.09) | < 0.001* | 2.45 (1.69 - 3.54) | < 0.001 |
*
According to Lubchenco's Curve( 14 );
†
AGA = Adequate for gestational age;
‡
SGA = Small for gestational age;
§
BGA = Big for gestational age;
||
PN = Prenatal;
¶
BF = Breastfeeding;
**
Human Milk Bank, outpatient lactation consulting, primary health care