Table 2. Linear regression analysis of factors associated with faecal IgA at four weeks of age.
| Factors | Univariate | Multivariate | ||
|---|---|---|---|---|
| PRC (95% CI) | p-value | PRC (95% CI) | p-value | |
| Group (BbF group) | 188.3 (2.5, 374.0) | 0.047 | 191.8 (4.1, 379.4) | 0.04 |
| Sex (male) | 187.4 (1.6, 373.2) | 0.048 | 159.9 (−23.4, 343.3) | NS |
| Caesarean delivery | 168.4 (−129.4, 466.2) | NS | 171.9 (−143.6, 487.5) | NS |
| Gestational age | 5.5 (−10.7, 21.8) | NS | 0.5 (−15.6, 16.6) | NS |
| Weight at birth | −0.1 (−0.4, 0.2) | NS | −0.1 (−0.4, 0.2) | NS |
| Height at birth | 35.8 (−23.9, 95.5) | NS | 29.5 (−33.0, 91.9) | NS |
| Head circumference at birth | 7.5 (−55.6, 70.7) | NS | 3.9 (−52.7, 65.0) | NS |
| Apgar score at 5 min | 12.4 (−128.5, 153.3) | NS | 11.3 (−130.8, 153.5) | NS |
| Maternal age | 21.1 (2.8, 39.4) | 0.03 | 21.5 (3.4, 39.6) | 0.03 |
| Maternal history of allergy | 42.8 (−188.1, 273.8) | NS | −14.7 (−250.6, 221.2) | NS |
| Parity | 74.4 (−39.2, 187.9) | NS | −0.3 (−128.1, 127.5) | NS |
| Log (Bifidobacterium) at four weeks of age | 24.4 (−16.9, 65.7) | NS | 20.7 (−20.4, 61.9) | NS |
| IgA in breast milk at four weeks of age | −0.08 (−0.17, 0.01) | NS | −0.04 (−0.13, 0.06) | NS |
| Formula intake at four weeks of age | −0.30 (−0.69, 0.03) | NS | −0.22 (−0.54, 0.10) | NS |
BbF: infant formula containing non-live B. bifidum OLB6378; PRC: partial regression coefficient; CI: confidence interval. The multivariate was adjusted for group, maternal age, and gestational age.