Factors associated with early discharge among infants born in five maternity units in the Northern Region of the UK during 1998
| Variable | Univariate | Multivariate* | ||||
|---|---|---|---|---|---|---|
| n | Odds ratio (95% CI) | Likelihood ratio test p value | n | Odds ratio† (95% CI) | Likelihood ratio test p value | |
| *6118 subjects had full information for all variables in the multivariate model. | ||||||
| †Odds ratios adjusted for all other variables in multivariate model. | ||||||
| ‡There were no early discharges in those receiving a caesarean section. | ||||||
| §Maternity unit 5 was removed due to insufficient data. | ||||||
| Unit of delivery | 11338 | <0.0001 | <0.0001 | |||
| Hospital 1 | 3217 | 1 | 1902 | 1 | ||
| Hospital 2 | 1763 | 1.56 (1.39 to 1.75) | 1481 | 2.08 (1.75 to 2.46) | ||
| Hospital 3 | 840 | 0.81 (0.69 to 0.95) | 644 | 0.78 (0.63 to 0.97) | ||
| Hospital 4 | 2467 | 0.99 (0.89 to 1.11) | 2091 | 1.13 (0.96 to 1.31) | ||
| Hospital 5 | 3051 | 1.00 (0.91 to 1.11) | –§ | |||
| Mode of delivery | 9974 | <0.0001 | <0.0001 | |||
| Normal vaginal | 8565 | 1 | 5152 | 1 | ||
| Assisted vaginal | 1409 | 0.21 (0.18 to 0.24) | 966 | 0.50 (0.42 to 0.61) | ||
| Caesarean section | –‡ | |||||
| Gestation (weeks) | 8157 | <0.0001 | 0.001 | |||
| 35–37 | 595 | 0.62 (0.52 to 0.74) | 348 | 0.65 (0.49 to 0.86) | ||
| 38–40 | 5196 | 1 | 3955 | 1 | ||
| >40 | 2366 | 0.89 (0.81 to 0.99) | 1815 | 1.13 (0.98 to 1.29) | ||
| Parity | 7270 | <0.0001 | <0.0001 | |||
| Primiparous | 3452 | 0.11 (0.10 to 0.12) | 2759 | 0.09 (0.08 to 0.10) | ||
| Multiparous | 3818 | 1 | 3359 | 1 | ||
| Maternal age (years) | 11338 | <0.0001 | 0.04 | |||
| <20 | 1434 | 0.46 (0.40 to 0.52) | 788 | 1.11 (0.89 to 1.38) | ||
| 20–24 | 2554 | 0.91 (0.82 to 1.01) | 1380 | 1.01 (0.85 to 1.21) | ||
| 25–29 | 3477 | 1 | 1849 | 1 | ||
| 30–34 | 2652 | 1.02 (0.92 to 1.12) | 1475 | 0.84 (0.71 to 1.00) | ||
| >35 | 1221 | 1.06 (0.93 to 1.21) | 626 | 0.77 (0.62 to 0.96) | ||
| Birth weight | 8284 | <0.0001 | <0.0001 | |||
| <2500 g | 294 | 0.40 (0.31 to 0.53) | 161 | 0.44 (0.29 to 0.66) | ||
| 2500–4499 g | 7854 | 1 | 5864 | 1 | ||
| >4499 g | 136 | 0.82 (0.58 to 1.16) | 93 | 0.50 (0.32 to 0.79) | ||
| Feeding at hospital discharge | 8137 | <0.0001 | 0.003 | |||
| Formula | 4674 | 1 | 3508 | 1 | ||
| Breast | 3368 | 0.73 (0.67 to 0.80) | 2555 | 0.87 (0.76 to 1.00) | ||
| Mixed | 95 | 0.57 (0.37 to 0.88) | 55 | 0.39 (0.21 to 0.74) | ||
| Deprivation quintile | 11203 | <0.0001 | 0.008 | |||
| 1 | 2251 | 1 | 1321 | 1 | ||
| 2 | 2239 | 1.03 (0.91 to 1.16) | 1206 | 1.07 (0.89 to 1.30) | ||
| 3 | 2239 | 1.26 (1.12 to 1.42) | 1178 | 1.27 (1.04 to 1.55) | ||
| 4 | 2223 | 1.52 (1.35 to 1.71) | 1170 | 1.35 (1.10 to 1.65) | ||
| 5 | 2251 | 1.73 (1.54 to 1.95) | 1243 | 1.37 (1.12 to 1.67) | ||