Risk factors for any readmission to hospital at <29 days of age, with no clear organic diagnosis in 283 readmissions and 11406 controls taken from five maternity units in the Northern Region of the UK
| Variable | Multivariate* | ||
|---|---|---|---|
| n Cases/controls | Odds ratio† (95% CI) | Likelihood ratio test p value | |
| *8217 subjects had full information for all variables in the multivariate model. | |||
| †Odds ratios adjusted for all other variables in multivariate model. | |||
| ‡Maternity unit 5 was removed due to insufficient data. | |||
| Unit of delivery | 0.02 | ||
| Hospital 1 | 73/3188 | 1 | |
| Hospital 2 | 48/1748 | 1.27 (0.87 to 1.84) | |
| Hospital 3 | 31/747 | 2.02 (1.31 to 3.12) | |
| Hospital 4 | 47/2335 | 1.08 (0.73 to 1.58) | |
| Hospital 5 | –‡ | ||
| Gestation (weeks) | 0.03 | ||
| 35–37 | 26/551 | 1.27 (0.79 to 2.06) | |
| 38–40 | 134/5137 | 1 | |
| >40 | 39/2330 | 0.67 (0.46 to 0.96) | |
| Birth weight | 0.001 | ||
| <2500 g | 20/239 | 2.82 (1.65 to 4.83) | |
| 2500–4499 g | 178/7647 | 1 | |
| >4499 g | 1/132 | 0.37 (0.05 to 2.64) | |
| Feeding at hospital discharge | 0.02 | ||
| Formula | 135/4604 | 1 | |
| Breast | 63/3322 | 0.67 (0.50 to 0.92) | |
| Mixed | 1/92 | 0.35 (0.05 to 2.55) | |
| Early discharge | 0.04 | ||
| No | 130/4596 | 1 | |
| Yes | 69/3422 | 0.73 (0.54 to 0.99) | |