Outcome | Total no. (%) n = 1 023 978 | ICU state;* no. (%) of deliveries | p value† | |||
---|---|---|---|---|---|---|
Co-ICU n = 1 216 | Maternal ICU n = 897 | NICU n = 123 236 | No ICU n = 898 629 | |||
Infant transferred | 12 390 (1.2) | 159 (13.1) | 36 (4.0) | 9 026 (7.3) | 3 169 (0.4) | < 0.001 |
Mother transferred | 1 586 (0.2) | 26 (2.1) | 36 (4.0) | 263 (0.2) | 1 261 (0.1) | < 0.001 |
Mother and infant transferred to same or different facility | 1 461 (0.1)§ | 16 (1.3) | 9 (1.0) | 343 (0.3) | 1 093 (0.1) | < 0.001 |
Mother and infant separated because of interfacility transfer‡ | 14 054 (1.4) | 186 (15.3) | 74 (8.2) | 9 334 (7.6) | 4 460 (0.5) | < 0.001 |
↵* Co-ICU = both mother and newborn admitted to ICUs during index hospital admission; maternal ICU = only mother admitted to ICU; NICU = only newborn admitted to ICU; no ICU = neither mother nor newborn admitted to an ICU.
↵† χ2 test, for comparison between the 4 ICU states.
↵‡ Separation due to transfer of one or the other from the delivery hospital to another facility or transfer of both from the delivery hospital to different facilities.
↵§ Of the transfers of mother–infant pairs, 78 (5.3%) involved transfer of the mother and infant to different facilities.