Mortality outcome | Total no. (rate per 1000 live births) n = 1 023 978 | ICU state;* no. (rate per 1000 live births) | p value† | |||
---|---|---|---|---|---|---|
Co-ICU n = 1 216 | Maternal ICU n = 897 | NICU n = 123 236 | No ICU n = 898 629 | |||
Short term | ||||||
Infant, < 28 d after delivery | 1 568 (1.5) | 22 (18.1) | 8 (8.9) | 939 (7.6) | 599 (0.7) | < 0.001 |
Mother, < 42 d after delivery | 95 (0.1) | 19 (15.6) | 6 (6.7) | 27 (0.2) | 43 (0.05) | < 0.001 |
Mother–infant pair | 9 (0.01)‡ | –§ | –§ | –§ | –§ | |
1 year after delivery | ||||||
Infant | 2 614 (2.6) | 28 (23.0) | 9 (10.0) | 1 451 (11.8) | 1 126 (1.3) | < 0.001 |
Mother | 262 (0.3) | 23 (18.9) | 9 (10.0) | 68 (0.6) | 162 (0.2) | < 0.001 |
Mother–infant pair | 15 (0.01)¶ | –§ | –§ | –§ | –§ |
↵* 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.
↵‡ Of these 9 deaths, 8 involved nulliparous women.
↵§ The number and rate are suppressed owing to small sample size.
↵¶ Of these 15 deaths, 11 involved nulliparous women.