Table 4

Outcome by infant:staff ratios, pooled over 9 shifts (divided into terciles) with crude odds ratio (OR) of mortality and adjusted mortality OR (adjusted for CRIB only, CRIB, and dependency)

Infant:staff pooled ratiosCRIB mean (SD)SurvivedDied (% of total)TotalCrude OR (95% CI)Adjusted OR (95% CI) (CRIB)Adjusted OR (95% CI) (CRIB & Dependency)
1.16–1.58 (low)3.79 (4.05)20230 (12.9)232
1.59–1.704.40 (4.27)19337 (16.1)2301.29 (0.77 to 2.17)1.05 (0.55 to 2.00)0.84 (0.42 to 1.66)
1.71–1.973.71 (3.69)21713 (5.7)2300.40 (0.21 to 0.80)0.32 (0.15 to 0.71)0.18 (0.06 to 0.5)