Table 4

 Observed and risk-adjusted mortality by unit organisational type

Unit typeDied n (%)Crude mortalityRisk-adjusted mortality
p ValueOR (95% CI*)p ValueOR (95% CI*)
*The odds ratios and 95% confidence intervals are derived using logistic regression modelling with an odds ratio <1 indicating a decrease in odds relative to high volume/consultant/nursing units.
Unit volume type
High111 (11.7)Referent categoryReferent category
Medium93 (11.2)0.730.95 (0.71 to 1.27)0.441.18 (0.77, 1.8)
Low65 (8.1)0.010.66 (0.48 to 0.91)0.630.89 (0.56 to 1.41)
Unit consultant availability
High146 (11.1)Referent categoryReferent category
Low123 (9.7)0.220.85 (0.66 to 1.10)0.430.86 (0.6 to 1.24)
Unit nursing establishment
High133 (9.7)Referent categoryReferent category
Low136 (11.3)0.191.18 (0.92 to 1.52)0.161.3 (0.9 to 1.9)