Dodek et al., Patients No specific ratio Hospital mortality, Cross-sectional OR 2.08 (1.45-2.97) nurse In-hospital mortality, 3e 2014 (n=42,381) in 37 intervention. 1:1 vs 1:2 ICU length of stay patient ratio 1:1 vs 1:2 in ICU LOS, Hospital LOS ICUs in British Compared (ICU LOS), BC and 1.37 (0.81-2.33) in Columbia and 20 ratio length of stay (LOS) Ontario for mortality; RR ICUs in Ontario 1.4 (1.09-1.79) in BC and (n=14,165). 0.99 (0.80-1.23) in Ontario (Sample may for ICU LOS; RR 1.38 include paediatric in BC and 1.27 patients) in Ontario for Hospital LOS Dorsey et al., Adult patients No intervention - No specific Presence of Retrospective Temporal relationship Enterobacter and 3e 2000 (n=52) in a used the mean comparator Enterobacter cloacae cohort study between infection Serratia presence surgical ICU in a staffing quotient or Serratia outbreaks and lower general hospital for each of marcescens in the staffing. During outbreak in San Francisco the study blood or CSF months, on average one less staffed empty bed each shift compared to non-outbreak months
Dodek et al., 2014 Patients (n=42,381) in 37 ICUs in British Columbia and 20 ICUs in Ontario (n=14,165). (Sample may include paediatric patients) No specific intervention. Compared ratio ratio 1:1 vs 1:2 Hospital mortality, ICU length of stay (ICU LOS), length of stay (LOS) Cross-sectional OR 2.08 (1.45-2.97) nurse patient ratio 1:1 vs 1:2 in BC and 1.37 (0.81-2.33) in Ontario for mortality; RR 1.4 (1.09-1.79) in BC and 0.99 (0.80-1.23) in Ontario for ICU LOS; RR 1.38 in BC and 1.27 in Ontario for Hospital LOS In-hospital mortality, ICU LOS, Hospital LOS 3e Dorsey et al., 2000 Adult patients (n=52) in a surgical ICU in a general hospital in San Francisco No intervention - used the mean staffing quotient for each of the study No specific comparator Presence of Enterobacter cloacae or Serratia marcescens in the blood or CSF Retrospective cohort study Temporal relationship between infection outbreaks and lower staffing. During outbreak months, on average one less staffed empty bed each shift compared to non-outbreak months Enterobacter and Serratia presence 3e
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