Curtis 1997.

Methods	Retrospective cohort
Participants	345 subjects (Hospital A = 209, Hospital B = 136). Hospital A = 96.7% Male 2.9% Female 83.3% White 4.8% Black 6.2% Hispanic Mean age = 36 years Hospital B = 75.7% Male 24.3% Female 28.7% White 39.7% Black 23.5% Hispanic Mean age = 37 years.
Interventions	CLINIC, HOSPITAL, OR WARD VOLUME OF HIV/AIDS PATIENTS: Hospital B cared for five times more patients with PCP than Hospital A.
Outcomes	MORTALITY: Survival to hospital discharge OR = 1.2 (CI: .7‐2.0). HEALTHCARE UTILIZATION: # of days in hospital: Hospital A ‐ 14.8 days Hospital B ‐ 13.9 days p value = 0.5
Notes	No significant difference in hospital survival btw the two institutions.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	D ‐ Not used