Table 2 Incidence density rate of adverse events (AEs) per stratum*
AEsIncidence density95% CI
Large hospital2561.33/100 days1.17 to 1.50/100 days
Medium-sized hospital2070.99/100 days0.85 to 1.12/100 days
Small hospital572.26/100 days1.68 to 2.85/100 days
Medical services2351.04/100 days0.90 to 1.17/100 days
Surgical services2851.42/100 days1.26 to 1.59/100 days
Total5201.22/100 days1.11 to 1.32/100 days
  • *520 AEs occurred and were discovered during the index admission.