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Table 4 Positive blood cultures per 1000 patient-days by study group and by study period

From: A multimodal intervention to improve hand hygiene compliance in peripheral wards of a tertiary care university centre: a cluster randomised controlled trial

Study group Baseline period Intervention period Follow-up period Comparison
  Number of isolates Mean rate/ 1000 patient-days (CI95) Number of isolates Mean rate/ 1000 patient-days (CI95) Number of isolates Mean rate/ 1000 patient-days (CI95) IRR (CI95), p-value
Intervention vs. Baseline
IRR (CI95), p-value
Follow-up vs. Baseline
IRR (CI95), p-value
Follow-up vs. Intervention
Intervention group 161 1.42 (1.21, 1.66) 172 1.46 (1.25, 1.70) 53 1.78 (1.33, 2.32) 1.03 (0.83, 1.27), 0.80 1.25 (0.91, 1.69), 0.17 1.22 (0.88, 1.64), 0.22
Control group 226 1.98 (1.73, 2.26) 297 2.54 (2.26, 2.85) 59 2.08 (1.58, 2.68) 1.28 (1.08, 1.53), < 0.01 1.05 (0.78, 1.39), 0.74 0.82 (0.61, 1.07), 0.15
  1. Abbreviations: IRR incidence rate ratio, CI95 95% confidence interval