Skip to main content

Table 1 Healthcare-associated infection incidence per 1000 resident days in nursing homes: intervention versus control arm1

From: The effect of a hand hygiene intervention on infections in residents of nursing homes: a cluster randomized controlled trial

Illness and period1 Intervention arm Control arm Incidence rate ratio2 (95% CI) (Full dataset) Incidence rate ratio (95% CI) Sensitivity analysis2,3
Per 1000 resident days Number of cases Per 1000 resident days Number of cases   p-value   p-value
Gastroenteritis
Baseline 1.16 (75/64617) 1.32 (72/54453)     
Follow-up 1 0.84 (89/106554) 0.51 (57/111048)     
Follow-up 2 0.18 (26/144914) 0.08 (12/158900)     
      2.32 (1.49, 3.61)  < 0.001 1.03 (0.56, 1.90) 0.92
Influenza-like illness
Baseline 1.15 (74/64617) 0.48 (26/54453)     
Follow-up 1 0.89 (95/106554) 0.93 (103/111048)     
Follow-up 2 0.19 (27/144914) 0.14 (22/158900)     
      0.51 (0.31, 0.82)  < 0.01 4
Pneumonia
Baseline 0.76 (49/64617) 0.62 (34/54453)     
Follow-up 1 0.83 (88/106554) 0.76 (84/111048)     
Follow-up 2 0.38 (55/144914) 0.52 (82/158900)     
      0.87 (0.60, 1.26) 0.47 0.79 (0.52, 1.21) 0.28
Urinary tract infection
Baseline 1.72 (111/64617) 1.43 (78/54453)     
Follow-up 1 1.86 (198/106554) 1.02 (113/111048)     
Follow-up 2 1.48 (214/144914) 1.43 (227/158900)     
      1.05 (0.78, 1.42) 0.75 1.15 (0.83, 1.59) 0.39
  1. 1Baseline: October 2016–December 2016, Follow-up 1: January 2017–April 2017, Follow-up 2: May 2017–October 2017. 2The results were corrected for the clustering of infection registrations within nursing homes, baseline differences and period in the study, in a multilevel Poisson regression. 3The sensitivity analysis excluded the highest 1% incident rates per HAI per week. 4Could not fit model due to convergence issues. CI: Confidence Interval