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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