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Table 3 Adjusted estimates of IRR and their 95% CIs obtained from the negative binomial regression model showing the differences in counts between the groups before and after the intervention

From: Effect of an educational intervention for telephone triage nurses on out-of-hours attendance: a pragmatic randomized controlled study

  

Before

After

Number of RTI consultations in the out-of-hours GP cooperatives

Control

23,589

22,956

 

Intervention

25,321

25,245

 

Difference

1732

2289

 

IRR (95% CI, ref. control)

0.97 (0.82–1.13)

0.95 (0.82–1.11)

Difference in number of RTI consultations between the two groups after the intervention, ref. control

Numbers of consultations (ref. control)

 

557

IRR (95% CI, ref. control)

 

0.99 (0.91–1.07)

  1. CI, confidence interval; IRR, incidence rate ratio; RTI, respiratory tract infection
  2. The model was adjusted for the number of nurses participating in the e-learning course, population size and patients’ age groups, with the out-of-hours GP cooperatives defined as clusters. The model indicates that there is no difference in the number of RTI consultations between the two groups after the intervention