Table 2 Analysis of prescription.

From: A letter intervention to GP practices to promote prescription uptake in school-age children with asthma during summer holidays (TRAINS study): a pragmatic cluster randomised controlled trial

  

Treatment arm (Logistic regression model)

Treatment arm (Negative binomial model)

 

Time period

Intervention Freq (%)

Control Freq (%)

Adjusted Odds ratio

95% CI

Intervention Mean (SD)

Control Mean (SD)

Adjusted Incidence ratio

95% CI

(A) For all children in the intention-to-treat population

Prescription uptake

Aug -Sep

15,716 (35.3)

16,001 (35.1)

1.01

0.97–1.05

0.55 (0.95)

0.55 (0.95)

1.01

0.98–1.03

Aug

8330 (18.6)

8475 (18.5)

1.01

0.96–1.05

0.24 (0.56)

0.24 (0.56)

1.02

0.98–1.05

Sep

10,972 (24.7)

11,139 (24.5)

1.01

0.97–1.05

0.31 (0.62)

0.31 (0.62)

1.01

0.98–1.04

Jul –Dec

    

1.69 (2.45)

1.68 (2.45)

1.00

0.98–1.02

(B) For children in the read receipt (RR) population

Prescription uptake

Aug -Sep

7423 (35.9)

16,001 (35.1)

1.02

0.98–1.07

0.56 (0.95)

0.55 (0.93)

1.02

0.98–1.05

Aug

3924 (18.9)

8475 (18.5)

1.02

0.96–1.08

0.25 (0.57)

0.24 (0.55)

1.03

0.98–1.08

Sep

5209 (25.2)

11,139 (24.5)

1.02

0.97–1.08

0.32 (0.61)

0.31 (0.61)

1.01

0.97–1.05

Jul –Dec

    

1.72 (2.49)

1.68 (2.43)

1.01

0.99–1.04

  1. The proportions and means are descriptive summary statistics. The adjusted Odds ratios and Incidence ratios with the corresponding CIs are from a formal statistical analysis allowing for covariates and the effect of clustering. Analysis of read receipt (RR) confirmations was conducted for the intervention practice only.