Table 2 Differences in standardized average number of RTI-related antibiotic prescriptions (per 1,000 patients per year) between intervention and control PTAM groups for the total number of prescriptions and for prescriptions stratified by age (cut-off: 12 years), assessed with multilevel modelling

From: Reducing antibiotic prescriptions for respiratory tract infections in family practice: results of a cluster randomized controlled trial evaluating a multifaceted peer-group-based intervention

 

Intervention groups n/1,000 patients/year

Control groups n/1,000 patiens/year

Difference

Total number of RTI-related antibiotic prescriptions

 Baseline

207.9

176.7

31.1

 Follow-up

161.2

154.1

7.1

 Change

−46.7***

−22.7*

 
 

Intervention groupsa n/1,000 patients/year

Control groupsb n/1,000 patients/year

Difference

Number of RTI-related antibiotic prescriptions <12 years

 Baseline

30.6

24.2

6.4

 Follow-up

21.6

19.2

2.7

 Change

−8.9***

−5.0**

 

Number of RTI-related antibiotic prescriptions ⩾12 years

 Baseline

156.3

129.7

26.6

 Follow-up

128.4

122.5

6.0

 Change

−27.8***

−7.2

 
  1. Significance levels: *P<0.05; **P<0.01; ***P<0.001.
  2. Abbreviations: PTAM, PharmacoTherapy Audit Meetings; RTI, respiratory tract infections.
  3. aFor 5.3% of patients age was unknown.
  4. bFor 10.6% of patients age was unknown.
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