Table 2.

 Two level logistic regression model* of odds of being prescribed antibiotic in each network (3296 patients from 384 clinicians). Figures are odds ratios (95% confidence intervals)

Network	OR (95% CI)	P value
Antwerp	0.22 (0.12 to 0.38)	<0.001
Balatonfured	5.69 (2.88 to 11.26)	<0.001
Barcelona	0.29 (0.16 to 0.51)	<0.001
Bratislava	11.2 (6.20 to 20.27)	<0.001
Cardiff	2.44 (1.42 to 4.19)	<0.01
Helsinki	0.58 (0.31 to 1.09)	0.09
Jonkoping	0.25 (0.16 to 0.38)	<0.001
Lodz	4.14 (2.4 to 7.16)	<0.001
Mataro	0.66 (0.37 to 1.18)	0.16
Milan	6.81 (3.49 to 13.27)	<0.001
Rotenberg	0.5 (0.27 to 0.92)	0.03
Southampton	0.84 (0.47 to 1.5)	0.55
Tromso	0.18 (0.11 to 0.30)	<0.001
Utrecht	0.5 (0.29 to 0.85)	0.01

*Model controls for clinician rated symptom scores and clinical presentation. Clinician level variance component was 23.3%, using π²/3 estimator.