Table 4.

 Exploratory analysis of antibiotic prescribing at index consultation by general practitioners; intervention groups: practices allocated to point of care testing for C reactive protein (CRP), training in enhanced communication skills, interventions combined, and usual care

Antibiotic prescribing at index consultation	CRP test (n=110)	Communication skills training (n=84)	CRP test and communication skills training (n=117)	Usual care (n=120)
% (No) of patients	39 (43)	33 (28)	23 (27)	67 (80)
Crude 95% CI*	25.6 to 52.6	19.5 to 47.1	11.6 to 34.6	53.9 to 79.5

Testing for significance was not done as trial was designed as a factorial trial.

*Calculated and inflated for clustering by using standard deviation inflated by variance inflation factor.⁵³