Health service use recorded in primary care records in the 20 weeks following the date of consent for participants who reported at least one episode of respiratory tract infection (RTI)
| Control (%) | Intervention (%) | Univariate risk ratio (95% CI; p=value) | Multivariate risk ratio* (95% CI; p=value) | |
|---|---|---|---|---|
| Any consultations | 98/912 (10.8) | 88/851 (10.3) | 0.96 (0.73 to 1.26; p=0.782) | 0.89 (0.65 to 1.23; p=0.514) |
| Any antibiotic prescriptions | 66/880 (7.5) | 64/827 (7.7) | 1.03 (0.74 to 1.43; p=0.853) | 0.94 (0.64 to 1.38; p=0.759) |
| Any hospitalisations | 7/823 (0.9) | 1/765 (0.1) | 0.15 (0.02 to 1.24; p=0.079) | 0.13 (0.02 to 1.11; p=0.062) |
| Any referrals | 10/824 (1.2) | 8/771 (1.0) | 0.86 (0.34 to 2.14; p=0.740) | 0.77 (0.26 to 2.24; p=0.625) |
*Multivariate model controls for gender, age, highest educational qualification, smoking status, whether there are children aged under 16 years living in the household, any comorbid condition, index of multiple deprivation score, and the number of times the patient reported consulting a doctor about an RTI in the 12 months prior to the study.