Number and proportion of household members reporting primary outcomes, by randomisation arm and intention-to-treat analysis (n=597)*
| CRI No (rate person-days) | RR (95% CI) | ILI No (rate person-days) | Laboratory-confirmed viral respiratory infections No (rate person-days) | RR (95% CI) | ||
|---|---|---|---|---|---|---|
| Mask arm† | 4/2098 (1.91/1000) | 0.65 (0.18 to 2.29) | 1/2098 (0.48/1000) | 0.32 (0.03 to 3.11) | 1/2098 (0.48/1000) | 0.97 (0.06 to 15.5) |
| Control arm‡ | 6/2036 (2.95/1000) | Ref | 3/2036 (1.47/1000) | Ref | 1/2036 (0.49/1000) | Ref |
*Household members (mask arm 302 and control arm 295).
†Intracluster correlation coefficient is <0.001.
‡Intracluster correlation coefficient is <0.001.
CRI, clinical respiratory illness; ILI, influenza-like illness; RR, relative risk.