Table 4.
Incidence rates of URTI in the total study population.
| Incidence Rate (per 100 person days) | p value | ||
|---|---|---|---|
| Active | Placebo | ||
| URTI Symptoms | 1.30 | 2.16 | |
| IRR (95% CI) | 0.60 (0.52, 0.70) | <0.0001 | |
| Individual URTI symptoms | |||
| Sneezing | 0.71 | 1.31 | |
| IRR (95% CI) | 0.54 (0.44, 0.66) | <0.0001 | |
| Cough | 0.38 | 0.57 | |
| IRR (95% CI) | 0.67 (0.50, 0.90) | 0.0073 | |
| Runny nose | 0.46 | 0.52 | |
| IRR (95% CI) | 0.89 (0.67, 1.18) | 0.4268 | |
| Blocked nose | 0.46 | 0.64 | |
| IRR (95% CI) | 0.72 (0.55, 0.95) | 0.0181 | |
| Sore Throat | 0.25 | 0.31 | |
| IRR (95% CI) | 0.80 (0.55, 1.17) | 0.2512 | |
| Other symptoms | |||
| Headache | 1.08 | 1.58 | |
| IRR (95% CI) | 0.68 (0.58, 0.81) | <0.0001 | |
| Earache | 0.08 | 0.17 | |
| IRR (95% CI) | 0.48 (0.27, 0.88) | 0.0173 | |
| Muscle pain | 0.28 | 0.42 | |
| IRR (95% CI) | 0.67 (0.48, 0.95) | 0.0225 | |
| Chest wheeze | 0.09 | 0.15 | |
| IRR (95% CI) | 0.62 (0.34, 1.12) | 0.1112 | |
| Itchy eyes | 0.19 | 0.23 | |
| IRR (95% CI) | 0.80 (0.52, 1.24) | 0.3218 | |
| Antibiotic usage | 0.08 | 0.08 | |
| IRR (95% CI) | 0.94 (0.46, 1.89) | 0.8552 | |
Data is presented as incidence rate or incidence rate ratios (IRR) of 110 participants per group with 95% CIs and p values were calculated using a GLM with Poisson distribution and log link function. CI, confidence interval.