Table 4.
Univariate analyses of factors affecting household transmission of influenza infection
| Variables | With household transmission (n = 51) | Without household transmission (n = 367) | Odds ratio (95% CI) | P value |
|---|---|---|---|---|
| Age of household patients (years), n (%) | ||||
| 0–6 | 12 (23.5) | 35 (9.5) | 2.92 (1.40–6.09) | < 0.01 |
| 7–19 | 7 (13.7) | 62 (16.9) | 0.93 (0.42–2.08) | 0.87 |
| 20–64 | 27 (52.9) | 216 (58.8) | 0.77 (0.42–1.38) | 0.38 |
| ≥ 65 | 5 (9.8) | 54 (14.7) | 0.63 (0.24–1.66) | 0.34 |
| Age of index patients (years), n (%) | ||||
| 0–6 | 7 (13.7) | 60 (16.3) | 0.81 (0.35–1.89) | 0.63 |
| 7–19 | 14 (27.4) | 114 (31.1) | 0.84 (0.44–1.61) | 0.60 |
| 20–64 | 23 (45.1) | 144 (39.2) | 1.29 (0.71–2.32) | 0.40 |
| ≥ 65 | 7 (13.7) | 49 (13.4) | 1.03 (0.44–2.42) | 0.94 |
| Household size, n (%) | ||||
| ≤ 3 | 15 (29.4) | 101 (27.5) | 1.10 (0.58–2.09) | 0.78 |
| 4 | 22 (43.1) | 141 (38.4) | 1.22 (0.67–2.20) | 0.52 |
| ≥ 5 | 14 (27.4) | 125 (34.1) | 0.73 (0.38–1.41) | 0.35 |
| Influenza vaccination in the same eason in household patients, n (%) | 18 (35.3) | 117 (31.9) | 1.17 (0.63–2.16) | 0.63 |
| Index patients with baloxavir treatment, n (%) | 10 (19.6) | 108 (29.4) | 0.59 (0.28–1.21) | 0.14 |
| Respiratory tract symptoms in index patients, n (%) | 23 (45.1) | 132 (36.0) | 1.46 (0.81–2.64) | 0.31 |
CI Confidence interval