Table 2. Patients treated, 2002 Winter Olympic and Paralympic Games.
| Characteristic | Influenza A or B | Noninfluenza | Odds ratio (95% CI*), p adjusted |
|---|---|---|---|
| No. patients treated | 36 | 152 | |
| Accreditation (%) | |||
| Organizing committee volunteers and staff | 14 (39) | 69 (45) | Reference |
| Athletes | 13 (36) | 33 (22) | 2 (0.8–4.6), p = 0.1† |
| Law enforcement personnel | 4 (11) | 26 (17) | 1.3 (0.2–2.5), p = 0.7 |
| Olympic family | 5 (14) | 24 (16) | 1 (0.3–3.2), p = 0.9 |
| Age, y, mean (standard deviation [SD]) | 32 (10) | 35 (13) | 0.7 (0.4–1.0), p = 0.08‡ |
| Sex, male % | 78 | 56 | 5.5 (1.6–18.3), p = 0.006 |
| Symptom duration, mean/median days (SD) | 2.9/2 (3.5) | 3.7/2 (5) | 2.0 (0.7–5.8), p = 0.2§ |
| History of influenza vaccination (%) | 7 (19) | 37 (24) | 1.7 (0.5–1.6), p = 0.4 |
| Temperature >37.8ºC (%) | 14 (39) | 7 (5) | 13 (4.7–36), p<0.001 |
| Symptoms (%) | |||
| History of fever | 22 (61) | 40 (26) | 1.2 (0.4–3.7), p = 0.8 |
| Cough | 33 (92) | 90 (59) | 25.7 (2.2–155), p<0.001 |
| Chills | 20 (56) | 33 (22) | 3.9 (1.2–12.8), p = 0.02 |
| Myalgia | 23 (64) | 57 (38) | 2.1 (0.7–6.4), p = 0.2 |
| Sore throat | 22 (61) | 110 (72) | 0.4 (0.1–1.4), p = 0.2 |
*CI, confidence interval. †Athletes are a significant group when influenza A cases alone are considered, odds ratio 3, 95% CI (1.1–7.5) p = 0.03. ‡Age as grouped by decade. §Symptom duration was grouped as <48 h or >48 h.