Table 1.
Documented signs and symptoms at the time of presentation of patients with A(HIN1)pdm influenza by hospitalized status, multivariate and adjusted multivariate analysis
| Non-hospitalized (N = 316) n (%) | Hospitalized, non-ICU (N = 263) n (%) | Hospitalized, ICU (N = 116) n (%) | Multivariate | Adjusted multivariate* | |||||
|---|---|---|---|---|---|---|---|---|---|
| P | (OR) | 95% CI | P | (OR) | 95% CI | ||||
| Chills | 26 (8) | 12 (5) | 1 (1) | 0·053 | (0·49) | 0·24–1·01 | 0·030 | (0·44) | 0·21–0·93 |
| Congestion | 129 (41) | 86 (33) | 29 (25) | 0·009 | (0·66) | 0·48–0·90 | 0·018 | (0·68) | 0·49–0·93 |
| Cough | 249 (79) | 210 (80) | 79 (68) | n.s.† | n.s.† | ||||
| Diarrhoea | 25 (8) | 29 (11) | 9 (8) | n.s.‡ | n.s.‡ | ||||
| Dizziness | 7 (2) | 3 (1) | 0 (0) | n.s.† | n.s.† | ||||
| Dyspnoea | 21 (7) | 62 (24) | 64 (55) | 0·006 | (6·07) | 4·14–8·91 | <0·001 | (5·82) | 3·94–8·59 |
| Fatigue | 26 (8) | 27 (10) | 28 (16) | 0·004 | (2·11) | 1·29–3·45 | 0·008 | (1·96) | 1·19–3·24 |
| Fever | 302 (96) | 246 (94) | 98 (84) | 0·001 | (0·38) | 0·21–0·69 | 0·004 | (0·41) | 0·22–0·76 |
| Headache | 83 (26) | 26 (10) | 10 (9) | 0·003 | (0·50) | 0·31–0·79 | 0·006 | (0·51) | 0·32–0·83 |
| Myalgia | 71 (22) | 22 (8) | 6 (5) | 0·001 | (0·41) | 0·25–0·69 | 0·002 | (0·44) | 0·26–0·75 |
| Rhinorrhoea | 112 (35) | 79 (30) | 18 (16) | n.s.† | n.s.† | ||||
| Sore throat | 66 (21) | 35 (13) | 9 (8) | 0·089 | (0·68) | 0·43–1·06 | 0·154 | (0·72) | 0·45–1·13 |
| Tachycardia | 16 (5) | 14 (5) | 15 (13) | 0·006 | (2·42) | 1·29–4·52 | 0·003 | (2·61) | 1·38–4·92 |
| Vomiting | 75 (23) | 73 (28) | 28 (24) | n.s.‡ | n.s.‡ | ||||
| Wheezing | 25 (8) | 25 (10) | 19 (16) | n.s.† | n.s.† | ||||
OR, Odds ratio; CI, confidence interval.
*
Adjusted for insurance status and race.
†
n.s., Not significant in multivariate analysis (P > 0·1).
‡
n.s., Not significant in univariate analysis (P > 0·25).