Table 3.
Characteristics of patients with PCR positive and negative (November 2008 to September 2009; n = 180)*
| Characteristics | PCR positive (n = 65) | PCR negative (n = 115) | P value |
|---|---|---|---|
| Age, year | 48·3 ± 20·1 | 51·7 ± 18·3 | 0·248 |
| Male sex | 24 (36·9) | 44 (38·3) | 0·986 |
| White race | 48 (73·8) | 87 (75·7) | 0·929 |
| Years of schooling | 8 (5·0–11·0) | 8 (4·5–11·0) | 0·929 |
| Current smokers | 22 (36·7) | 20 (20·2) | 0·036 |
| Presence of smokers at home | 29 (44·6) | 39 (33·9) | 0·207 |
| Air conditioning at home or at work | 17 (26·2) | 15 (13·0) | 0·045 |
| Use of wood stoves | 5 (7·7) | 15 (13·0) | 0·395 |
| Mold in home | 17 (26·2) | 37 (32·2) | 0·498 |
| Cough | 59 (90·8) | 99 (86·1) | 0·494 |
| Fever | 43 (66·2) | 66 (57·4) | 0·319 |
| Dyspnea | 53 (81·5) | 101 (87·8) | 0·351 |
| Chest pain | 43 (66·2) | 71 (61·7) | 0·668 |
| Coryza | 34 (52·3) | 49 (43·0) | 0·295 |
| Sore throat | 12 (18·5) | 25 (21·7) | 0·741 |
| Wheezing | 30 (46·2) | 68 (59·1) | 0·128 |
| Duration of symptoms before admission | 3 (1·25-4·0) | 3 (2·0-4·0) | 0·837 |
| ILI | 17 (26·2) | 16 (13·9) | 0·066 |
| SARI | 32 (49·2) | 52 (45·2) | 0·717 |
| Need for hospitalization | 7 (10·8) | 32 (27·8) | 0·013 |
| Length of hospital stay, days | 0·5 (0·5–2·5) | 2 (0·5–6·0) | 0·008 |
| Mortality rate | 0 (0) | 2 (1·7) | 0·536 |
ILI, influenza-like illness; SARI, severe acute respiratory infection.
*
Data are presented as mean ± SD, n/N (%): number of cases with characteristic/total number of cases (percentage), or median (interquartile range).