Table 2.
Subject Demographic and Clinical Characteristics
| All N = 94 | Bacterial (Bacterial alone and Mixed Bacterial Viral) N = 41 | Non Bacterial (Viral alone) N = 53 | Fisher’s Exact or t-test P value | |
|---|---|---|---|---|
| Demographics | ||||
| Age, mean ± SD | 61 ± 18 | 67 ± 18 | 57 ± 17 | 0.01 |
| Male Sex, No. (%) | 42 (45) | 21 (51) | 21 (40) | 0.30 |
| White Race | 73 (78) | 35 (85) | 38 (72) | 0.14 |
| Underlying Conditions | ||||
| COPD, No. (%) | 30 (32) | 17 (41) | 13 (25) | 0.12 |
| CHF, No. (%) | 23 (24) | 10 (24) | 13 (25) | 1 |
| Diabetes, No. (%) | 27 (29) | 13 (32) | 14 (26) | 0.65 |
| Symptoms | ||||
| Nasal Congestion, No. (%) | 50 (53) | 14 (34) | 36 (68) | 0.002 |
| Cough, No. (%) | 85 (90) | 34 (83) | 51 (96) | 0.04 |
| Sputum, No. (%) | 66 (70) | 29 (71) | 37 (70) | 1 |
| Dyspnea, No. (%) | 81 (86) | 34 (83) | 47 (89) | 0.55 |
| Rigors, No. (%) | 30 (32) | 12 (29) | 18 (34) | 0.66 |
| Physical Findings | ||||
| Wheezing, No. (%) | 66 (70) | 25 (61) | 41 (77) | 0.11 |
| Rales, No. (%) | 29 (31) | 15 (37) | 14 (26) | 0.37 |
| Temperature (°C) | 37.8 ± 1.0 | 37.8 ± 0.9 | 37.8 ± 1.0 | 0.93 |
| Systolic Blood Pressure, mean ± SD | 112 ± 21 | 111 ± 25 | 113 ± 18 | 0.73 |
| Oxygen Saturation, mean ± SD | 90.0 ± 6.0 | 88.4 ± 7.1 | 91.2 ± 4.7 | 0.03 |
| Laboratory Data | ||||
| Infiltrate on Chest Radiograph | 27 (29) | 21 (52) | 6 (11) | <0.0001 |
| White blood cell count, mean ± SD | 10.7 ± 5.6 | 13.7 ± 6.8 | 8.5 ± 2.9 | <0.0001 |
| % bands in peripheral blood, mean ± SD | 3.1 ± 5.6 | 5.2 ± 6.9 | 0.7 ± 1.9 | 0.002 |
| Blood urea nitrogen, mean ± SD | 19 ± 12 | 23 ± 15 | 16 ± 8 | 0.005 |