Characteristics of true-positive versus false-negative CAP cases
| Variable | True positives (n = 179) | False negatives (n = 19) | p Value* |
|---|---|---|---|
| RR, respiration rate. | |||
| Data are n (%) unless otherwise stated. | |||
| *χ2 test, two tailed t-test, Fishers exact test. | |||
| Age (years), mean (SD) | 48 (16) | 52 (19) | 0.3 |
| Gender | 0.4 | ||
| Female | 94 (53) | 8 (42) | |
| Male | 85 (47) | 11 (58) | |
| Race | 0.3 | ||
| African American | 143 (80) | 15 (79) | |
| Caucasian | 34 (19) | 4 (21) | |
| Other | 2 (1) | 0 | |
| Respiratory symptoms | |||
| Cough | 133 (74) | 13 (68) | 0.2 |
| Shortness of breath | 124 (69) | 13 (68) | 0.5 |
| Chest pain | 57 (32) | 8 (42) | 0.2 |
| Abnormal vital signs | |||
| HR >100 beats/min | 123 (69) | 0 | |
| Feve r >38 °C | 90 (50) | 0 | |
| Pulse oximetry <95% | 87 (49) | 0 | |
| RR >20 breaths/min | 83 (46) | 0 | |
| Description of infiltrate | 0.6 | ||
| Unilobar | 130 (73) | 15 (79) | |
| Multilobar | 34 (19) | 2 (10.5) | |
| Interstitial | 15 (8) | 2 (10.5) | |
| Outcome | <0.01 | ||
| Discharged | 43 (24) | 13 (68) | |
| Admitted | 136 (76) | 6 (32) | |
| Triage level | 0.06 | ||
| I | 33 (18) | 0 | |
| II | 117 (65) | 13 (68) | |
| III | 24 (13) | 5 (26) | |
| Unknown | 5 (3) | 1 (6) | |