TABLE 3.
Association between symptoms for which subjects were referred and those that were experienced during methacholine testing
| Symptom |
Predictive value, % (95% CI) |
P | |
|---|---|---|---|
| Positive | Negative | ||
| Dyspnea (n=191) | 84.1 (78.8–88.3) | 56.1 (48.6–63.3) | <0.001 |
| Cough (n=201) | 86.6 (81.7–90.4) | 36.9 (30.3–44.4) | <0.001 |
| Wheezing (n=98) | 81.0 (73.1–87.0) | 63.8 (58.0–69.2) | <0.001 |
| Chest tightness (n=133) | 71.9 (65.0–77.9) | 75.8 (69.7–81.1) | <0.001 |
The number of subjects for each symptom represents those subjects who reported the specific symptom both before being referred and at the time of methacholine testing