Table 2 Description of the 12 clinical vignettes and their associated pretest and post-test probabilities, as well as the initial physician decisions
Initial Physician Decision | |||||||
|---|---|---|---|---|---|---|---|
Patient symptoms in vignette | Pretest probability of influenza | Community prevalence of influenza | Rapid flu test result | Post-test probability | Rule-out | Test | Treat |
Cough but no fever, chills/sweats or myalgias | 3% | 30% | Negative | 1.0% | 22 | 14 | 1 |
Cough but no fever, chills/sweats or myalgias | 3% | 10% | Positive | 30% | 22 | 1 | 0 |
Cough and chills/sweats, but no fever or myalgias | 5% | 10% | Negative | 1.7% | 22 | 6 | 0 |
Cough and chills/sweats, but no fever or myalgias | 5% | 10% | Positive | 42% | 29 | 8 | 0 |
Cough and chills/sweats, but no fever or myalgias | 15% | 30% | Negative | 5.3% | 21 | 16 | 0 |
Cough and chills/sweats, but no fever or myalgias | 15% | 30% | Positive | 71% | 12 | 11 | 0 |
Cough and myalgias, but no fever or chills/sweats | 30% | 10% | Negative | 12% | 15 | 20 | 2 |
Cough and myalgias, but no fever or chills/sweats | 30% | 30% | Positive | 86% | 17 | 7 | 4 |
Cough, fever, and chills/sweats but no myalgias | 45% | 30% | Negative | 21% | 1 | 21 | 6 |
Cough, fever, and chills/sweats but no myalgias | 45% | 30% | Positive | 92% | 1 | 25 | 11 |
Cough, fever, and myalgias but no chills/sweats | 63% | 30% | Negative | 35% | 1 | 11 | 11 |
Cough, fever, and myalgias but no chills/sweats | 63% | 30% | Positive | 96% | 1 | 18 | 18 |