Table 3 NPV values in relation to prevalence, SE and SP values SE_SP = value of SE _ values of SP
From: Questioning the “SPIN and SNOUT” rule in clinical testing
| NPV | PREVALENCE | ||||
|---|---|---|---|---|---|
| 0.2 | 0.4 | 0.6 | 0.8 | ||
| SE_SP | 0.8_0.8 | 0.94 | 0.86 | 0.73 | 0.50 |
| 0.4_0.8 | 0.84 | 0.67 | 0.47 | 0.25 | |
| 0.8_0.4 | 0.89 | 0.75 | 0.57 | 0.33 | |
| 0.4_0.4 | 0.73 | 0.50 | 0.31 | 0.14 | |