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Cross Tabulation of Test Results
| A. True Disease | Test B | total | ||
|---|---|---|---|---|
| + | − | |||
| Test A | + | Np(SeA − θ+) | Npθ+ | NpSeA |
| − | Np(SeB − SeA + θ+) | Np(1 − SeB − θ+) | Np(1 − SeA) | |
| NpSeB | Np(1 − SeB) | Np | ||
| B. Disease Free | Test B | total | ||
|---|---|---|---|---|
| + | − | |||
| Test A | + | N(1 − p)(1 − SpA − θ−) | N(1 − p)θ− | N(1 − p)(1 − SpA) |
| − | N(1 − p)(SpA − SpB + θ−) | N(1 − p)(SpB − θ−) | N(1 − p)SpA | |
| N(1 − p)(1 − SpB) | N(1 − p)SpB | N(1 − p) | ||
