From: Sample size re-estimation in paired comparative diagnostic accuracy studies with a binary response
Diseased patients | Non-diseased patients | ||||||
---|---|---|---|---|---|---|---|
 |  | Pre-PET |  |  | Pre-PET | ||
 |  | +ive | -ive |  |  | +ive | -ive |
Post-PET | +ive | 66 | 3 | Post-PET | +ive | 21 | 4 |
-ive | 3 | 10 | -ive | 11 | 69 |