Table 1 Cross-tabulation for reference standard (RS = target condition) and test result (PSP-test), absolute and relative frequencies
From: Detection of colon polyps by a novel, polymer pattern-based full blood test
PSP-Test | RS | All | ||||
|---|---|---|---|---|---|---|
D- | D+ | |||||
N | % | N | % | N | % | |
T- | 99 | 62.3 | 8 | 27.6 | 107 | 56.9 |
T+ | 60 | 37.7 | 21 | 72.4 | 81 | 43.1 |
All | 159 | 100.0 | 29 | 100.0 | 188 | 100.0 |
Diagnostic accuracy (Sens, spec) | ||||||
Sens: | 72.4% (width of Cl: 52.8%.. 87.3%) | |||||
Spec: | 62.3% (width of Cl: 54.2%.. 69.8%) | |||||
Missings | RS | |||||
D- | D+ | |||||
Total | 159 + 6 = 165 | 29 + 22 = 51 | 188 + 28 = 216 | Total | 159 + 6 = 165 | 29 + 22 = 51 |
Prev: | 23.6% | |||||
Diagnostic accuracy (predictive values acc. Bayes theorem) | ||||||
PPV: | 37.2% (width of Cl: 30.5%.. 44.5%) | |||||
NPV: | 88.0% (width of Cl: 80.0%. 93.0%) | |||||
Unknown RS | 17 | 17 | ||||
Total | 233 | |||||