Table 6 Cumulative risk (CR), probabilities of cytological and histological false-positive diagnosis and of true positive per 10 000, ratio between true-positive and false-positive, ratio between CR and false-positive, by screening episodes, for different combination of cytological and histological specificities
CR (per 10 000) | True positive (per 10 000) | True positive/false positive | Positive/false positive | ||||||
|---|---|---|---|---|---|---|---|---|---|
No. of screening episodes | 25–49 (years) | 50–64 (years) | False positive (per 10 000) | 25–49 (years) | 50–64 (years) | 25–49 (years) | 50–64 (years) | 25–49 (years) | 50–64 (years) |
Cytological specificity: 0.97, histological specificity: 0.94 or cytological specificity: 0.94, histological specificity: 0.97 | |||||||||
1 | 206 | 36 | 18.00 | 188.00 | 18.00 | 10.44 | 1 | 11.44 | 2 |
2 | 246 | 38 | 17.97 | 228.03 | 20.03 | 12.69 | 1.11 | 13.69 | 2.11 |
3 | 274 | 36 | 17.94 | 256.06 | 18.06 | 14.28 | 1.01 | 15.28 | 2.01 |
4 | 305 | 23 | 17.90 | 287.10 | 5.10 | 16.04 | 0.28 | 17.04 | 1.28 |
5 | 206 | 23 | 17.87 | 188.13 | 5.13 | 10.53 | 0.29 | 11.53 | 1.29 |
Cytological specificity: 0.96, histological specificity: 0.95 or cytological specificity: 0.95, histological specificity: 0.96 | |||||||||
1 | 206 | 36 | 20.00 | 186.00 | 16.00 | 9.30 | 0.80 | 10.30 | 1.80 |
2 | 246 | 38 | 19.96 | 226.04 | 18.04 | 11.32 | 0.90 | 12.32 | 1.90 |
3 | 274 | 36 | 19.92 | 254.08 | 16.08 | 12.75 | 0.81 | 13.75 | 1.81 |
4 | 305 | 23 | 19.88 | 285.12 | 3.12 | 14.34 | 0.16 | 15.34 | 1.16 |
5 | 206 | 23 | 19.84 | 186.16 | 3.16 | 9.38 | 0.16 | 10.38 | 1.16 |
