Table 3.
Population values of DN, DS, and EV for dichotomous outcome and dichotomous prognostic factor
| Scenario | P(D) | α | OR | a | b | c | d | DN | DS | EV |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.1 | 0.1 | 10 | 84.1 | 5.9 | 5.9 | 4.1 | 0.346 | 0.346 | 0.120 |
| 2 | 0.1 | 0.5 | 10 | 48.9 | 41.1 | 1.1 | 8.9 | 0.787 | 0.087 | 0.069 |
| 3 | 0.1 | 0.9 | 10 | 9.9 | 80.1 | 0.1 | 9.9 | 0.878 | 0.011 | 0.010 |
| 4 | 0.5 | 0.1 | 10 | 48.9 | 1.1 | 41.1 | 8.9 | 0.087 | 0.787 | 0.069 |
| 5 | 0.5 | 0.5 | 10 | 38.0 | 12.0 | 12.0 | 38.0 | 0.519 | 0.519 | 0.270 |
| 6 | 0.5 | 0.9 | 10 | 8.9 | 41.1 | 1.1 | 48.9 | 0.787 | 0.087 | 0.069 |
| 7 | 0.9 | 0.1 | 10 | 9.9 | 0.1 | 80.1 | 9.9 | 0.011 | 0.878 | 0.010 |
| 8 | 0.9 | 0.5 | 10 | 8.9 | 1.1 | 41.1 | 48.9 | 0.087 | 0.787 | 0.069 |
| 9 | 0.9 | 0.9 | 10 | 4.1 | 5.9 | 5.9 | 84.1 | 0.346 | 0.346 | 0.120 |
| 10 | 0.1 | 0.1 | 100 | 87.4 | 2.6 | 2.6 | 7.4 | 0.716 | 0.716 | 0.513 |
| 11 | 0.1 | 0.5 | 100 | 49.9 | 40.1 | 0.1 | 9.9 | 0.975 | 0.108 | 0.106 |
| 12 | 0.1 | 0.9 | 100 | 10.0 | 80.0 | 0.0 | 10.0 | 0.988 | 0.012 | 0.012 |
| 13 | 0.5 | 0.1 | 100 | 49.9 | 0.1 | 40.1 | 9.9 | 0.108 | 0.975 | 0.106 |
| 14 | 0.5 | 0.5 | 100 | 45.5 | 4.5 | 4.5 | 45.5 | 0.818 | 0.818 | 0.669 |
| 15 | 0.5 | 0.9 | 100 | 9.9 | 40.1 | 0.1 | 49.9 | 0.975 | 0.108 | 0.106 |
| 16 | 0.9 | 0.1 | 100 | 10.0 | 0.0 | 80.0 | 10.0 | 0.012 | 0.988 | 0.012 |
| 17 | 0.9 | 0.5 | 100 | 9.9 | 0.1 | 40.1 | 49.9 | 0.108 | 0.975 | 0.106 |
| 18 | 0.9 | 0.9 | 100 | 7.4 | 2.6 | 2.6 | 87.4 | 0.716 | 0.716 | 0.513 |
| 19 | 0.1 | 0.1 | 0.1 | 5.9 | 84.1 | 4.1 | 5.9 | 0.346 | 0.346 | 0.120 |
| 20 | 0.1 | 0.5 | 0.1 | 41.1 | 48.9 | 8.9 | 1.1 | 0.787 | 0.087 | 0.069 |
| 21 | 0.1 | 0.9 | 0.1 | 80.1 | 9.9 | 9.9 | 0.1 | 0.878 | 0.011 | 0.010 |
| 22 | 0.5 | 0.1 | 0.1 | 1.1 | 48.9 | 8.9 | 41.1 | 0.087 | 0.787 | 0.069 |
| 23 | 0.5 | 0.5 | 0.1 | 12.0 | 38.0 | 38.0 | 12.0 | 0.519 | 0.519 | 0.270 |
| 24 | 0.5 | 0.9 | 0.1 | 41.1 | 8.9 | 48.9 | 1.1 | 0.787 | 0.087 | 0.069 |
| 25 | 0.9 | 0.1 | 0.1 | 0.1 | 9.9 | 9.9 | 80.1 | 0.011 | 0.878 | 0.010 |
| 26 | 0.9 | 0.5 | 0.1 | 1.1 | 8.9 | 48.9 | 41.1 | 0.087 | 0.787 | 0.069 |
| 27 | 0.9 | 0.9 | 0.1 | 5.9 | 4.1 | 84.1 | 5.9 | 0.346 | 0.346 | 0.120 |
| 28 | 0.1 | 0.1 | 1 | 81.0 | 9.0 | 9.0 | 1.0 | 0.000 | 0.000 | 0.000 |
| 29 | 0.5 | 0.5 | 1 | 25.0 | 25.0 | 25.0 | 25.0 | 0.000 | 0.000 | 0.000 |
| 30 | 0.5 | 0.5 | 0 | 0.0 | 50.0 | 50.0 | 0.0 | 1.000 | 1.000 | 1.000 |
| 31 | 0.1 | 0.5 | ∞ | 50.0 | 40.0 | 0.0 | 10.0 | 1.000 | 0.111 | 0.111 |
| 32 | 0.5 | 0.5 | ∞ | 50.0 | 0.0 | 0.0 | 50.0 | 1.000 | 1.000 | 1.000 |
| 33 | 0.9 | 0.5 | ∞ | 10.0 | 0.0 | 40.0 | 50.0 | 0.111 | 1.000 | 0.111 |
| 34 | 0.01 | 0.5 | 100 | 50.0 | 49.0 | 0.01 | 1.0 | 0.980 | 0.010 | 0.010 |
| 35 | 0.5 | 0.01 | 100 | 50.0 | 0.01 | 49.0 | 1.0 | 0.010 | 0.980 | 0.010 |
Abbreviations: P(D), unconditional disease probability; OR, odds ratio; α, probability of harmful level of X; a, b, c, d, as by Table 2 but with probabilities (%).