2 × 2 table for analysis of a pilot patient follow up study for the evaluation of child health care screening for congenital hip dislocation
|
Necessity for surgery |
Conservative intervention possible | Total | |
| Adequately screened | 6 | 13 | 19 |
| Inadequately screened | 26 | 15 | 41 |
| Total | 32 | 28 | 60 |
Odds ratio for necessity for surgery depending on whether or not adequately screened.
6:13/26:15 = 0.27 (CI: 0.08, 0.85)