Hypothetical data. Coefficients of bias* for analyses of the relative risk of mortality due to essential hypertension under varying assumptions about the proportion of exposed decedents (P1) coded to ICD-9 rather than ICD-10 and the proportion of unexposed decedents (P0) coded to ICD-9 rather than ICD-10
| P1 | P0 | |||||
|---|---|---|---|---|---|---|
| 0.0 | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 | |
| *The ratio of the relative risk estimate obtained when death certificates are coded to the ICD revision in effect at time of death to the relative risk estimate that would be obtained if all death certificates were coded to ICD-10. | ||||||
| 0.0 | 1.00 | 0.96 | 0.93 | 0.89 | 0.86 | 0.82 |
| 0.2 | 1.04 | 1.00 | 0.96 | 0.93 | 0.89 | 0.85 |
| 0.4 | 1.08 | 1.04 | 1.00 | 0.96 | 0.92 | 0.89 |
| 0.6 | 1.12 | 1.08 | 1.04 | 1.00 | 0.96 | 0.92 |
| 0.8 | 1.17 | 1.12 | 1.08 | 1.04 | 1.00 | 0.96 |
| 1.0 | 1.22 | 1.17 | 1.13 | 1.09 | 1.04 | 1.00 |