Table 6. Results of Empirical Study.
caliper | Standardized difference for covariates | Matching ratio | ||||||||
sex | rhythm | LVEDD | age | NYHA | QRS | LVEF | Heart rate | Medicine therapy | ||
unmatched | 0.214 | 0.387 | 4.288 | 0.276 | 0.317 | 0.407 | 0.203 | 0.156 | 0.292 | — |
20% | 0.100 | 0.053 | 0.027 | 0.088 | 0.050 | 0.098 | 0.043 | 0.094 | 0.142 | 73.6% |