Table 5. Results of Monte Carlo Simulations (pre_matching ratios of subjects: 2∶3∶5).
caliper | Standardized difference for covariates | Matching ratio | RB13 | RB23 | MSE13 | MSE23 | |||||||
C1 | C2 | C3 | C4 | D1 | D2 | D3 | D4 | ||||||
10% | 0.083 | 0.081 | 0.077 | 0.077 | 0.088 | 0.080 | 0.073 | 0.070 | 77.3% | 3.3% | 2.0% | 0.152 | 0.160 |
20% | 0.076 | 0.075 | 0.070 | 0.069 | 0.079 | 0.071 | 0.066 | 0.065 | 87.0% | 8.4% | 3.7% | 0.140 | 0.144 |
30% | 0.076 | 0.075 | 0.070 | 0.069 | 0.079 | 0.072 | 0.068 | 0.065 | 90.0% | 17.4% | 7.4% | 0.161 | 0.139 |
40% | 0.076 | 0.074 | 0.070 | 0.070 | 0.079 | 0.073 | 0.069 | 0.066 | 92.2% | 28.5% | 12.1% | 0.213 | 0.145 |
50% | 0.076 | 0.075 | 0.073 | 0.074 | 0.080 | 0.076 | 0.072 | 0.068 | 94.1% | 40.4% | 17.5% | 0.303 | 0.160 |
60% | 0.076 | 0.076 | 0.075 | 0.079 | 0.080 | 0.079 | 0.076 | 0.069 | 95.6% | 52.1% | 22.7% | 0.424 | 0.183 |
70% | 0.076 | 0.077 | 0.078 | 0.083 | 0.082 | 0.082 | 0.079 | 0.072 | 96.9% | 62.2% | 27.2% | 0.552 | 0.209 |
80% | 0.076 | 0.078 | 0.081 | 0.088 | 0.084 | 0.085 | 0.083 | 0.075 | 97.9% | 71.4% | 31.4% | 0.690 | 0.237 |