Table 4. Results of Monte Carlo Simulations (pre_matching ratios of subjects: 1∶2∶3).
caliper | Standardized difference for covariates | Matching ratio | RB13 | RB23 | MSE13 | MSE23 | |||||||
C1 | C2 | C3 | C4 | D1 | D2 | D3 | D4 | ||||||
10% | 0.092 | 0.092 | 0.090 | 0.085 | 0.096 | 0.089 | 0.086 | 0.082 | 81.5% | 4.3% | 3.4% | 0.179 | 0.201 |
20% | 0.084 | 0.082 | 0.081 | 0.078 | 0.087 | 0.081 | 0.078 | 0.073 | 90.3% | 9.2% | 5.0% | 0.164 | 0.175 |
30% | 0.083 | 0.082 | 0.079 | 0.077 | 0.086 | 0.081 | 0.077 | 0.072 | 92.9% | 16.9% | 8.1% | 0.183 | 0.176 |
40% | 0.082 | 0.082 | 0.080 | 0.078 | 0.086 | 0.082 | 0.078 | 0.072 | 94.7% | 26.2% | 12.5% | 0.225 | 0.182 |
50% | 0.082 | 0.083 | 0.081 | 0.080 | 0.088 | 0.085 | 0.079 | 0.073 | 96.2% | 35.6% | 16.3% | 0.288 | 0.193 |
60% | 0.081 | 0.083 | 0.082 | 0.083 | 0.089 | 0.085 | 0.080 | 0.074 | 97.4% | 43.8% | 19.9% | 0.365 | 0.206 |
70% | 0.081 | 0.083 | 0.083 | 0.085 | 0.089 | 0.088 | 0.082 | 0.075 | 98.3% | 50.9% | 22.7% | 0.444 | 0.220 |
80% | 0.082 | 0.084 | 0.085 | 0.087 | 0.089 | 0.089 | 0.085 | 0.076 | 98.9% | 56.7% | 24.9% | 0.516 | 0.230 |