Table 1 Distribution of Instrumental Variable Causal Forest Algorithm Early Surgery Absolute Effects on the Benefit Outcomea for Medicare Patients with Proximal Humerus Fractures in 2011 by Number of Trees in IV-CFA Forest and Minimum Leaf Node Population Size in Each Tree
Trees in IV-CFA Forest | Minimum Leaf Node Population Size | Mean | St Dev | Percent of Patients with Positive Effect | Min | 10th | 25th | 50th Median | 75th | 90th | Max |
|---|---|---|---|---|---|---|---|---|---|---|---|
3000 | 50 | .198 | .327 | 75% | -1.448 | -.193 | .0001 | .203 | .411 | .586 | 1.368 |
100 | .196 | .236 | 81% | -.729 | -.088 | .056 | .204 | .350 | .481 | .908 | |
200 | .197 | .175 | 88% | -.449 | -.033 | .100 | .210 | .311 | .418 | .675 | |
300 | .198 | .147 | 90% | -.284 | -.005 | .110 | .213 | .299 | .373 | .587 | |
400 | .198 | .131 | 91% | -.220 | .013 | .118 | .214 | .290 | .358 | .518 | |
4000 | 50 | .197 | .331 | 75% | -1.457 | -.208 | -.004 | .200 | .413 | .593 | 1.366 |
100 | .197 | .237 | 81% | -.727 | -.094 | .058 | .204 | .353 | .480 | .906 | |
200 | .196 | .177 | 87% | -.434 | -.038 | .096 | .208 | .312 | .421 | .659 | |
300 | .197 | .148 | 90% | -.283 | -.008 | .109 | .213 | .299 | .374 | .565 | |
400 | .198 | .132 | 91% | -.206 | .014 | .116 | .215 | .290 | .362 | .512 | |
5000 | 50 | .198 | .327 | 75% | -1.389 | -.201 | .003 | .202 | .413 | .590 | 1.375 |
100 | .197 | .234 | 81% | -.721 | -.087 | .060 | .201 | .352 | .477 | .882 | |
200 | .197 | .172 | 87% | -.417 | -.032 | .100 | .209 | .308 | .414 | .663 | |
300 | .198 | .145 | 90% | -.278 | -.004 | .112 | .214 | .296 | .369 | .560 | |
400 | .198 | .129 | 91% | -.189 | .018 | .117 | .217 | .286 | .354 | .505 |