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Multiple Regression Tables for Difficult Laparoscopic Cholecystectomy.
| Variable | Correlation ( r ) | ( r2 ) | Significance ( t ) | P Value | Positive Predictive Value (%) | Sensitivity |
|---|---|---|---|---|---|---|
| Gallbladder wall thickness | .484465 | .234706 | 4.666348 | .000014 | 90 | 37.5 |
| Contracted gallbladder | .357317 | .127676 | 3.223624 | .001913 | 72.73 | 33.3 |
| Stone impacted at the neck of gallbladder | .520343 | .270757 | 5.134323 | .000002 | 90.91 | 41.67 |
| Combined ultrasono-graphic prediction | .650358 | .422966 | 7.214078 | .000000 | 80.95 | 70.83 |
