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Table 5 Effects on length of stay; relevant regression coefficients (RC) and covariance with the managed care group (COV, whether this coefficient is positive or negative) for each variable per DRG.

From: Does managed care make a difference? Physicians' length of stay decisions under managed and non-managed care

DRG Diagnosis/ Procedure HMO patients per physician HMO patients per hospital number of insurers per physician number of insurers per hospital number of hospitals per physician
   RC COV RC COV COV COV COV
88 Chronic Obstructive Pulmonary Disease -0.22 pos 0.48 neg** pos neg pos*
127 Congestive Heart Failure 0.03 pos** 0.46 neg pos pos pos
209 Hip replacement -0.97** neg** -1.60** neg** pos** neg pos**
358 Hysterectomy with complications -0.25** neg -0.25 pos pos* pos pos*
359 Hysterectomy without complications -0.08 neg** 0.49* neg pos** pos pos
370 Cesarean section with complications -0.29* pos* 0.78 pos* pos pos** neg**
371 Cesarean section without complications -0.08** neg 0.59* pos pos** pos* neg
  1. *p < 0.1 **p < 0.05