Appendix Table 2:

Association between Primary Care Physician Characteristics and Low Value Care Spending of Attributed Medicare Patients

CharacteristicPanel A: OLS EstimatesPanel B: Logit Odds Ratios
Physician Characteristics
    Non-US Medical Graduate−0.2320.4150.9850.113
        Patient Size
        50 to 149−2.7750.4680.4170.056
        150 to 299−1.8090.4170.5420.070
        Internal MedicineReferenceReference
        Family Medicine−1.0630.3180.7020.067
        Other Specialty−1.0570.6540.8180.193
    Graduation Year
        1980 to 1989−0.1610.3831.0900.124
        1990 to 2000−0.7300.4090.9730.112
    Practice Region
Patient Characteristics
    Age (years)
        65 to 69ReferenceReference
        70 to 74−0.0350.0400.9950.010
        75 to 79−0.0630.0350.9890.010
        80 to 84−0.1290.0340.9830.010
    ElixHauser Comorbidity Index
        1 to 20.050*0.0241.0150.009
        3 to 50.2130.0311.0580.007
Practice Location Characteristics
    <12 years schooling−0.0970.0340.978*0.011
    <200% FPL−0.0770.0150.9790.005
    Number of Observations6,905
  • FPL, federal poverty line; OLS, ordinary least squares. Note: The dependent variable for Panel A was per-patient low value care (LVC) Medicare spending in dollar amounts, while the OR ratios in Panel B were calculated from logit regression results, where the dependent variable was equal to 1 if the primary care physician's (PCP's) per-patient LVC Medicare spending was in the top quintile. Both models were estimated using sample weights that reflect the oversampling of physicians in smaller states. For graphical representations of the estimates of PCP characteristics, see Figure 2 for Panel A and Figure 3 for Panel B.

  • * P < .05.

  • P < .01.

  • P < .001.