Table 2 OLS results (overall); outcome variable = % inappropriate laboratory tests

% OLIS Penetration

−0.0913^a

0.0049

−0.0148^a

 Average patient age

−0.0039^a

0.0003^a

−0.0003^a

 Average percentage of male patients

−0.0297^a

−0.0331^a

−0.0043

 Average patient complexity

0.0036^a

0.0089^a

0.0048^a

 Sex of physician (=1 if male; =0 if female)

0.0050^a

−0.0015

0.0004

 Physician age

−0.0002^a

−0.0004^a

0.0000^a

 Constant

−0.0039^a

0.0229^a

0.0242^a

 Number of physicians

8291

8379

8013

 R²

0.492

0.285

0.099