Skip to main content

Advertisement

Table 5 Estimates of Probit model with sample selection

From: Horizontal equity in access to public GP services by socioeconomic group: potential bias due to a compartmentalised approach

Public GP equationProbit equationSelection equation
Coefficient (se)p-valueCoefficient (se)p-value
Female0.1081 (0.0186)0.000−0.0767 (0.0227)0.001
Age 15–34Ref.Ref.Ref.Ref.
Age 35–44−0.0215 (0.0339)0.525−0.023 (0.0409)0.574
Age 45–54−0.0112 (0.0337)0.739−0.0342 (0.0408)0.401
Age 55–640.0488 (0.0337)0.148−0.0073 (0.0413)0.861
Age more than 640.1073 (0.0368)0.0040.0914 (0.0451)0.043
Health very goodRef.Ref.Ref.Ref.
Health good0.2163 (0.0287)0.000−0.2048 (0.0365)0.000
Health fair0.6757 (0.0335)0.000−0.5386 (0.0418)0.000
Health bad1.0275 (0.0441)0.000−0.791 (0.0514)0.000
Health very bad1.0957 (0.0676)0.000−0.8163 (0.0737)0.000
Chronics0.43 (0.0252)0.000−0.2672 (0.0309)0.000
InactiveRef.Ref.Ref.Ref.
Employed−0.135 (0.0286)0.0000.1467 (0.0345)0.000
Unemployed−0.0699 (0.0366)0.0560.0883 (0.045)0.050
Primary studies or lessRef.Ref.Ref.Ref.
Obligatory Secondary studies0.046 (0.0264)0.082−0.1637 (0.0337)0.000
Occupational training or pre-university studies0.0486 (0.0311)0.117−0.2133 (0.0383)0.000
University studies0.1371 (0.0385)0.000−0.3884 (0.0431)0.000
High social class (SC)Ref.Ref.Ref.Ref.
Medium-high SC0.0084 (0.0321)0.7940.115 (0.0344)0.001
Medium-low SC0.0343 (0.0352)0.3290.2036 (0.0379)0.000
Low social class0.05 (0.0406)0.2170.2604 (0.0462)0.000
Double coverage  −0.4081 (0.0302)0.000
Intercept−1.1554 (0.0564)0.0001.7604 (0.0627)0.000
rho−0.8660 (0.0537)0.000 
N19,72722,450