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Table 3 Determinants of GPs’ earning (income and wage) in Iran

From: Income inequality among general practitioners in Iran: a decomposition approach

Variables L Gross Monthly Income L Wage
β* P-value β P-value
Constant 15.438 0.000 10.279 0.000
Gender
 (1 female, 0 male) −.532 0.000 −.159 0.041
Age
 26–35 years Ref
 36–45 years −.018 0.892 .062 0.682
 46–55 years −.204 0.188 −.090 0.592
  ≥ 56 years −.626 0.001 −.627 0.002
Marital status
 (1 married, 0 single) .047 0.583 .152 0.171
Practice setting
 (1 self-employed, 0 other) .357 0.000 .457 0.000
Family Physician
 (1 yes, 0 no) .377 0.000 .120 0.366
Practice location
 Other cities, Villages Ref
 Province centers −.108 0.146 .042 0.651
 Capital of the country −.186 0.010 −.033 0.712
Practice experience
 0–5 years Ref
 6–10 years .123 0.388 .281 0.059
 11–15 years .177 0.202 −.042 0.791
 16–20 years .357 0.017 .157 0.346
  ≥ 21 years .274 0.104 .063 0.729
Goodness of fit F = 14.51 (0.000), R2 = 0.25 F = 6.1 (0.000), R2 = 0.17
  1. β*: Regression coefficients