Table 3.

Regression coefficients (95% confidence intervals) from the Physician Density Prediction Model of two variables (proportion under age 15 years, life expectancy)

	Training Set (N = 65)	Validation Set (N = 65)	Entire Set (N = 130)
Intercept	4.841 (1.543, 8.139)	5.412 (2.056, 8.777)	5.014* (2.676, 7.351)
Proportion under age 15 years	-0.125 (-0.162, -0.088)	-0.134 (-0.172, -0.096)	-0.128* (-0.154, -0.102)
Life expectancy (years)	0.033 (-0.002, 0.068)	0.033 (-0.003, 0.069)	0.034† (0.009, 0.059)
R-squared	81.6%	80.1%	80.4%

Notes. * P-value < 0.001; ^†P-value = 0.007