Table 4.

The effect of basic medical insurance participation on variation of primary care with cohort.

Model 6 (N = 81,276)
	Estimate	Standard error	OR	95%CI
				Lower	Upper
Fix effect
Intercept	0.851*	0.283	2.342	1.067	5.140
Control variables	-	-
Basic medical insurance (reference: None)
NRCMS	0.751***	0.046	2.118	1.930	2.325
URBMI	−0.473***	0.053	0.623	0.560	0.694
UEBMI	−0.655***	0.051	0.520	0.469	0.576
Variance components
Period	0.384+	0.272
Cohort	0.002	0.003
Basic medical insurance *cohort	0.007**	0.003
Random effect
Period	-	-
Cohort
NRCMS*cohort pre1935	0.142+	0.074	1.153	0.997	1.333
NRCMS*cohort1986	−0.157**	0.052	0.855	0.772	0.947
NRCMS*cohort1991	−0.096+	0.057	0.909	0.813	1.015
UEBMI*cohort1991	0.156**	0.007	1.169	1.017	1.344
Model fit
−2RLPL		389596.800
c 2		84765.760
c2/df		0.990

+, *, **, ***denotes significant at the significant at the significance level of 0.10, 0.05, 0.01, 0.001, respectively.