Table 2.

The result of multivariate linear regression analysis.

Sample	Variable	Unadjusted model					Adjusted model
		B	Robust SE	β	P	95% CI of B	B	Robust SE	β	P	95% CI of B
Total sample	Health literacy	0.280	0.021	0.241	<0.001	0.238–0.321	0.258	0.022	0.223	<0.001	0.215–0.302
	Digital skill	0.767	0.023	0.616	<0.001	0.722–0.813	0.654	0.034	0.525	<0.001	0.587–0.720
By sex
Male	Health literacy	0.308	0.031	0.247	<0.001	0.247–0.369	0.302	0.032	0.243	<0.001	0.239–0.366
	Digital skill	0.756	0.033	0.614	<0.001	0.692–0.819	0.615	0.048	0.500	<0.001	0.520–0.709
Female	Health literacy	0.243	0.029	0.220	<0.001	0.186–0.300	0.217	0.030	0.197	<0.001	0.159–0.275
	Digital skill	0.782	0.033	0.624	<0.001	0.718–0.846	0.698	0.048	0.558	<0.001	0.604–0.791
By age group
60–69 years	Health literacy	0.374	0.039	0.293	<0.001	0.297–0.451	0.337	0.040	0.264	<0.001	0.258–0.416
	Digital skill	0.651	0.035	0.572	<0.001	0.582–0.720	0.560	0.047	0.492	<0.001	0.467–0.652
70–79 years	Health literacy	0.259	0.028	0.229	<0.001	0.203–0.315	0.244	0.030	0.216	<0.001	0.185–0.302
	Digital skill	0.865	0.033	0.631	<0.001	0.801–0.928	0.808	0.044	0.590	<0.001	0.722–0.894
≥80 years	Health literacy	0.206	0.048	0.236	<0.001	0.111–0.301	0.207	0.053	0.237	<0.001	0.102–0.312
	Digital skill	0.645	0.110	0.472	<0.001	0.428–0.861	0.346	0.137	0.253	0.012	0.076–0.615
By residence
Urban residents	Health literacy	0.285	0.040	0.213	<0.001	0.206–0.363	0.265	0.043	0.198	<0.001	0.181–0.348
	Digital skill	0.742	0.034	0.629	<0.001	0.675–0.810	0.617	0.052	0.523	<0.001	0.515–0.719
Rural residents	Health literacy	0.274	0.024	0.261	<0.001	0.226–0.322	0.250	0.026	0.239	<0.001	0.200–0.300
	Digital skill	0.803	0.034	0.586	<0.001	0.737–0.869	0.689	0.043	0.502	<0.001	0.605–0.772

Note: β: standardized regression coefficient; B: unstandardized regression coefficient; CI: confidence interval; SE: standard errors.