Item	Regression coefficient	Standard error	Wald c²	P	OR值	Lower limit of 95% CI	Upper limit of 95% CI
Comparison of C1 and C4
constant term	0.668	0.738	0.819	0.365	―	―	―
Age
18 - 59	−0.174	0.773	0.051	0.822	0.84	0.185	3.82
60 - 79	−0.417	0.723	0.334	0.563	0.659	0.16	2.715
Average monthly income
<1000	−1.836	0.777	5.587	0.018	0.159	0.035	0.731
1001 - 3000	−1.367	0.773	3.131	0.077	0.255	0.056	1.159
3001 - 5000	−1.192	0.722	2.729	0.099	0.304	0.074	1.249
Comparison of C2 and C4
Constant term	2.004	0.625	10.278	0.001	―	―	―
Age
18 - 59	−1.544	0.646	5.719	0.017	0.214	0.06	0.757
60 - 79	−1.414	0.576	6.018	0.014	0.243	0.079	0.753
Average monthly income
<1000	−1.692	0.676	6.273	0.012	0.184	0.049	0.692
1001 - 3000	−0.575	0.659	0.76	0.383	0.563	0.155	2.048
3001 - 5000	−1.591	0.669	5.658	0.017	0.204	0.055	0.756
Comparison of C3 and C4
Constant term	1.323	0.648	4.175	0.041	―	―	―
Age
18 - 59	−0.455	0.627	0.528	0.468	0.634	0.186	2.166
60 - 79	−0.7	0.58	1.457	0.227	0.497	0.159	1.547
Average monthly income
<1000	−1.217	0.646	3.55	0.06	0.296	0.083	1.05
1001 - 3000	−0.714	0.656	1.187	0.276	0.49	0.135	1.769
3001 - 5000	−0.863	0.634	1.851	0.174	0.422	0.122	1.463