Table 2.

Cox proportional hazard regression models of time to complication event.

	Univariate		Multivariate
	Hazard ratio (95% CI)	p-value	Hazard ratio (95% CI)	p-value
Group
Vulnerable and Outside region	1.465 (1.418, 1.513)	<0.0001	1.156 (1.119, 1.195)	<0.0001
Vulnerable and Inside region	1.146 (1.116, 1.177)	<0.0001	1.045 (1.017, 1.073)	0.0015
Non-vulnerable and Outside region	1.149 (1.131, 1.167)	<0.0001	1.042 (1.025, 1.059)	<0.0001
Non-vulnerable and Inside region	Ref		Ref
Sex
Male	1.3001 (0.986, 1.015)	0.9184	1.158 (1.139, 1.177)	<0.0001
Female	Ref		Ref
Income
Low	0.981 (0.960, 1.003)	0.0876	1.036 (1.013, 1.059)	0.0017
Middle	0.936 (0.922, 0.951)	<0.0001	1.021 (1.005, 1.037)	0.0113
High	Ref		Ref
Coverage type
NHI, employed/ self-employed	0.847 (0.834, 0.859)	<0.0001	0.954 (0.937, 0.970)	<0.0001
Medical aid	Ref		Ref
Age (years)
Under 10	1.310 (1.234, 1.390)	<0.0001	1.435 (1.352, 1.523)	0.0001
10–19	0.094 (0.072, 1.121)	<0.0001	0.092 (0.071, 0.119)	<0.0001
20–29	0.186 (0.170, 0.204)	<0.0001	0.183 (0.166, 0.200)	<0.0001
30–39	0.297 (0.285, 0.309)	<0.0001	0.302 (0.290, 0.315)	<0.0001
40–49	0.403 (0.394, 0.413)	<0.0001	0.413 (0.402, 0.423)	<0.0001
50–59	0.535 (0.524, 0.547)	<0.0001	0.535 (0.524, 0.547)	<0.0001
60–69	0.722 (0.707, 0.737)	<0.0001	0.714 (0.700, 0.729)	<0.0001
Over 70	Ref		Ref
Charlson comorbidity index
0	0.623 (0.612, 0.635)	<0.0001	0.667 (0.655, 0.679)	<0.0001
1	0.806 (0.792, 0.820)	<0.0001	0.824 (0.810, 0.838)	<0.0001
Over 2	Ref		Ref
Healthcare facility
Tertiary Hospital	1.646 (1.621, 1.671)	<0.0001	1.707 (1.680, 1.734)	<0.0001
Primary Care Hospital	Ref		Ref