Table 3

S2D: crude and adjusted HRs

Variable	HR	95% CI	P
Crude analysis
Rural areas	0.46	0.37 to 0.57	<0.001
Adjusted model
Rural areas	0.59	0.43 to 0.81	0.001
Women	0.87	0.69 to 1.09	0.215
Age	0.98	0.97 to 0.99	<0.001
Education level (high school and above)	0.99	0.72 to 1.37	0.953
Transportation distance	0.99	0.98 to 1.01	0.233
First-visited medical institution other than Pizhou Hospital	0.91	0.73 to 1.13	0.378

S2D, symptom to door.