Table 2.

Incidence rate and adjusted and unadjusted HRs of each group.

Variable	Study Group Total	Number of Cases	Incidence per 10,000-Person Years	HR Adjusted (95% CI)	HR Unadjusted (95% CI)
Group
Non-SD	22,476	131	5.12	1	1
SD	11,238	262	22.41	4.39 (3.56–5.42)	4.39 (3.55–5.42)
Sex
Female	12,676	54	3.81	1	1
Male	21,038	339	14.69	3.77 (2.83–5.03)	3.85 (2.89–5.13)
Economic status
Low (< 70%)	18,391	180	8.86	1	1
High (> 70%)	15,323	213	12.56	1.27 (1.05–1.56)	1.42 (1.16–1.73)
Residential area
Rural	23,225	247	9.61	1	1
Metropolitan	10,489	146	12.62	1.31 (1.07–1.62)	1.30 (1.06–1.59)
Age
Old (> 50 y)	9,679	140	13.01		1
Young (< 50 y)	24,035	253	9.54	0.79 (0.64–0.98)	0.73 (0.60–0.9)
HTN
No	33,444	389	10.52	1	1
Yes	270	4	13.24	1.00 (0.37–2.7)	1.26 (0.47–3.38)
DM
No	33,523	386	10.41	1	1
Yes	191	7	33.10	2.44 (1.15–5.21)	3.19 (1.51–6.74)
CKD
No	33,692	393	10.55
Yes	22	0	0

CI = confidence interval, CKD = chronic kidney disease, DM = diabetes mellitus, HR = hazard ratio, HTN = hypertension, SD = septal deviation.