Table 4. Association between high altitude and hypertension subtypes.

	ISH				IDH				SDH
	cRPR	95% CI	aRPR	95% CI	cRPR	95% CI	aRPR	95% CI	cRPR	95% CI	aRPR	95% CI
In all population (N = 111,558)
0–2,500 masl	Ref.		Ref.		Ref.		Ref.		Ref.		Ref.
≥2,500 masl	0.73	0.67–0.79	0.68	0.61–0.73	1.08	0.90–1.28	1.60	1.32–1.94	0.75	0.66–0.85	0.98	0.86–1.12
By area of residence
Urban (n = 73,062)
0–2,500 masl	Ref.		Ref.		Ref.		Ref.		Ref.		Ref.
≥2,500 masl	0.59	0.52–0.68	0.64	0.55–0.73	1.26	1.01–1.58	1.57	1.24–2.00	0.76	0.64–0.90	0.91	0.76–1.09
Rural (n = 38,526)
0–2,500 masl	Ref.		Ref.		Ref.		Ref.		Ref.		Ref.
≥2,500 masl	0.91	0.81–1.01	0.68	0.60–0.78	1.35	0.99–1.82	1.66	1.22–2.26	1.09	0.90–1.33	1.09	0.89–1.34
By sex
Female (n = 62,264)
0–2,500 masl	Ref.		Ref.		Ref.		Ref.		Ref.		Ref.
≥2,500 masl	0.83	0.74–0.94	0.55	0.48–0.63	1.59	1.20–2.10	2.03	1.55–2.69	1.02	0.81–1.27	0.94	0.73–1.21
Male (n = 49,324)
0–2,500 masl	Ref.		Ref.		Ref.		Ref.		Ref.		Ref.
≥2,500 masl	0.68	0.61–0.76	0.71	0.62–0.80	0.91	0.73–1.14	1.38	1.07–1.78	0.69	0.59–0.80	0.92	0.78–1.08

RPR: Relative Prevalence Ratio; CI: Confidence Interval; ISH: Isolated Systolic Hypertension; IDH: Isolated Diastolic Hypertension: SDH: Systolic-diastolic Hypertension. masl: meters above sea level; Ref.: Reference