TABLE 2.

HAZARD RATIOS OF ALL-CAUSE MORTALITY ASSOCIATED WITH SOCIOECONOMIC STATUS TERTILES

	Socioeconomic Status Tertiles
Adjustment	Low (n = 73)	Middle (n = 90)	High (n = 99)	P for Trend
Deaths (n, %)	30 (41.4)	21 (23.3)	13 (13.1)
Model 1*	3.65 (1.88–7.02)	1.88 (0.94–3.76)	1.0	<0.001
Model 2†	2.87 (1.47–5.62)	1.89 (0.94–3.80)	1.0	0.008
Model 3‡	2.98 (1.51–5.89)	1.79 (0.89–3.63)	1.0	0.006

Data are presented as hazard ratio (95% confidence interval) unless otherwise stated.

^*Model 1: adjusted for age and sex.

^†Model 2: Model 1 plus adjustment for World Health Organization functional classification and pulmonary vascular resistance.

^‡Model 3: Model 2 plus adjustment for phosphodiesterase type 5 inhibitors, endothelin receptor antagonists, and prostanoids.