Table 3. Multivariate Analyses of the Relationship Between Various Clinical Factors and Mortality.

Prognosis factors	β	HR (95% CI)	P valuea
NSAIDs, absent vs. present	1.536	4.646 (1.725 - 12.510)	0.002
SBP, <100 mm Hg vs. ≥ 100 mm Hg	1.675	5.341 (2.204 - 12.942)	< 0.001
COPD, absent vs. present	1.349	3.855 (1.417 - 10.489)	0.008

^aCox regression for mortality. NSAIDs: non-steroidal anti-inflammatory drugs; SBP: systolic blood pressure; COPD: chronic obstructive pulmonary disease; HR: hazard ratio; CI: confidence interval.