. Author manuscript; available in PMC: 2010 Oct 1.

Published in final edited form as: Respir Med. 2009 May 21;103(10):1468–1476. doi: 10.1016/j.rmed.2009.04.019

Table 2.

Adjusted hazard ratios for all-cause mortality according to FEV1/FVC cut-points (N = 2,406)^*

FEV1/FVC Models ^†	No. (%) of participants below cut-point	No. (%) of deaths among participants below cut-point	Hazard Ratio for Mortality (95% CI)	p-value
< .80	1,941 (80.7)	693 (35.7)	1.07 (0.90, 1.28)	.440
< .75	1,376 (57.2)	529 (38.4)	1.11 (0.96, 1.28)	.152
< .70	831 (34.5)	364 (43.8)	1.23 (1.03, 1.47)	.020
< .65	454 (18.9)	229 (50.4)	1.33 (1.12, 1.58)	.002
< .60	241 (10.0)	136 (56.4)	1.42 (1.15, 1.76)	.002
< .55	136 (5.6)	92 (67.6)	1.67 (1.33, 2.09)	< .001

Abbreviations: FEV1= forced expiratory volume in 1 second; FVC= forced vital capacity; CI= confidence interval; BMI= body mass index.

74 participants (3.0%) had missing covariates.

^†

Each FEV1/FVC cut-point represents a separate Cox regression model, adjusted for age, age², height, sex, ethnicity, smoking history, BMI, BMI², BMI³, memory impairment, self-reported health status by time interaction, and chronic conditions. The referent group for each FEV1/FVC cut-point is the population above the specified cut point.