. Author manuscript; available in PMC: 2014 Mar 24.

Published in final edited form as: J Vasc Surg. 2012 Jun;55(6):1662–73.e2. doi: 10.1016/j.jvs.2011.12.010

Table VIb. Adjusted Associations of WIQ speed score quartiles with total and cardiovascular disease mortality among non-PAD Participants.

	HR (95% CI)	p value	p for trend
All-cause mortality
1st quartile [≤ 32.6]	1.43( 0.64 - 3.19)	0.38	0.26
2nd quartile [32.6 – 50.0]	1.06( 0.47 - 2.39)	0.89
3rd quartile [50.0 – 71.7]	0.89( 0.39 - 2.05)	0.79
4th quartile [> 71.7]	1.0 (referent)	NA
Cardiovascular disease mortality
1st quartile [≤ 32.6]	1.38( 0.35 - 5.50)	0.65	0.78
2nd quartile [32.6 – 50.0]	2.25( 0.59 - 8.61)	0.24
3rd quartile [50.0 – 71.7]	0.94( 0.21 - 4.27)	0.94
4th quartile [> 71.7]	1.0 (referent)	NA

Adjusted for age, sex, race, body mass index, smoking status, ankle brachial index, comorbidities, physical activity, statin use and ACE inhibitor use. WIQ = Walking Impairment Questionnaire; CVD = cardiovascular disease; PAD = peripheral arterial disease; HR = hazard ratio. Pairwise p value shows statistical significance relative to the 4^th quartile.