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. 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 Va. Adjusted Associations of WIQ distance score quartiles with total and cardiovascular disease mortality among PAD Participants. (n = 638).

HR (95% CI) p value p for trend
All-cause mortality
1st quartile [≤ 14.5] 1.22 (0.79 - 1.88) 0.38 0.20
2nd quartile [14.5 – 37.1] 1.49 (0.98 - 2.25) 0.06
3rd quartile [37.1 – 67.9] 1.26 (0.84 - 1.89) 0.27
4th quartile [> 67.9] 1.0 (referent) NA
Cardiovascular disease mortality
1st quartile [≤ 14.5] 1.30 (0.60 - 2.81) 0.51 0.51
2nd quartile [14.5 – 37.1] 1.13 (0.51 - 2.50) 0.77
3rd quartile [37.1 – 67.9] 1.30 (0.63 - 2.69) 0.48
4th quartile [> 67.9] 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 4th quartile.