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Figure 1 Hazard Ratios for Mobility Loss at 50-Month Follow-Up Among Men and Women With PAD, According to Baseline Functional Performance
Model 1: adjusts for age, gender, race, ankle-brachial index, body mass index, pack-years of cigarette smoking, leg symptoms, walking exercise frequency, and comorbidities. Model 2: Adjusts for variables in model 1 and blocks walked for exercise. Categories of performance: 6-min walk = Category 1 (lowest quartile):  1,001 ft; Category 2 (second quartile): 1,001 to 1,304 ft; Category 3 (third and fourth quartiles combined): >1,304 ft. 4-m walk (usual pace) = Category 1 (lowest quartile): 0.792 m/s; Category 2 (second quartile): 0.792 to 0.915 m/s; Category 3 (third and fourth quartiles combined): >0.915 m/s. 4-m walk (fast pace) = Category 1 (lowest quartile): 1.078 m/s; Category 2 (second quartile): 1.078 to 1.274 m/s; Category 3 (third and fourth quartiles combined): >1.274 m/s. Short Physical Performance Battery (0 to 12 scale, 12 = best) = Category 1: 1 to 8; Category 2: 9 to 10; Category 3: 11 to 12. *p < 0.01 relative to the highest 2 categories; **p < 0.05 relative to the highest 2 categories. PAD = peripheral arterial disease.
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