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Figure 2 Hazard Ratios for Mobility Loss at 50-Month Follow-Up Among Men and Women Without PAD, According to Baseline Functional Performance

Model 1: adjusts for age, gender, race, body mass index, pack-years of cigarette smoking, 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): 0.797 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 < 0.05 relative to the highest 2 quartiles; **p < 0.001 relative to the highest 2 quartiles. PAD = peripheral arterial disease.