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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Atherosclerosis. 2018 Mar 22;272:200–206. doi: 10.1016/j.atherosclerosis.2018.03.037

Table 2.

Linear and logistic regressions of ABI tertiles on physical performance and fatigability

Outcomes 1st tertile
(ABI: 1.0–1.13)		 2nd Tertile
(ABI: 1.13–1.19)
Performance Time to complete LDCW, seconds β coefficient [95% CI] β coefficient [95% CI]
Unadjusted 14.44 [4.235, 24.649] 8.55 [−1.744, 18.839]
Model 1 10.28 [1.826, 18.736] 3.88 [−4.622, 12.376]
Model 2 10.51 [2.048, 18.966] 5.42 [−3.089, 13.934]
Poor walking endurance OR [95% CI] OR [95% CI]
Unadjusted 2.14 [1.32, 3.46] 1.14 [0.68, 1.93]
Model 1 2.08 [1.08, 3.66] 0.89 [0.49, 1.63]
Model 2 2.20 [1.23, 3.95] 0.95 [0.51, 1.77]
Model 3 2.05 [1.14, 3.69] 0.89 [0.48, 1.68]
VO2 peak, mL/Kg/min β coefficient [95% CI] β coefficient [95% CI]
Unadjusted −1.50 [−2.524, −0.479] −0.20 [−1.234, 0.829]
Model 1 −1.21 [−2.074, −0.350] 0.06 [−0.813, 0.925]
Model 2 −1.29 [−2.148, −0.440] −0.18 [−1.055, 0.692]
HABC PPB, score β coefficient [95% CI] β coefficient [95% CI]
Unadjusted −0.14 [−0.243, −0.040] −0.01 [−0.117, 0.088]
Model 1 −0.14 [−0.233, −0.057] −0.001 [−0.093, 0.084]
Model 2 −0.16 [−0.246, −0.075] −0.03 [−0.116, 0.057]
Fatigability High perceived fatigability OR [95% CI] OR [95% CI]
Unadjusted 1.71 [1.11, 2.64] 1.54 [0.99, 2.38]
Model 1 1.59 [1.02, 2.51] 1.42 [0.89, 2.25]
Model 2 1.59 [1.01, 2.54] 1.47 [0.92, 2.35]
Model 3 1.55 [0.97, 2.47] 1.45 [0.90, 2.33]
RPE, score β coefficient [95% CI] β coefficient [95% CI]
Unadjusted 0.40 [−0.076, 0.884] 0.57 [0.093, 1.051]
Model 1 0.34 [−0.109, 0.785] 0.46 [0.015, 0.905]
Model 2 0.44 [0.000, 0.889] 0.55 [0.106, 0.989]
Model 3 0.40 [−0.043, 0.838] 0.51 [0.068, 0.941]

Third tertile is the reference group for all the models: β coefficients are differences compared to third tertile; OR are relative to the odds of binary outcomes for the third tertile.

Bold font indicates a statistically significant difference or odds compared to third tertile (p-value <0.05.)

Model 1: adjusted for age sex race BMI.

Model 2: adjusted for Model 1+ history of congestive heart failure, coronary heart disease, hypertension, diabetes, hypercholesterolemia, smoking, TLAC and height (only time to complete LDCW and poor walking endurance).

Model 3: adjusted for Model 2+ tiredness, low energy.

TLAC, average of minute logged activity counts per day; RPE: Borg rating of perceived exertion (6–20); VO2 peak: peak rete of oxygen consumption in the 400-meter walk; HABC PPB: health ABC physical performance battery score (0–4); poor walking endurance: taking more than 300 seconds to complete the 400-meter walk of the long-distance corridor walk, or being unable to do so; high perceived fatigability: RPE≤10.