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Table 2 Associations with quadriceps strength

From: Association between peripheral muscle strength, exercise performance, and physical activity in daily life in patients with Chronic Obstructive Pulmonary Disease

Variable Coefficient β 95% CI p
Daily physical activity
MET (kcal/24 h/kg) 0.100 -0.371 – 0.582 0.650
TEEACC (kcal/day) 0.274 -0.171 – 0.749 0.206
PAL 0.092 -0.345 – 0.516 0.684
Steps/day (n) -0.085 -0.567 – 0.387 0.699
Exercise performance
6MWD (m) 0.451 0.085 – 0.835 0.018
Sit-to-Stand test (n) 0.502 0.105 – 0.857 0.015
Handgrip test (kg) 0.455 0.050 – 0.837 0.029
Time < 3METs (min) -0.055 -0.811 - 0.434 0.822
Time 3–6 METs (min) 0.449 -0.111 – 1.010 0.080
  1. Univariate regression is expressed as β. 6MWD, 6-minute walk distance, MET, metabolic equivalent; PAL, physical activity level; TEEACC, total energy expenditure per day as assessed by accelerometry. P < 5% is significant.