Table 5.

Assessment of independent contributors to total walking time in patients with COPD

	B	β	P-value	95% CI
	594.19		P < 0.001	311.38–877.01
Age	−7.18	−0.58	P = 0.001	−10.75 to −3.61
6MWD	0.23	0.56	P = 0.001	0.11–0.35

Notes: R² = 0.71, analysis of variance, P < 0.001; B, partial regression coefficient; β, standardized partial regression coefficient.

Abbreviations: 6MWD, six-minute walking distance; CI, confidence interval; COPD, chronic obstructive pulmonary disease.