Table 3.

Correlations coefficients of plasma biomarkers with walking speed and daily steps count at various time points (N = 64–68/group/time point). The numbers in parenthesis indicate p-values.

			Non-COPD	COPD GOLD 1 and 2	COPD GOLD 3 and 4	All Participants
Baseline	eHSP72 CAF22	Walking speed	0.034 (0.074)	0.027 (0.128)	0.026 (0.094)	0.052 (0.042)
		Step count	0.013 (0.127)	0.024 (0.134)	0.041 (0.106)	0.062 (0.055)
		Walking speed	0.223 (0.034)	0.151 (0.053)	0.252 (0.024)	0.305 (<0.001)
		Step count	0.149 (0.067)	0.212 (0.004)	0.241 (0.003)	0.364 (<0.001)
12-month	eHSP72 CAF22	Walking speed	0.038 (0.077)	0.047 (0.113)	0.011 (0.123)	0.082 (0.048)
		Step count	0.035 (0.171)	0.106 (0.091)	0.063 (0.137)	0.089 (0.077)
		Walking speed	0.161 (0.004)	0.246 (0.014)	0.202 (0.013)	0.395 (<0.001)
		Step count	0.217 (0.007)	0.143 (0.003)	0.159 (0.002)	0.263 (<0.001)
24-month	eHSP72 CAF22	Walking speed	0.006 (0.186)	0.019 (0.106)	0.055 (0.087)	0.076 (0.076)
		Step count	0.024 (0.133)	0.037 (0.119)	0.083 (0.085)	0.183 (0.033)
		Walking speed	0.147 (0.003)	0.164 (0.021)	0.123 (0.005)	0.329 (<0.001)
		Step count	0.084 (0.041)	0.135 (0.017)	0.117 (0.022)	0.236 (<0.001)