TABLE 3.

Correlation assessment between PMA and PMT measurements and baseline characteristics in COPD.

	PMA	95% CI	p value	PMT	95% CI	p value
Sex, male	0.518	0.416 to 0.610	<0.001***	0.455	0.323 to 0.575	<0.001***
Age, years	−0.498	–0.595 to −0.397	<0.001***	−0.209	–0.350 to −0.070	0.008**
Height, cm	0.382	0.263 to 0.482	<0.001***	0.263	0.121 to 0.400	<0.001***
Weight, Kg	0.569	0.444 to 0.677	<0.001***	0.081	–0.081 to 0.227	0.292
Current smoking	0.044	–0.124 to 0.184	0.564	0.070	–0.088 to 0.202	0.362
BMI, Kg/m2	0.469	0.323 to 0.592	<0.001***	−0.064	–0.205 to 0.079	0.407
Adjusting for age, sex, BMI, and current smoking status
Emphysema percentage	−0.157	–0.301 to −0.017	0.045*	−0.155	–0.289 to −0.021	0.048*
TAC of RB1	0.205	0.038 to 0.362	0.009**	0.237	0.061 to 0.386	0.002**
Adjusting for age, sex, BMI, current smoking status, emphysema percentage and TAC of RB1
PMT, HU	0.254	0.114 to 0.385	0.001**

BMI, body mass index; RB1, apical bronchus of right upper lobe; PMA, pectoralis muscle cross-sectional area; PMT, pectoralis muscle attenuation; TAC, total airway count; COPD, chronic obstructive lung disease; CI, confidence interval. ***p < 0.001, **p < 0.01, *p < 0.05.