Table 3.

Multivariate linear analysis of SMI and ASMI, with T-score by part

	Femur T-score			Femur neck T-score			Lumbar T-score
	β	SE	P-value	β	SE	P-value	β	SE	P-value
Asthma
SMI	0.176	0.069	0.199	0.007	0.07	0.954	0.092	0.087	0.487
ASMI	0.069	0.125	0.582	−0.097	0.124	0.435	−0.037	0.154	0.811
COPD
SMI	0.327	0.02	,0.001	0.265	0.021	,0.001	0.232	0.029	,0.001
ASMI	0.323	0.041	,0.001	0.262	0.042	,0.001	0.307	0.060	,0.001
ACOS
SMI	0.373	0.054	0.002	0.206	0.053	0.044	0.25	0.08	0.037
ASMI	0.34	0.107	0.002	0.271	0.103	0.01	0.389	0.157	0.015

Notes: SMI adjusted for age, sex, height, FMI, smoking frequency, levels of blood vitamin D, PTH, ALP and FEV₁ (%). ASMI adjusted for age, sex, height, AFMI, smoking frequency, levels of blood vitamin D, PTH, ALP and FEV₁ (%).

Abbreviations: SMI, skeletal muscle mass index; ASMI, appendicular skeletal muscle mass index; B, standardized regression coefficient; SE, standard error; COPD, chronic obstructive pulmonary disease; ACOS, asthma–COPD overlap syndrome; FMI, fat mass index; PTH, parathyroid hormone; ALP, alkaline phosphatase; FEV₁, forced expiratory volume in 1 sec; AFMI, appendicular fat mass index.