Table 3.

Multiple linear regression analysis for each amino acid to BMI, albumin, and %FEV₁

Amino acid	BMI		Albumin		%FEV1
	SPRC	P-value	SPRC	P-value	SPRC	P-value
Total amino acids	−0.0151	NS	0.3540	NS	0.3330	NS
Alanine	−0.0253	NS	0.3578	NS	0.2688	NS
Arginine	−0.0063	NS	0.2076	NS	0.3009	NS
Asparagine	0.0355	NS	0.1681	NS	0.3563	NS
Aspartic acid	0.0394	NS	0.1293	NS	0.0760	NS
Citrulline	−0.0990	NS	0.2353	NS	−0.2030	NS
Cystine	−0.0776	NS	0.1586	NS	0.3808	NS
Glycine	−0.0630	NS	0.0453	NS	0.4066	NS
Glutamine	−0.0396	NS	0.4202	NS	0.0786	NS
Glutamic acid	0.2965	NS	0.6426	<0.01	0.0726	NS
Histidine	−0.0086	NS	0.0182	NS	0.1317	NS
Isoleucine	−0.0162	NS	0.0636	NS	0.4847	<0.05
Leucine	−0.2177	NS	0.1295	NS	0.4552	<0.05
Lysine	0.1104	NS	0.1490	NS	0.138	NS
Methionine	−0.1781	NS	0.1768	NS	0.5474	<0.05
Ornithine	−0.1390	NS	-0.1803	NS	0.2480	NS
Phenylalanine	−0.4507	,0.05	−0.1849	NS	0.5842	<0.01
Proline	0.1395	NS	0.2133	NS	0.2118	NS
Serine	−0.1125	NS	0.1500	NS	0.4255	NS
Threonine	0.0934	NS	0.1884	NS	0.3230	NS
Tryptophan	−0.1388	NS	0.4474	<0.05	0.4078	<0.05
Tyrosine	−0.1068	NS	0.1286	NS	0.5897	<0.01
Valine	−0.01683	NS	0.0896	NS	0.3545	NS

Notes: Multiple linear regression analysis for each amino acid, combined group A and group B; NS, P>0.05.

Abbreviations: BMI, body mass index; %FEV₁, percentage of predicted value for forced expiratory volume in 1 second; NS, not statistically significant; SPRC, standardized partial regression coefficient.