. 2016 Nov 22;2016:4093870. doi: 10.1155/2016/4093870

Table 2.

Simple regression analysis.

	Cathepsin S		Cystatin C		Cat S/Cys C (/10³)
	R	p	R	p	R	p
Age	0.033	0.72	0.226	0.01^∗	−0.128	0.16
Pack-Year	0.099	0.27	0.096	0.29	−0.001	0.99
BMI	0.175	0.052	−0.042	0.65	0.132	0.14
Serum Cr	0.164	0.07	0.266	0.003^∗∗	−0.093	0.30
% VC	−0.0004	0.997	−0.054	0.55	0.076	0.40
FEV₁/FVC	0.261	0.003^∗∗	−0.014	0.88	0.242	0.007^∗∗
% FEV₁ predicted	0.179	0.045^∗	−0.020	0.83	0.188	0.04^∗
PEF	0.083	0.36	−0.1664	0.07	0.199	0.03^∗
V ₅₀	0.131	0.15	−0.110	0.23	0.187	0.04^∗
% DL_CO predicted	0.089	0.37	−0.251	0.01^∗	0.277	0.005^∗∗
% DL_CO/V _A	0.197	0.046^∗	−0.120	0.23	0.244	0.01^∗
LAA	−0.228	0.01^∗	0.033	0.71	−0.233	0.009^∗∗
mPA	0.112	0.24	0.139	0.14	−0.054	0.58
abAo	0.181	0.06	0.267	0.005^∗∗	0.045	0.64
Current/Ex (51/74)	24.8/22.8	0.17	2.78/2.65	0.44	9.77/9.42	0.65
HT (+/−) (22/103)	24.5/23.4	0.57	2.74/2.70	0.57	9.68/9.54	0.85
ICS (+/−) (17/108)	20.1/24.2	0.06	2.59/2.72	0.59	8.36/9.75	0.21
M/F (116/9)	23.7/23.4	0.93	2.66/3.32	0.04^∗	9.69/7.90	0.22

^∗ p < 0.05; ^∗∗ p < 0.01. Cat: cathepsin; Cys: cystatin; BMI: body mass index; Cr: creatinine; VC: vital capacity; FEV₁/FVC: ratio of forced expiratory volume in 1 second to forced vital capacity; FEV₁: forced expiratory volume in 1 second; PEF: peak expiratory flow rate; V ₅₀: the air flow rate at 50% vital capacity; DL_CO: diffusing capacity of the lung for carbon monoxide; DL_CO/V _A: diffusing capacity of the lung for carbon monoxide divided by the alveolar volume; LAA: low attenuation area; mPA: main pulmonary artery; abAo: abdominal aorta; Ex: ex-smoker; HT: hypertension; ICS: inhaled corticosteroid; M: male; F: female.