Table 4 Univariate and multivariate analyses of spirometry and IOS parameters associated with patients with rheumatoid arthritis with abnormal findings in HRCT

Age > 65 years

20.31

2.36–174.7

0.006

44.04

2.65–732.1

0.008

13.41

1.47–121.8

0.021

Anti-CCP

1.002

0.99–1.01

0.124

CRP

6.172

0.32–118.5

0.227

R5 > 150%

1.031

1.01–1.06

0.013

R20 > 150%

1.023

0.99–1.05

0.083

R5-R20 > 0.07

2.671

0.69–10.33

0.154

0.126

0.008–1.87

0.132

AX > 0.44

7.466

1.79–30.99

0.006

3.348

0.267–41.98

0.349

Fres > 14.14

9.629

2.33–43.01

0.003

18.01

1.15–282.7

0.039

X5 < -0.12

1.450

0.30–6.91

0.641

FVC < 80%

539E + 006

-

0.997

FEV1/FVC < 70%

2.001

0.211–18.95

0.545

MMEF < 65%

8.250

1.58–43.02

0.012

4.421

0.736–26.53

0.104

DLCO < 76%

1.385

0.381–5.034

0.621