Relationship between anxiety and depression, dyspnea severity, and pulmonary function in connective tissue disease-associated interstitial lung disease

Table 1 General data of patients

Indicators	Data	χ2/t	P value
Age (years)	59.24 ± 10.51	1.733	0.086
BMI (kg/m2)	23.67 ± 3.18	1.294	0.199
Smoking history
Yes	42	2.763	0.096
No	58
Systemic sclerosis (n)	40	-	-
CRP (mg/L)	11.25 ± 6.34	2.184	0.031
ESR (mm/h)	29.17 ± 12.58	2.659	0.009
FVC (%)	67.89 ± 12.73	3.502	0.001
DLCO (%)	55.32 ± 13.95	3.761	< 0.001
mMRC (points)	1.87 ± 0.98	2.816	0.006
GAD-7 (points)	7.14 ± 4.03	3.945	< 0.001
PHQ-9 (points)	8.76 ± 4.85	4.118	< 0.001

P < 0.05 indicated significant difference. BMI: Body mass index; FVC: Forced vital capacity; DLCO: Diffusing capacity of the lungs for carbon monoxide; CRP: C-reactive protein; ESR: Erythrocyte sedimentation rate; mMRC: Modified medical research council; GAD-7: Generalized anxiety disorder-7; PHQ-9: Patient health questionnaire-9.