Table Info

Table 3.

Univariate binary logistic regression analysis of RA-ILD and RA-non ILD

Factors	RR	95% CI	P
Age, year, mean (SD)	1.06	1.01–1.12	0.04
Smoking, n (%)	1.02	0.13–8.20	0.99
Disease duration, median (IQR)	1.02	0.96–1.09	0.46
DAS28-ESR score, mean (SD)	1.06	0.58–1.93	0.86
HAQ score, median (IQR)	3.05	1.25–7.45	0.02
Breathlessness, n (%)	57.08	11.59–281.23	< 0.001
Basal crackles, n (%)	248.42	44.93–1,373.60	< 0.001

DAS28-ESR: Disease Activity Score in 28 joints using Erythrocyte Sedimentation Rate; HAQ: Health Assessment Questionnaire; IQR: interquartile range; ESR: erythrocyte sedimentation rate; ILD: interstitial lung disease; RA: rheumatoid arthritis; RR: relative risk

Declarations

Acknowledgments

The authors thank the participants in the outpatient rheumatology clinic for their cooperation. The authors also thank Khemajira Karaketklang, B.Sc. (Nursing), MPH, for statistical analysis; and Bhoom Suktitipat, MD, Ph.D. and Nutchavadee Vorasan, M.Sc. (Tropical Medicine), for database management.

Author contributions

BSU: Conceptualization, Investigation, Writing—original draft, Writing—review & editing. SD: Conceptualization, Investigation, Writing—original draft, Writing—review & editing. SW: Investigation, Writing—review & editing. KB: Investigation, Writing—review & editing. WK: Conceptualization, Investigation, Writing—original draft, Writing—review & editing, Supervision. All authors read and approved the submitted version.

Conflicts of interest

The authors declare that they have no conflicts of interest.

Ethical approval

This study adhered to the ethical principles of the Declaration of Helsinki (1964) and its subsequent provisions, and it was approved by the Institutional Review Board of Siriraj Hospital, Mahidol University (approval no. Si177/2022).

Consent to participate

Informed consent to participate in the study was obtained from all participants.

Consent to publication

Not applicable.

Availability of data and materials

The data are available from the corresponding author upon reasonable request.

Funding

Not applicable.

Copyright

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