Table 2

Characteristics of persons with rheumatoid arthritis (RA) and prevalent interstitial lung disease from 2007 to 2020

20072008200920102011201220132014201520162017201820192020
N25763284010331130118612851351140614631553154815411484
Age, mean, years (SD)66 (10)66 (10)67 (10)67 (10)67 (10)68 (10)69 (10)69 (10)70 (10)70 (10)71 (10)71 (10)72 (10)72 (10)
31–50 years108676643433332
51–70 years5557575350484544424241414039
>70 years3535363943475153545555565759
Female6769686870696869686768686969
M05: seropositive RA4642434242434342434546474845
Comorbidities
 Hypertension5860626263646667686869697070
 Coronary heart disease1920211920202223242526262626
 Pulmonary hypertension64433455556665
 Gastrointestinal reflux1115161617171819202021222324
 COPD2623202221222425272728292828
 Diabetes mellitus2122212223252525262627272726
 Asthma1312121313131415161718201919
Specialised care
 Rheumatology caren.a.66686967686867666565656562
 Pulmonology caren.a.39464240404344464750495353
Outpatient lung diagnostics*
 CT5963656768717172747474757575
 Bronchoalveolar lavage65666665565555
 X-ray9093949595969696969695959595
 Functional tests6362606059595959605959595857
 Biopsy2121222222232223232121212020
 Spirometry3947505251525253535353525252
 Bronchoscopy6153535353525253525150494848
  • Numbers are percentages unless otherwise indicated.

  • *Anytime in 2005–2020.

  • COPD, chronic obstructive pulmonary disease; n.a., not applicable.