Table 1

Included persons, 2007–2020

20072008200920102011201220132014201520162017201820192020
>18 years, in million8.17.07.17.17.17.37.47.57.47.37.37.27.17.1
RA diagnosis, in 1000989396102103106112117120138141143144143
RA+DMARD, in 10004141444852555963666878818385
Prevalent ILD25763284010331130118612851351140614631553154815411484
Incident ILD18638288947012512011412515714114590
  • Required for inclusion: RA: 1 inpatient or ≥2 outpatient ICD-10 codes M05, M06 in the respective year AND a prescription of a DMARD (ever). Prevalent ILD in RA: 1 inpatient or ≥2 outpatient ICD-10 codes of J84.1, 8, 9; M05.1+J99.0 in the respective year+≥1 lung diagnostic procedure code (ever). Incident ILD in RA: no ILD diagnosis in all years prior to the index year.

  • DMARD, disease-modifying antirheumatic drug; ICD-10, International Statistical Classification of Diseases; ILD, interstitial lung disease; RA, rheumatoid arthritis.