Table 2

Baseline patient characteristics by SDAI remission or LDA at 1 year by radiographs and HAQ-DI score available at 3 years

Patient characteristicsPatients with radiographs at 3 years, n=496Patients with HAQ-DI at 3 years, n=535
Remission at 1 year n=94LDA at 1 year
n=178
p ValueRemission at 1 year
n=103
LDA at 1 year n=198p Value
No. observedNo. observedNo. observedNo. observed
Baseline characteristics
 Age, years, mean (SD)9444.3 (11.9)17851.3 (11.3)<0.000110343.4 (12.0)19851.2 (11.2)<0.0001
 Gender, number of females (%)9474 (78.7)178134 (75.3)0.610383 (80.6)198147 (7.2)0.3
 Disease duration, months, mean (SD)946.9 (8.3)1788.0 (9.5)0.31036.5 (8.0)1988.1 (9.5)0.1
 RF presence, number (%)9451 (54.3)17898 (55.1)1.010358 (56.3)198112 (56.6)0.9
 ACPA
  ▸ Absence, number (%)9449 (52.1)17893 (52.2)0.610352 (50.5)198100 (50.5)0.5
  ▸ Low titre, number (%)9412 (12.8)17816 (9.0)10313 (12.6)19817 (8.6)
  ▸ High titre, number (%)9433 (35.1)17869 (38.8)10338 (36.9)19881 (40.9)
 Smokers, number (%)9447 (50)17879 (44)0.510351 (49.5)19889 (44.9)0.5
 mTSS, mean (SD)944.2 (5.8)1786.5 (9.4)0.471014.2 (5.7)1886.5 (9.2)0.0321
 HAQ-DI, mean (SD)940.8 (0.6)1780.9 (0.7)0.21030.9 (0.6)1980.9 (0.7)0.5
 Patients with erosive disease, number (%)9425 (26.6)17867 (37.6)0.0910125 (24.3)18873 (36.9)0.04
  • ACPA, anticitrullinated peptides antibodies; no, low and high titres of ACPA by anti-CCP2 antibodies definition was <50, 50–150 and >150 U/mL, respectively; HAQ-DI, Health Assessment Questionnaire Disability Index; LDA, low disease activity; mTSS, modified Sharp–van der Heijde total score; RF, rheumatoid factor; SDAI, Simple Disease Activity Index. p<0.05 values are shown in bold.