Table 3

Musculoskeletal (MSK) imaging before and after diagnosis in patients with inflammatory arthritis, by sex of the patients

MSK imagingRheumatoid arthritis (RA)Ankylosing spondylitis (AS)Psoriatic arthritis (PsA)
Male, N (%)Female, N (%)Male, N (%)Female, N (%)Male, N (%)Female, N (%)
Before diagnosis
 X-ray
  Year 33817 (30.1)9674 (33.9)1093 (27.4)1424 (34.2)835 (28.2)1180 (33.9)
  Year 24409 (34.7)10 943 (38.3)1211 (30.4)1564 (37.6)1013 (34.2)1349 (38.7)
  Year 19313 (73.3)20 906 (73.2)2754 (69.0)2726 (65.5)1976 (66.7)2375 (68.2)
 Ultrasound
  Year 3557 (4.4)1413 (4.9)127 (3.2)201 (4.8)120 (4.0)195 (5.6)
  Year 2727 (5.7)1772 (6.2)129 (3.2)234 (5.6)149 (5.0)221 (6.3)
  Year 11997 (15.7)4689 (16.4)330 (8.3)472 (11.3)330 (8.3)472 (11.3)
 CT scan
  Year 3227 (1.8)462 (1.6)66 (1.7)80 (1.9)35 (1.2)63 (1.8)
  Year 2258 (2.0)488 (1.7)105 (2.6)79 (1.9)45 (1.5)56 (1.6)
  Year 1372 (2.9)671 (2.3)193 (4.8)180 (4.3)68 (2.3)68 (2.0)
 MRI
  Year 3779 (6.1)1792 (6.3)324 (8.1)423 (10.2)163 (5.5)250 (7.2)
  Year 2851 (6.7)2022 (7.1)354 (8.9)477 (11.5)212 (7.2)271 (7.8)
  Year 11608 (12.7)3421 (12.0)1037 (26.0)1215 (29.2)378 (12.8)500 (14.4)
After diagnosis (year 1)
 X-ray7046 (56.4)17 107 (60.4)2150 (54.1)2231 (53.8)1881 (63.6)2299 (66.1)
 Ultrasound1885 (15.1)4785 (16.9)312 (7.8)461 (11.1)402 (13.6)598 (17.2)
 CT scan279 (2.2)608 (2.1)99 (2.5)123 (3.0)72 (2.4)85 (2.4)
 MRI1447 (11.6)3430 (12.1)1193 (30.0)1340 (32.3)499 (16.9)627 (18.0)
  • Denominator for RA cohort in year 1 after index date: male patients—12 488, female patients—28 339.

  • Denominator for AS cohort in year 1 after index date: male patients—3975, female patients—4149.

  • Denominator for PsA cohort in year 1 after index date: male patients—2957, female patients—3478.

  • Bolded results are statistically significant (standardised difference >0.1).