Table 4

Laboratory tests before and after diagnosis in patients with inflammatory arthritis, by sex of the patients

Laboratory testsRheumatoid arthritis (RA)Ankylosing spondylitis (AS)Psoriatic arthritis (PsA)
Male, N (%)Female, N (%)Male, N (%)Female, N (%)Male, N (%)Female, N (%)
Before diagnosis
 Rheumatoid factor
  Year 3916 (7.2)3169 (11.1)260 (6.5)586 (14.1)211 (7.1)405 (11.6)
  Year 21383 (10.9)4160 (14.6)352 (8.8)782 (18.8)271 (9.1)498 (14.3)
  Year 18484 (66.8)19 667 (68.8)1610 (40.4)1986 (47.7)1364 (46.0)1719 (49.4)
 ESR or CRP
  Year 32224 (17.5)6306 (22.1)744 (18.6)1202 (28.9)602 (20.3)958 (27.5)
  Year 22848 (22.4)7576 (26.5)886 (22.2)1433 (34.4)671 (22.6)1106 (31.8)
  Year 19888 (77.8)22 520 (78.8)2501 (62.7)2843 (68.3)1889 (63.8)2372 (68.1)
After diagnosis
 ESR or CRP—year 19853 (78.9)22 269 (78.6)2360 (59.4)2693 (64.9)2146 (72.6)2559 (73.6)
 CBC or LFT or RFT—year 111 202 (89.7)25 420 (89.7)3002 (75.5)3415 (82.3)2585 (87.4)3095 (89.0)
 Lipid profile—year 15708 (45.7)11 926 (42.1)1392 (35.0)1690 (40.7)1314 (44.4)1558 (44.8)
 Lipid profile—year 26052 (49.4)12 988 (46.4)1533 (38.8)1876 (45.3)1368 (46.5)1644 (47.5)
 Lipid profile—year 35946 (49.7)12 741 (46.1)1577 (40.3)1866 (45.3)1389 (47.6)1617 (47.0)
  • Denominators for RA cohort:

  • Year 1 after index date: male patients—12 488, female patients—28 339.

  • Year 2 after index date: male patients—12 250, female patients—28 014.

  • Year 3 after index date: male patients—11 971, female patients—27 628.

  • Denominators for AS cohort:

  • Year 1 after index date: male patients—3975, female patients—4149.

  • Year 2 after index date: male patients—3948, female patients—4141.

  • Year 3 after index date: male patients—3913, female patients—4118.

  • Denominators for PsA cohort:

  • Year 1 after index date: male patients—2957, female patients—3478.

  • Year 2 after index date: male patients—2940, female patients—3462.

  • Year 3 after index date: male patients—2919, female patients—3440.

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

  • CBC, complete blood count; CRP, C reactive protein; ESR, erythrocyte sedimentation rate; LFT, liver function test; RFT, renal function test.