Table 1.
Characteristics of study patients by indication (n = 1339)
| Characteristic | RA (n = 292) % (n) | AS (n = 216) % (n) | CD (n = 316) % (n) | PsA (n = 260) % (n) | Psoriasis (n = 136) % (n) | UC (n = 119) % (n) | Total (n = 1339) % (n) | P‐value |
|---|---|---|---|---|---|---|---|---|
| Age (mean, SD) | 53.0 (14.4) | 36.1 (15.4) | 41.7 (14.2) | 47.6 (12.7) | 33.7 (12.8) | 44.1 (11.5) | 43.3 (15.1) | <0.001 |
| Female sex | 81.2% (237) | 34.3% (74) | 50.9% (161) | 53.8% (140) | 38.2% (52) | 55.5% (66) | 54.5% (730) | <0.001 |
| SES score (1–20 scale; mean, SD) | 12.5 (4.0) | 12.4 (4.1) | 12.9 (4.1) | 12.4 (4.2) | 12.4 (4.4) | 13.4 (3.7) | 12.5 (4.0) | 0.198 |
| Missing SES score | 12.3% (36) | 13.4% (29) | 17.4% (55) | 15.8% (41) | 13.2% (18) | 16.8% (20) | 14.9% (199) | 0.513 |
| District | ||||||||
| Centre | 63.4% (185) | 65.7% (142) | 67.1% (212) | 66.2% (172) | 72.1% (98) | 73.9% (88) | 67.0% (897) | 0.030 |
| North | 25.0% (73) | 20.8% (45) | 14.6% (46) | 19.2% (50) | 14.7% (20) | 15.1% (18) | 18.8% (252) | |
| South | 11.6% (34) | 13.4% (29) | 18.4% (58) | 14.6% (38) | 13.2% (18) | 10.9% (13) | 14.2% (190) | |
| Ever smoked | 20.5% (60) | 23.6% (51) | 19.0% (60) | 16.2% (42) | 23.5% (32) | 18.5% (22) | 19.9% (267) | |
| BMI (kg m −2 ) | ||||||||
| <25 | 18.2% (53) | 14.4% (31) | 44.9% (142) | 14.2% (37) | 14.7% (20) | 36.1% (43) | 24.3% (326) | <0.001 |
| 26–30 | 30.5% (89) | 32.9% (71) | 19.0% (60) | 32.3% (84) | 30.1% (41) | 21.8% (26) | 27.7% (371) | |
| >30 | 29.8% (87) | 28.7% (62) | 6.6% (21) | 36.5% (95) | 27.2% (37) | 16.8% (20) | 24.0% (322) | |
| Unknown | 21.6% (63) | 24.1% (52) | 29.4% (93) | 16.9% (44) | 27.9% (38) | 25.2% (30) | 23.9% (320) | |
| Clinical history | ||||||||
| Cardiovascular disease | 13.7% (40) | 7.9% (17) | 3.5% (11) | 7.7% (20) | 8.1% (11) | 5.9% (7) | 7.9% (106) | <0.001 |
| Diabetes | 11.3% (33) | 6.5% (14) | 2.5% (8) | 16.5% (43) | 9.6% (13) | 7.6% (9) | 9.0% (120) | <0.001 |
| HTN | 31.5% (92) | 17.1% (37) | 7.9% (25) | 30.0% (78) | 18.4% (25) | 9.2% (11) | 20.0% (268) | <0.001 |
| CKD | 12.7% (37) | 6.0% (13) | 3.2% (10) | 6.5% (17) | 5.1% (7) | 5.0% (6) | 6.7% (90) | <0.001 |
| History of cancer | 6.5% (19) | 0.5% (1) | 5.4% (17) | 4.6% (12) | 2.2% (3) | 5.9% (7) | 4.4% (59) | 0.016 |
| Utilization of healthcare services in baseline year, median (IQR) | ||||||||
| Primary care visits | 22.5 (15–36) | 17 (11–27) | 20 (13–31) | 18 (12–29) | 13.5 (7.5–23) | 28 (16–37) | 20 (12–31) | <0.001 |
| Secondary care visits | 9 (5–14) | 9 (5–13) | 6 (2–10) | 8 (4–14) | 9 (4–13) | 6 (2–13) | 8 (4–13) | <0.001 |
| ≥1 Hospitalization | 21.9% (64) | 17.1% (37) | 49.1% (155) | 16.5% (43) | 22.8% (31) | 48.7% (58) | 29.0% (388) | <0.001 |
| Number of inpatient days among hospitalized patients (n = 388) | 4.5 (2–10.5) | 4 (2–9) | 5 (2–10) | 4 (1–9) | 7 (4–16) | 7 (4–12) | 5 (2–11) | 0.015 |
Crohn's disease (CD), ulcerative colitis (UC), rheumatoid arthritis (RA), psoriatic arthritis (pSA), ankylosing spondylitis (AS)