Table 1. Baseline characteristics by treatment group
|
TNFi (N = 1806)a |
IL-6Ri (N = 485)b |
JAKi (N = 481)c |
p value for crude group comparison |
Age, years, mean (SD) |
57.6 (12.9) |
57.9 (13.1) |
60.3 (12.1) |
< 0.001 |
Duration of RA, years, mean (SD) |
8.6 (8.9) |
12.6 (9.4) |
13.3 (10.0) |
< 0.001d |
Female, n (%) |
1405 (77.8) |
393 (81.0) |
391 (81.3) |
0.12 |
White race, n (%) |
1492 (82.9) |
401 (83.4) |
410 (86.5) |
0.17 |
No insurance, n (%) |
24 (1.3) |
N/A |
5 (1.0) |
0.48d |
Current smoker, n (%) |
332 (18.5) |
75 (15.6) |
88 (18.4) |
|
BMI, mean (SD) |
30.8 (7.6) |
30.5 (7.4) |
30.6 (7.1) |
0.69 |
Seropositivity, n/N (%)e |
|
|
|
|
Anti-CCP antibody positive |
480/1059 (45.3) |
127/275 (46.2) |
143/286 (50.0) |
0.37 |
RF positive |
779/1204 (64.7) |
187/306 (61.1) |
198/307 (64.5) |
0.50 |
Hb, g/dL, mean (SD) |
13.46 (1.41) |
13.58 (1.37) |
13.19 (1.48) |
|
Normal Hb, n (%)f |
1505 (83.3) |
392 (80.8) |
391 (81.3) |
|
Abnormal Hb, n (%)f |
301 (16.7) |
93 (19.2) |
90 (18.7) |
|
CRP, mg/dL, mean (SD) |
0.89 (1.99) |
0.63 (2.59) |
1.01 (2.94) |
|
Normal CRP, n (%)f |
1112 (61.6) |
279 (57.5) |
317 (65.9) |
|
Abnormal CRP, n (%)f |
694 (38.4) |
206 (42.5) |
164 (34.1) |
|
History of comorbidities, n (%) |
|
|
|
|
CVDg |
192 (10.6) |
58 (12.0) |
60 (12.5) |
0.44 |
Malignancyh |
111 (6.1) |
37 (7.6) |
37 (7.7) |
0.31 |
Serious infectionsi |
143 (7.9) |
43 (8.9) |
50 (10.4) |
0.21 |
CDAI, mean (SD) |
17.7 (12.9) |
20.1 (12.9) |
18.3 (12.9) |
< 0.001 |
CDAI category, n (%) |
|
|
|
|
Remission ( < 2.8) |
169 (9.4) |
20 (4.2) |
40 (8.3) |
0.003 |
Low (≥ 2.8 to < 10) |
442 (24.6) |
102 (21.2) |
117 (24.3) |
|
Moderate (≥ 10 to < 22) |
621 (34.5) |
180 (37.4) |
159 (33.1) |
|
High (≥ 22) |
568 (31.6) |
179 (37.2) |
165 (34.3) |
|
HAQ, mean (SD) |
0.9 (0.7) |
1.1 (0.7) |
1.0 (0.7) |
< 0.001 |
No prednisone use, n (%) |
1272 (70.4) |
313 (64.5) |
347 (72.1) |
0.10 |
Concomitant therapy as monotherapy, n (%)j |
346 (19.2) |
159 (32.8) |
177 (36.8) |
< 0.001 |
Biologic line of therapy, n (%) |
|
|
|
|
First |
1388 (76.9) |
295 (60.8) |
313 (65.1) |
< 0.001k |
Second |
223 (12.3) |
57 (11.8) |
46 (9.6) |
|
Third or higher |
195 (10.8) |
133 (27.4) |
122 (25.4) |
|
BMI body mass index, CCP cyclic citrullinated peptide, CDAI Clinical Disease Activity Index, CRP C-reactive protein, CVD cardiovascular disease, HAQ Health Assessment Questionnaire, Hb hemoglobin, IL-6Ri interleukin-6 receptor inhibitor, JAKi Janus kinase inhibitor, N/A not applicable, RA rheumatoid arthritis, RF rheumatoid factor, SD standard deviation, TNFi tumor necrosis factor inhibitor
aCertolizumab pegol, n = 269; etanercept, n = 416; adalimumab, n = 522; infliximab, n = 280; golimumab, n = 319
bTocilizumab, n = 433; sarilumab, n = 52
cBaricitinib, n = 33; upadacitinib, n = 9; tofacitnib, n = 439
dNon-parametric test was used: the Fisher exact test for categorical variables and Kruskal–Wallis test for continuous variables (for all other characteristics in the table, chi-square tests were used for categorical variables and one-way analysis of variance for continuous variables)
eLaboratory monitoring is not mandated in this observational registry
fNormal defined as Hb ≥ 12 g/dL for females and Hb ≥ 13 g/dL for males and CRP < 0.8 mg/dL
gHistory of CVD includes myocardial infarction, stroke, acute coronary syndrome, coronary artery disease, coronary heart failure, revascularization procedure including percutaneous coronary intervention, coronary artery bypass grafting or coronary artery stents, ventricular arrhythmia, cardiac arrest, unstable angina, peripheral arterial disease, other cardiovascular events, pulmonary embolism, carotid artery disease, deep vein thrombosis, and transient ischemic attack
hHistory of malignancy includes lymphoma, lung cancer, breast cancer, non-melanoma skin cancer, and other cancers
iSerious infections include infections that led to hospitalization or intravenous antibiotics: joint/bursa, cellulitis, sinusitis, diverticulitis, sepsis, pneumonia, bronchitis, gastroenteritis, meningitis, urinary tract infection, upper respiratory tract infection, or infection of other specified sites
jConcomitant therapy excludes any disease-modifying anti-rheumatic drug
kIn addition, there was a statistically significant difference (p < 0.001) for the IL-6Ri and JAKi groups combined, compared with the TNFi group