Introduction
We conducted a retrospective cohort study comparing the safety of Janus kinase (JAK) inhibitors vs. tumor necrosis factor-a (TNF) antagonists in patients with inflammatory bowel diseases (IBD).
Aims & Methods
Using an administrative claims databasein the U.S, Optum Labs®, we identified patients with IBD who were new users of either JAK inhibitors or TNF antagonists between 2016-2023 and had insurance coverage for at least 1y before and after treatment initiation. We compared the risk of infections (overall, and serious infections requiring hospitalization), venous thromboembolism (VTE) and major adverse cardiovascular events (MACE) between patients treated with JAK inhibitors vs. TNF antagonists through stabilized inverse probability of treatment weighted (IPW) Cox proportional hazards model accounting for baseline disease characteristics, healthcare utilization, comorbidities, and medication exposure.
Results
We included 856 patients treated with JAK inhibitors (age, 47±17y; 82% with ulcerative colitis [UC]; 23% on upadacitinib) and 9422 patients treated with TNF antagonists (age, 45±18y, 44% with UC). JAK inhibitors were associated with higher risk of overall infections (incidence rate [IR], 62.4 per 100-py vs. 37.4 per 100-py; HR, 1.67 [95% CI, 1.44-1.93]), but not serious infections (IR, 4.9 vs. 5.4 per 100-py; HR, 1.02 [0.72-1.44]) compared with TNF antagonists. There was no difference in the risk of VTE (IR, 1.3 vs. 1.2 per 100-py; HR, 0.67 [0.35-1.29]). JAK inhibitors (vs. TNF antagonists) were associated with lower risk of MACE (IR, 0.4 vs. 0.7 per 100-py; HR, 0.37 [0.15-0.96]). Findings were largely stable on subgroup analyses based on type of IBD, type of JAK inhibitors, age and baseline risk of adverse events.
Table 1. Incidence rates and hazard ratios with JAK inhibitors and TNF antagonists in patients with Inflammatory bowel disease
| Incidence rate per 100 person-years | Overall | JAK inhibitors | TNF antagonists |
| Overall Infections | 38.95 [37.80; 40.09] | 62.39 [56.49;68.29] | 37.43 [36.27; 38.59] |
| Serious infections | 5.34 [4.98; 5.69] | 4.85 [3.55; 6.14] | 5.37 [5.00; 5.74] |
| Venous thromboembolism | 1.23 [1.06; 1.39] | 1.32 [0.65; 1.99] | 1.22 [1.05; 1.39] |
| Major adverse cardiovascular events | 0.68 [0.55; 0.82] | 0.44 [0.05; 0.82] | 0.69 [0.56; 0.83] |
| Hazard ratios for JAK inhibitors vs. TNF antagonists | IBD | Crohn’s disease | Ulcerative colitis |
| Overall Infections | 1.67 [1.44-1.93] | 1.91 [1.47-2.48] | 1.45 [1.29-1.64] |
| Serious infections | 1.02 [0.72-1.44] | 1.46 [0.83-2.59] | 0.72 [0.50-1.03] |
| Venous thromboembolism | 0.67 [0.35-1.29] | 0.50 [0.09-2.67] | 0.72 [0.20-1.30] |
| Major adverse cardiovascular events | 0.37 [0.15-0.96] | -- | 1.54 [0.61-3.91] |
Conclusion
Compared to TNF antagonists, JAK inhibitors were associated with a higher risk of overall infection, no signifcant difference for serioys infection and a lower risk of MACE.
References
1. The Lancet Gastroenterology H. New restrictions on JAK inhibitors in the EU. Lancet Gastroenterol Hepatol 2023;8:1.
2. Ananthakrishnan AN, Murad MH, Scott FI, et al. Comparative Efficacy of Advanced Therapies for Management of Moderate-to-Severe Ulcerative Colitis: 2024 American Gastroenterological Association Evidence Synthesis.
3. Ytterberg SR, Bhatt DL, Mikuls TR, et al. Cardiovascular and Cancer Risk with Tofacitinib in Rheumatoid Arthritis. N Engl J Med 2022;386:316-326.
4. Panes J, D'Haens GR, Sands BE, et al. Analysis of tofacitinib safety in ulcerative colitis from the completed global clinical developmental program up to 9.2 years of drug exposure. United European Gastroenterol J 2024;12:793-801.
Disclosure
DA: No relevant disclosures
KHY: No relevant disclosures
SBP: No relevant disclosures
SWG: No relevant disclosures
CM: Consulting fees from AbbVie, Alimentiv, Amgen, AVIR Pharma Inc, Bristol
Myers Squibb, Celltrion, Eli Lilly, Ferring, Forte Biosciences, Fresenius Kabi,
Gilead, Janssen, McKesson, Mirador Therapeutics, Mylan, Pendopharm, Pfizer,
Prometheus Biosciences Inc., Roche, Sanofi, Takeda, Tillotts Pharma; speaker's
fees from AbbVie, Amgen, AVIR Pharma Inc, Alimentiv, Bristol Myers Squibb, Eli
Lilly, Ferring, Fresenius Kabi, Janssen, Merck, Organon, Pendopharm, Pfizer,
Sanofi, Takeda, Tillotts Pharma; royalties from Springer Publishing; research
support from AbbVie, Eli Lilly, Ferring, Pfizer.
ANA: No relevant disclosures
NS: No relevant disclosures
VJ: Consulting/advisory board fees from AbbVie, Alimentiv Inc, Arena
pharmaceuticals, Asahi Kasei Pharma, Asieris, Astra Zeneca, Bristol Myers
Squibb, Celltrion, Eli Lilly, Ferring, Flagship Pioneering, Fresenius Kabi,
Galapagos, GlaxoSmithKline, Genentech, Gilead, Janssen, Merck, Mylan,
Pandion, Pendopharm, Pfizer, Protagonist, Prometheus, Reistone Biopharma,
Roche, Sandoz, Second Genome,Takeda, Teva, Topivert, Ventyx, Vividion;
speaker’s fees from, Abbvie, Ferring, Galapagos, Janssen Pfizer Shire, Takeda,
Fresenius Kabi
RX: No relevant disclosures
SS: Research grants from Pfizer