Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 353

The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.

Herpes Zoster and Tofacitinib Therapy in Patients With Rheumatoid Arthritis

Open access
Winthrop, Kevin L., Yamanaka, Hisashi, Valdez, Hernan, Mortensen, Eric, Chew, Robert, Krishnaswami, Sriram, Kawabata, Thomas, Riese, Richard·2014·Arthritis & Rheumatology

Abstract

Objective: Patients with rheumatoid arthritis (RA) are at increased risk for herpes zoster (HZ) (i.e., shingles). The aim of this study was to determine whether treatment with tofacitinib increases the risk of HZ in patients with RA. Methods: HZ cases were identified as those reported by trial investigators from the databases of the phase II, phase III, and long‐term extension (LTE) clinical trials in the Tofacitinib RA Development Program. Crude incidence rates (IRs) of HZ per 100 patient‐years (with 95% confidence intervals [95% CIs]) were calculated by exposure group. Logistic regression analyses were performed to evaluate potential risk factors for HZ (e.g., age, prednisone use). Results: Among 4,789 participants, 239 were identified as having tofacitinib‐associated HZ during the phase II, phase III, and LTE trials, of whom 208 (87%) were female and whose median age was 57 years (range 21–75 years). One HZ case (0.4%) was multidermatomal; none of the cases involved visceral dissemination or death. Twenty‐four patients with HZ (10%) permanently discontinued treatment with tofacitinib, and 16 (7%) were either hospitalized or received intravenous antiviral drugs. The crude HZ IR across the development program was 4.4 per 100 patient‐years (95% CI 3.8–4.9), but the IR was substantially higher within Asia (7.7 per 100 patient‐years, 95% CI 6.4–9.3). Older age was associated with HZ (odds ratio 1.9, 95% CI 1.5–2.6), and IRs for HZ were similar between patients receiving 5 mg tofacitinib twice daily (4.4 per 100 patient‐years, 95% CI 3.2–6.0) and those receiving 10 mg twice daily (4.2 per 100 patient‐years, 95% CI 3.1–5.8). In the phase III trials among placebo recipients, the incidence of HZ was 1.5 per 100 patient‐years (95% CI 0.5–4.6). Conclusion: In the Tofacitinib RA Development Program, increased rates of HZ were observed in patients treated with tofacitinib compared with those receiving placebo, particularly among patients within Asia. Complicated HZ among tofacitinib‐treated patients was rare.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1002/art.38745

Cites

38 of 38 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 38 references

Cited by

See all 353

Metadata

Authors
Winthrop, K. L., Yamanaka, H., Valdez, H., Mortensen, E., Chew, R., Krishnaswami, S., Kawabata, T., & Riese, R.
Venue
Arthritis & Rheumatology
Publisher
Wiley
Published
2014-09-26
Volume
66
Issue
10
Pages
2675-2684
ISSN
  • 2326-5191 (ISSN-L)
  • 2326-5205
OpenAlex
W2163184895
Cited by
353
References
38
FWCI
24.89
Type
journal article
Language
en
Open access
hybrid

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Herpes Zoster and Tofacitinib Therapy in Patients With Rheumatoid Arthritis. https://app.cochat.ai/papers/10.1002/art.38745
The paper
Winthrop, K. L., Yamanaka, H., Valdez, H., Mortensen, E., Chew, R., Krishnaswami, S., Kawabata, T., & Riese, R. (2014). Herpes Zoster and Tofacitinib Therapy in Patients With Rheumatoid Arthritis. Arthritis & Rheumatology. https://doi.org/10.1002/art.38745

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.