Intestinal Research

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Original Articles

IBD

Latent tuberculosis infection screening in patients with inflammatory bowel disease: a nationwide retrospective cohort study in South Korea comparing IGRA alone versus a combination of TST and IGRA: Ye-Jee Kim, Jiyeon Kim, Jiwon Lee, Tae Sun Shim, Sang Hyoung Park, Kyung-Wook Jo; Intest Res 2025;23(4):541-550. Published online October 14, 2025; DOI: https://doi.org/10.5217/ir.2025.00136

Abstract PDF Supplementary Material PubReader ePub

Background/Aims
We aimed to evaluate if using the interferon-gamma release assay (IGRA) alone is effective for latent tuberculosis infection (LTBI) screening in preventing active tuberculosis in patients with inflammatory bowel disease (IBD) before initiating anti-tumor necrosis factor alpha (anti-TNF-α) therapy, compared to using both the tuberculin skin test and IGRA.
Methods
Using South Korea’s Health Insurance Review and Assessment Service, we selected IBD patients treated with anti-TNF-α agents for ≥ 1 year who underwent LTBI screening between 2018 and 2021. We compared the 1-year incidence rate and standardized incidence ratio of active tuberculosis incidence after starting anti-TNF-α treatment to the general population based on the LTBI screening strategy.
Results
Of the 4,215 enrolled patients, 3,505 underwent IGRA alone for LTBI screening, while 710 received both tuberculin skin test and IGRA. Within 1 year of starting anti-TNF-α treatment, 15 patients (0.36%) developed active tuberculosis, with a mean follow-up period of 4,200.6 person-years. The 1-year tuberculosis incidence rates were 372.3 (95% confidence interval [CI], 198.2–636.6) per 100,000 person-years for the IGRA alone group and 282.3 (95% CI, 34.2–1,019.9) per 100,000 person-years for the combination group. The standardized incidence ratios were similar: 14.34 (95% CI, 7.63–24.52) for the IGRA alone group and 11.25 (95% CI, 1.26–40.61) for the combination group.
Conclusions
Using IGRA alone may be an effective strategy for LTBI screening in IBD patients before starting anti-TNF-α therapy. (Intest Res, Published online)

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Risk Factors of Latent Tuberculosis Infection among Incarcerated Populations: A Case–Control Study in Shenzhen, China
Zhenyang Liu, Yawei Cui, Jiarong Xu, Zhikai Ding, Ao Huang
Journal of Epidemiology and Global Health.2026;[Epub] CrossRef

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87 Download
1 Crossref

IBD

Risk of malignancies and chemopreventive effect of statin, metformin, and aspirin in Korean patients with ulcerative colitis: a nationwide population-based study: Eun Hye Oh, Ye-Jee Kim, Minju Kim, Seung Ha Park, Tae Oh Kim, Sang Hyoung Park; Intest Res 2025;23(2):129-143. Published online November 9, 2023; DOI: https://doi.org/10.5217/ir.2023.00062

Abstract PDF Supplementary Material PubReader ePub

Background/Aims
We investigated the incidences of overall and site-specific malignancies and chemopreventive effects of statin, metformin, and aspirin in patients with ulcerative colitis.
Methods
We collected data using the Health Insurance Review and Assessment claims database from January 2007 to April 2020.
Results
The overall malignancy risk among the 35,189 ulcerative colitis patients was similar to that of the general population (standardized incidence ratio, 0.94; 95% confidence interval, 0.88–1.00). In male patients, standardized incidence ratios were high for thyroid cancer and low for stomach cancer, colorectal cancer, liver cancer, and lung cancer. Concurrently, standard incidence ratios were high for liver cancer and central nervous system cancer in female patients. While 122 cases of colorectal cancer occurred in the study patients, the standardized incidence ratio was 0.83 (95% confidence interval, 0.69–0.99). Treatment for ulcerative colitis was not associated with an increased adjusted hazard ratio, while comorbidities increased it for all malignancies. Treatment for ulcerative colitis was associated with an increased adjusted hazard ratio, while comorbidities did not increase it for colorectal cancer. After adjusting for age, sex, comorbidities, and ulcerative colitis treatment, statins showed a dose-dependent chemopreventive effect for all malignancies (P=0.002), while metformin and aspirin did not show any.
Conclusions
In ulcerative colitis patients, standardized incidence ratios for all malignancies and colorectal cancer did not increase. Adjusted hazard ratios for all malignancies increased with comorbidities and those for colorectal cancer with ulcerative colitis treatment. Statins have a dose-dependent chemopreventive effect for all malignancies.

Citations

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Prevalence of viral hepatitis A and C in patients with inflammatory bowel disease: a nationwide population-based study in South Korea
Jin Hwa Park, Sang Hyoung Park, Sang Pyo Lee, Kang Nyeong Lee, Hang Lak Lee, Oh Young Lee, Soorack Ryu, Junwon Go
The Korean Journal of Internal Medicine.2026; 41(1): 95. CrossRef
Back to the Future: Repurposing Metformin, a Metabolically Active Drug, to Treat Mild-to-Moderate Ulcerative Colitis
Elisabetta Antonelli, Alessandra Dell’Era, Giovanni Maconi, Gabrio Bassotti
Metabolites.2026; 16(4): 238. CrossRef
Relationship between statin use and inflammatory bowel disease: Exploring possible implications
Antonietta G Gravina, Raffaele Pellegrino, Michele Izzo, Ilaria De Costanzo, Giuseppe Imperio, Assunta Tambaro, Alessia Lamart, Fabio Landa, Alessandro Federico
World Journal of Gastroenterology.2026;[Epub] CrossRef
Thyroid disorders and inflammatory bowel disease: an association present in adults but also in children and adolescents
Valeria Calcaterra, Francesca Penagini, Virginia Rossi, Luisa Abbattista, Alice Bianchi, Massimiliano Turzi, Lucia Cococcioni, Gianvincenzo Zuccotti
Frontiers in Endocrinology.2025;[Epub] CrossRef
Does statin have a chemopreventive effect in patients with ulcerative colitis?
Yoon Suk Jung
Intestinal Research.2025; 23(2): 113. CrossRef

9,419 View
514 Download
8 Web of Science
5 Crossref

IBD

Risks of colorectal cancer and biliary cancer according to accompanied primary sclerosing cholangitis in Korean patients with ulcerative colitis: a nationwide population-based study: Eun Hye Oh, Ye-Jee Kim, Minju Kim, Seung Ha Park, Tae Oh Kim, Sang Hyoung Park; Intest Res 2023;21(2):252-265. Published online December 2, 2022; DOI: https://doi.org/10.5217/ir.2022.00092

Abstract PDF Supplementary Material PubReader ePub

Background/Aims
We conducted a nationwide population-based study to investigate incidence rates of colorectal and biliary cancers according to accompanying primary sclerosing cholangitis in Korean ulcerative colitis patients.
Methods
We used the Health Insurance Review and Assessment claim database from January 2007 to April 2020. Standardized incidence ratios of colorectal and biliary cancers in ulcerative colitis patients were calculated.
Results
Among 35,189 newly diagnosed ulcerative colitis patients, 1,224 patients were diagnosed with primary sclerosing cholangitis. During the study period, 122 and 52 patients were diagnosed with colorectal and biliary cancers, respectively. Incidences of colorectal cancer were not higher in ulcerative colitis patients than those in the general population (standardized incidence ratios, 0.83; 95% confidence interval, 0.69–0.99), regardless of accompanied primary sclerosing cholangitis (standardized incidence ratio, 0.73; 95% confidence interval, 0.24–1.71). While incidences of biliary cancer were not higher in ulcerative colitis patients than those in the general population (standardized incidence ratio, 1.14; 95% confidence interval, 0.80–1.58), these were much higher with accompanied primary sclerosing cholangitis (standardized incidence ratio, 10.07; 95% confidence interval, 5.75–16.36). Cumulative incidences of colorectal and biliary cancers increased in patients who were diagnosed with ulcerative colitis at an older age.
Conclusions
In Korean ulcerative colitis patients, colorectal cancer incidences were not higher than those in the general population regardless of accompanied primary sclerosing cholangitis. However, biliary cancer incidences were much higher in ulcerative colitis patients with primary sclerosing cholangitis than in those without, or in the general population.

Citations

Citations to this article as recorded by

Association between statin use and the risk of colorectal cancer in patients with inflammatory bowel disease: a systematic review and meta-analysis
Meng Ding, Yang Liu, Ying Zhang, Yunfeng Qiu
Frontiers in Immunology.2026;[Epub] CrossRef
Prevalence of viral hepatitis A and C in patients with inflammatory bowel disease: a nationwide population-based study in South Korea
Jin Hwa Park, Sang Hyoung Park, Sang Pyo Lee, Kang Nyeong Lee, Hang Lak Lee, Oh Young Lee, Soorack Ryu, Junwon Go
The Korean Journal of Internal Medicine.2026; 41(1): 95. CrossRef
Colitis-associated colorectal neoplasia in ulcerative colitis with primary sclerosing cholangitis: a nationwide study
Koichi Komatsu, Takahide Shinagawa, Motoi Uchino, Hiroki Ikeuchi, Koji Okabayashi, Shiro Oka, Kitaro Futami, Michio Itabashi, Kazuhiro Watanabe, Masatsune Shibutani, Yoshiki Okita, Toshifumi Wakai, Yusuke Mizuuchi, Kinya Okamoto, Kazutaka Yamada, Yu Sato,
Intestinal Research.2026;[Epub] CrossRef
Prevalence and risk factors of gallstone disease in Korean patients with ulcerative colitis
Kwangwoo Nam, Jae Yong Lee, Sang Hyoung Park, Ha Won Hwang, Ho-Su Lee, Kyunghwan Oh, Hee Seung Hong, Kyuwon Kim, Jin Hwa Park, Seung Wook Hong, Sung Wook Hwang, Dong-Hoon Yang, Byong Duk Ye, Jeong-Sik Byeon, Seung-Jae Myung, Suk-Kyun Yang
Intestinal Research.2025; 23(4): 455. CrossRef
Metformin for primary prevention of colorectal neoplasms in adenoma-free populations: a systematic review and dose-response meta-analysis
Mengdan Shen, Shan Lu, Zihao Xu, Feifei Zhou, Li-Ting Sheng, Qiang Yu
Frontiers in Pharmacology.2025;[Epub] CrossRef
Treatment of primary sclerosing cholangitis combined with inflammatory bowel disease
You Sun Kim, Edward H. Hurley, Yoojeong Park, Sungjin Ko
Intestinal Research.2023; 21(4): 420. CrossRef
Are the risks of colorectal cancer and biliary cancer really increased if patients with ulcerative colitis have primary sclerosing cholangitis?
Jung Wook Lee, Won Moon
Intestinal Research.2023; 21(2): 171. CrossRef

9,331 View
350 Download
5 Web of Science
7 Crossref

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