Abstract
Background
There is evidence suggesting an association between bullous pemphigoid (BP) and a range of neurological diseases. Whether neurological cancer is a risk factor for BP remains unknown.
Objective
The aim of the study was to investigate the risk of subsequent BP among patients with neurological cancer.
Methods
This nationwide population-based cohort study was based on data obtained from the Taiwan National Health Insurance Research Database between 2000 and 2012. A total of 8313 patients with neurological cancer and 33,252 age-, sex-, and index-date-matched controls were recruited. The hazard ratio (HR) for subsequent BP in patients with neurological cancer was analyzed using a Cox model and Fine-Gray competing risk model, with mortality as the competing event.
Results
The incidence rates of BP per 100,000 person-years were 37.2 for patients with neurological cancer and 6.8 for controls. The crude incidence rate ratio was 5.49 (95% confidence interval [CI] 2.18–13.30). The mean time to occurrence of BP was 4.48 ± 3.40 years for patients with neurological cancer. Neurological cancer (HR 9.65, 95% CI 3.76–24.77 for the Cox model; HR 2.41, 95% CI 1.14–5.14 for the competing risk model), age per year (HR 1.10, 95% CI 1.05–1.15 for the Cox model; HR 1.06, 95% CI 1.02–1.09 for the competing risk model), and dementia (HR 6.31, 95% CI 2.49–15.99 for the Cox model; HR 7.50, 95% CI 2.84–19.85 for the competing risk model) significantly increased the risk of BP.
Conclusions
Neurological cancer increased the risk for subsequent BP by 2.4-fold, with a relatively short gap of 4.5 years.
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Funding
This study was supported by Grants from the Ministry of Science and Technology, ROC (MOST 108-2314-B-075-041-MY3) and Taipei Veterans General Hospital (V107C-009).
Conflict of interest
Chen-Yi Wu, Hsiao-Yun Hu, Yiing-Jenq Chou, Chung-Pin Li, and Yun-Ting Chang have no conflicts of interest to declare.
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Wu, CY., Hu, HY., Chou, YJ. et al. Neurological Cancer is a Risk Factor for Bullous Pemphigoid: 11-Year Population-Based Cohort Study. Am J Clin Dermatol 21, 591–597 (2020). https://doi.org/10.1007/s40257-019-00494-y
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DOI: https://doi.org/10.1007/s40257-019-00494-y