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Published on: October 12, 2012
The associations between bullous pemphigoid and drug use: a UK case-control study
Antonia Lloyd-Lavery1, Ching-Chi Chi, Fenella Wojnarowska
1Department of Dermatology, Oxford University Hospitals, Oxford, England. alloydlavery@gmail.com
Objective:
To explore associations between bullous pemphigoid (BP) and previous drug use in the United Kingdom.
Design:
A case-control study comparing the drug history of consecutive patients with BP and control subjects.
Setting:
Tertiary care center for immunobullous diseases and skin tumor clinics at Oxford University Hospitals.
Patients Or Other Participants:
Eighty-six consecutive BP patients and 134 consecutive controls from the same region and similar in age and sex who presented with other dermatological diagnoses.
Main Outcome Measures:
Crude and adjusted odds ratios and 95% confidence interval of BP in relation to each drug.
Results:
Loop diuretics were used significantly more frequently by the BP patients (crude odds ratio, 2.4 [95% CI, 1.2-5.0; P= .02]; adjusted odds ratio, 3.8 [1.5-9.7; P= .006]). No significant differences were found between groups for use of other diuretics, aspirin, antidepressants, antiepileptics, antihypertensives, or central nervous system agents (eg, antipsychotics). Patients with BP used calcium or vitamin D supplements, antibiotics, antihistamines, and prednisolone significantly more often on multivariate analysis.
Conclusions:
The findings of our study demonstrate increased use of loop diuretics in patients with BP before the development of BP. The mechanism behind such an association clearly warrants further investigation.
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