The association between bullous pemphigoid and comorbidities: a case-control study in Moroccan patients

Comorbidities of bullous pemphigoid (BP) have not been thoroughly described in Morocco. This study investigates clinical features, comorbidities, and medications in a cohort of Moroccan patients with confirmed BP to help decrease morbidity and mortality.

This cross-sectional study involved 81 cases of BP diagnosed in 2015-2018 and 162 age- and sex-matched controls with complete follow-up at the Department of Dermatology in a university hospital setting.

Eighty-one individuals were included in the study; the mean age at diagnosis was 71.3 years, and 53% were men. The most common comorbidities were hypertension (58%), type 2 diabetes (43%), and dyslipidemia (31%). Almost a quarter of the cohort (28%) had been diagnosed with at least one neurological disease before the onset of BP. BP was significantly associated with the presence of malignancies (14%; p = 0.017) and stroke (16%; p = 0.009) compared to an age-matched control group. The most common standard medications were beta-blockers, diuretics, and statins. In total, 86% of the patients with type 2 diabetes were taking antidiabetic drugs, especially metformin (82%) and gliptins (51%).

This study showed that BP is associated with stroke and the presence of malignancy compared to the age-matched general population. This study also calls for investigation into the specific role of some drugs as inducing factors for BP.