Effect of two consecutive earthquakes on outbreaks of alopecia areata.

The pathogenesis of alopecia areata (AA) is still unknown. We investigated whether two consecutive earthquakes in Duzce, Turkey within a 3-month interval could precipitate AA. Patients who developed AA after the first earthquake in Duzce were included in this study. The admittance rate and demographic characteristics of AA patients admitted in the same period of the previous year (BE=before earthquake group) were compared to that of AA patients admitted after the earthquake (AE=after earthquake group). The admittance rate and onset of AA after the first earthquake were investigated retrospectively. In addition, possible relationships between the earthquake and age at the first attack, severity of the disease, and ophiasis were studied. The ratio of AA patients in the BE group was 12/1,121 (0.9%), while this value was 26/1,430 (1.8%) in the AE group (p=0.07). There were no significant differences with regard to sex, age of the first attack, severity of the disease, or ophiasis between the two groups. AA appeared between 18-28 weeks after the first earthquake in 14 (53.8%) of the patients. The earthquake did not increase the admittance rate of AA significantly. This finding suggests that a stressful event such a natural disaster is not a unique factor in AA outbreaks.