. 2021 May 29;96(4):422–428. doi: 10.1016/j.abd.2020.12.009

Table 5.

Studies on seasonal variations of pemphigus.

Reference	Patients	Peak season of the onsets (statistical significance)	Peak season of the relapses (statistical significance)
Current study	68 PF	Spring–Summer (Significant)	Spring–Summer (Not significant in the total group; Significant in the subgroup)
Tsankov et al.¹⁹	57 PV	Spring–Summer (NA)	NA
	15 PF
	2 PH
Salmonpour et al.²⁰	194 PV	Winter (NA)	NA
	20 PF
	9 PH
Robati et al.²¹	222 PV	Summer (Not significant)	Spring (Not significant)

PF, Pemphigus Foliaceus; PV, Pemphigus Vulgaris; PH, Pemphigus Herpetiformis; NA, Not Applicable.