Temporal Clustering of Pityriasis Rosea Cases
Title: Temporal case clustering in pityriasis
rosea: regression analysis on 1379 patients in Minnesota, Kuwait,
and Diyarbakir, Turkey
Authors: Chuh AA, et al.
Publication: Arch Dermatol. 2005 Jun;141(6):767-71.
The authors conducted a statistical analysis of the dates in
which 1379 patients which were diagnosed with pityriasis rosea
(and psoriasis) in 3 different locations: Kuwait, Minnesota, and
The authors found that there was 3 significant clustering of
dates of patients coming in for pityriasis rosea treatment –
there was also 1 negative cluster (where less patients come to
seek treatment). In contrast, they found no clustering of dates
of patients seeking treatment for psoriasis.