Patient demographics
During 2002-2018, 380 children with a diagnosis of CSU recorded in their
medical records were evaluated. After reviewing the medical files, 250
patients (65.8%) had CSU according to the defined criteria and were
included in the study. The remaining 130 were excluded either because
they did not fulfill the criteria for CSU (113 children) or due to lack
of follow-up data (17 children). Of the 250 patients included, 136 were
females (54.4%). The mean age at diagnosis was 11.4 ± 5.1 years, median
12 years (range 0.9-18.0). Among the study group, 122 (48%) were
adolescents (13-18 years old). There was no significant difference in
the prevalence of CSU by sex; except for the adolescents, where females
comprised 60% of the group (p=0.07) (Table 1).