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Table 3 Results from exploratory factor analysis on CU-Q2oL data

From: Psychometric properties of the portuguese version of the chronic urticaria quality of life questionnaire (CU-Q2oL)

DomainEigen valueItemsFactor 1Factor 2Factor 3Factor 4Factor 5
Sleep problems10.804walking up during the night,834,143,068,143,087
daytime tiredness,828,214,101,213,172
ease of falling asleep,807,118,271,063,129
ability to concentrate,620,401,208,141,266
nervousness,608,138,520,092,254
quality of sleep,536,439,141,501,023
bad mood,444,214,441,119,362
Impact on life activities1.998physical activities,195,837,207,091,244
use of cosmetics,154,758,410-,094,224
free time,307,734,056,345,212
social relations,233,682,247,344,182
work,176,578,298,474,071
Looks1.645sport,217,159,807,295,030
medication adverse effects,164,277,779,193,154
embarrassing in public,201,318,707,085,269
bothersome,101,134,576-,031,503
Pruritus & Swelling1.308lips swelling,015,050,014,836,210
eyes swelling,133,001,174,750,323
wheals,232,312,134,732-,048
pruritus,438,316,299,583-,057
Limits1.076limits in choosing food,198,219,229,198,784
eating,234,301,135,306,712
choice of clothes,192,422,286,060,464