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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)

Domain

Eigen value

Items

Factor 1

Factor 2

Factor 3

Factor 4

Factor 5

Sleep problems

10.804

walking 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 activities

1.998

physical 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

Looks

1.645

sport

,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 & Swelling

1.308

lips 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

Limits

1.076

limits in choosing food

,198

,219

,229

,198

,784

eating

,234

,301

,135

,306

,712

choice of clothes

,192

,422

,286

,060

,464