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Table 8 Factor analysis matrix of QOLRAD items in five factors.

From: Validation of a survey methodology for gastroesophageal reflux disease in China

Item

Factors

 

1

2

3

4

5

Q4001

0.797

    

Q4002

0.526

  

0.784

 

Q4003

0.677

   

0.576

Q4004

0.874

    

Q4005

0.808

    

Q4006

0.852

    

Q4007

0.879

    

Q4008

0.829

    

Q4009

0.826

    

Q4010

0.903

    

Q4011

0.867

    

Q4012

0.912

    

Q4013

0.890

    

Q4014

0.812

    

Q4015

0.931

    

Q4016

0.736

    

Q4017

0.879

    

Q4018

0.954

    

Q4019

0.940

    

Q4020

0.516

0.794

   

Q4021

0.796

 

0.557

  

Q4022

0.825

    

Q4023

0.938

    

Q4024

0.954

    

Q4025

0.930

    
  1. QOLRAD: Quality of Life in Reflux and Dyspepsia.