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Table 2 Factor analysis for the symptoms: Rotated Component Matrix for 3 factors.

From: Identifying dyspepsia in the Greek population: translation and validation of a questionnaire

  Component
SYMPTOMS 1 2 3
(Item 1) Pain or discomfort    0.870
(Item 4) Feeling of excess wind or fullness in the upper abdomen 0.566   
(Item 7) Heartburn 0.777   
(Item 10) Heartburn when lying in bed 0.882   
(Item 13) Heartburn only when lying in bed 0.483   
(Item 14) Awakened by the heartburn 0.861   
(Item 15) Acid taste at the back of the throat 0.555   
(Item 18) Nausea   0.816  
(Item 21) Vomiting   0.876  
(Item 24) Difficulty in swallowing 0.651   
Eigenvalues 3.60 1.40 1.13
Degree of explanation (%) 36.00 14.03 11.32