Developing the Patient Health Questionnaire-8 for a greater impact on the quality of life of patients with functional dyspepsia compared to Somatic Symptom Scale-8

Table 5 Exploratory factor analysis for the SSS-8

Items	Factor 1	Factor 2	Factor 3
Back pain	0.713
Pain in arms, legs, or joints	0.695
Headaches	0.495
Chest pain or shortness of breath	0.494
Insomnia or trouble sleeping		0.806
Feeling tired or having low energy		0.767
Stomach or bowel problems			0.881
Dizziness			0.353

ISSN: 1471-230X