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 4 Exploratory factor analysis for the developed PHQ-8

Items	Factor 1	Factor 2	Factor 3
Feeling tired or having low energy	0.802
Fatigue	0.769
Insomnia or trouble sleeping	0.525
Dizziness	0.482
Back pain		0.797
Pain in arms, legs, or joints		0.719
Throat discomfort			0.728
Dry mouth			0.706

ISSN: 1471-230X