From: 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
Variable
FD
(n = 471)
PDS
(n = 146)
EPS
(n = 97)
Overlap
(n = 228)
PHQ-8
r
0.309
0.281
0.190
0.360
P
< 0.001
0.001
0.063
SSS-8
R
0.236
0.197
0.317
0.004
0.053