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. 2017 May 18;10:1189–1199. doi: 10.2147/JPR.S125421

Table 4.

Pearson product moment coefficients

FSS Pearson product moment correlation (r)
PSQI total score FSS existing PHQ-15
Chronic pelvic pain 0.036 −0.012 0.022
Tension-type headache 0.014 0.502** 0.076**
Globus 0.043 0.251** 0.074**
Irritable bowel syndrome 0.099** 0.623** 0.222**
Functional dyspepsia 0.036 0.525** 0.118**
Chronic low back pain 0.045 0.236** 0.114**
FSS existing 0.097** 1 0.242**

Note:

**

p<0.001, r>0.10 = weak, r>0.30 = moderate, r>0.50 = strong. Bold font indicates p<0.01.

Abbreviations: FSS, functional somatic syndrome; PSQI, Pittsburgh Sleep Quality Index; PHQ, Patient Health Questionnaire – German Version.