Table 3.

Question examples

Questionnaire	Question example	Scale
K10	During the last month, how often did you feel tired out for no good reason?	0—not at all…4—always
PQ-16	I have seen things that other people apparently cannot see	True—untrue
Discrimination scale	How often do you experience one of the following types of discrimination: You are being scoffed at or threatened?	0—never…3—often
Social defeat scale	I feel that I have not made it in life	0—not at all…4—always
Oslo social support questionnaire	How many people are so close to you that you can count on them if you have serious personal problems?	0—none…4—six or more