Table 13. Summary of the contrasts (DvsHC – diagnosed vs healthy controls; SvsHC – sub-clinical vs healthy controls; allReg – linear regression between FAA and depression questionnaire score for all subjects together; DReg – linear regression only for the diagnosed subjects) and confounds (age, gender, and education) used in each study.

	STUDY
	I	II	III	IV	V
	Contrast type
DvsHC	+		+	+	+
SvsHC		+	+	+
allReg	+		+	+	+
DReg	+		+	+	+
	Control for confounds
gender	+	+	+	+	+
age	+	+	+	+	+
education		+	+		+