Dietary modification in the treatment of schizophrenia spectrum disorders: A systematic review

Table 2 Characteristics of studies that reported benefit in mental health outcomes and those that did not

	Number of studies reporting benefit (%)	Number of studies not reporting benefit (%)	P value
Studies with greater than 200 participants	4 of 19 (21)	5 of 6 (83)	0.00559
Studies that included patients with non-SSD diagnoses (e.g., Depression, Bipolar, substance use disorder)	8 of 19 (42)	4 of 6 (67)	0.29380
Studies with an individual intervention component	2 of 19 (11)	3 of 6 (50)	0.03509
Studies designed with primary outcome related to mental health	9 of 19 (47)	2 of 6 (33)	0.54599
Studies that used a control	10 of 19 (53)	5 of 6 (83)	0.18081
Studies that used randomization	3 of 19 (16)	4 of 6 (67)	0.01553
Studies with positive finding in an outcome related to body weight	7 of 10 (70)	1 of 4 (25)	0.12428