Table 7.

Psychiatric disorders, concordant versus discordant plant-based index comparisons.

Outcome	N	hPDI versus PDI statistical significance with outcome			hPDI versus uPDI statistical significance with outcome			Studies (references)
		Favors hPDI*	Both same†	Favors PDI‡	Favors hPDI*	Both same†	Favors uPDI‡
Anxiety	3	1	2	0	3	0	0	(32, 73, 105)
Cognitive impairment	4	2	3	0	0	1	3	(61, 63, 103, 107)
Depression	3	1	2	0	3	0	0	(32, 73, 105)
Stress	4	3	1	0	4	0	0	(18, 32, 73, 105)
Impulsivity	1	1	0	0	1	0	0	(39)

PDI, plant-based dietary index; hPDI, healthful PDI; uPDI, unhealthful PDI. ^*Favors hPDI if hPDI hazard ratio statistical significance for the outcome is more favorable than the comparator (PDI or uPDI): e.g., hPDI significantly favorable and comparator non-significant or unfavorable, or hPDI non-significant and comparator unfavorable. ^†Both same if hPDI hazard ratio has same relationship to outcome as comparator (both significantly favorable, both non-significant, or both significantly unfavorable). ^‡Favors comparator (PDI or uPDI) if hazard ratio statistical significance for the outcome is more favorable than the hPDI: e.g., comparator significantly favorable and hPDI non-significant or unfavorable, or comparator non-significant and hPDI unfavorable.