Fig. 4: Direction of hypothesis in included studies, segregated by study design.
From: Systematic evidence and gap map of research linking food security and nutrition to mental health
The top panel is the number of studies with food security and nutrition (FSN) as the hypothesized exposure and mental health as the studied outcome. The middle panel is the number of studies with mental health as the exposure and FSN as the outcome, and the bottom panel is the number of studies where both hypotheses were investigated.
