Table 7.

The effect of diet intake on depression

Authors	Years	Country	Diet	Study	Results	P
Sánchez-Villegas et al.40	2009	Spain	M	C	Greater adherence to the Mediterranean diet is associated with a reduced risk of self-reported depression (traditional)	<0.001
Okubu et al.41	2011	Japan	J	C	No significant association	0.59
Mamplekou et al.20	2010	Mediterranean Islands	M	O	No significant association	NS
Akbaraly et al.39	2009	England	T	C	Increased consumption of processed foods is associated with an increased likelihood of depressive symptoms	0.001
Chatzi et al.35	2011	Greece	O	C	No significant association	0.70
Nanri et al.36	2010	Japan	J	O	Greater adherence to the Japanese diet is associated with a reduced risk of depressive symptoms	<0.001
Jacka et al.37	2011	Norway	N	O	Greater adherence to the Norwegian diet is associated with a reduced risk of depressive symptoms in men	0.02
Parker et al.42	2010	South Korea	L	CT	Greater adherence to a healthy diet is associated with a lower mean	<0.01
Aihara et al.38	2011	Japan	E	CT	Greater adherence to eating balanced meals is associated with a reduced likelihood of depressive symptoms	<0.05

Diet category: E, balanced diet; J, Japanese; L, low calorie; M, Mediterranean; N, Norwegian; O, Western diet; T, processed foods. Study category: C, cohort; CT, case–control; O, observational.

NS, not significant.