High quality diet lowers prevalence of depressive symptoms in women
Higher quality diets appear to decrease the prevalence of depressive symptoms in a cohort of middle-aged Japanese females, a new cross-sectional study has shown.
In the study sample of 3,963 young (age 18 years) and 3,833 middle-aged (mean age 47.9±4.2 years) Japanese females, the corresponding prevalence of depressive symptoms were 22.0 and 16.8 percent.
In the young cohort, those in the highest quintile of diet quality scores had lower risks of depressive symptoms compared with those in the lowest quintile (odds ratio [OR], 0.65; 95 percent CI, 0.50 to 0.84) after controlling for confounders. Diet quality scores and the prevalence of depressive symptoms also showed a significant inverse association with each other (p=0.0005 for trend).
Similarly, middle-aged Japanese women with the highest diet quality scores had lower chances of showing depressive symptoms compared with those who have poor diet quality scores (OR, 0.59; 0.45 to 0.78). The association between depressive symptoms and diet quality scores was also inverse and significant (p<0.0001).
Participant data were retrieved from the Study of Women on Diets and Health. Participants who answered questionnaires more than a month after the study and who were not able to reliably report the usual dietary and lifestyle habits were excluded.
Diet quality scores were calculated based on the Japanese Food Guide Spinning Top recommended ranges for seven diet components: sodium from seasoning; grain dishes; vegetable dishes; fish and meat dishes; milk; fruits; and snacks, confection and beverages.