- Cross-sectional analysis of YaHS-TAMYZ cohort examined interactions between DASH and modified Mediterranean diets and psychological disorders on sleep quality and duration.
- Significant interaction: highest adherence to modified Mediterranean diet with severe depression linked to lower odds of poor sleep quality (interaction P=0.039).
- Conclusion: modified Mediterranean diet may improve sleep quality in severe depression; prospective studies required to confirm causal relationship.
Int J Prev Med. 2026 Jul 30;17:54. doi: 10.4103/ijpvm.ijpvm_130_24. eCollection 2026.
ABSTRACT
BACKGROUND: The separate relationship between dietary food intake and psychiatric illnesses on individuals’ sleep has been discovered in previous investigations. However, it is yet unknown how these variables combine to affect the quantity and quality of sleep. Therefore, the purpose of the present cross-sectional study was to assess the possible interaction between Dietary Approaches to Stop Hypertension (DASH) and modified Mediterranean (mMED) dietary patterns (DPs) and psychological ailments (PAs) on sleep quality and duration among Iranian adults, Yazd, Iran.
MATERIALS AND METHODS: Baseline data from a large Iranian cohort study (Yazd Health Study (YaHS)-Taghzieh Mardom-e-Yazd (TAMYZ)) were used in the current investigation. A validated food frequency questionnaire was utilized to obtain participants’ dietary consumption. The adherence level of the study DPs was calculated according to the earlier scientific literature. The depression, anxiety, and stress scale-21 questionnaire was employed to assess PAs. Additionally, gathering information regarding the individuals’ sleep quality and duration was done via a validated nocturnal sleep questionnaire and a short version of the Pittsburgh questionnaire. Finally, the multivariable adjusted binary logistic regression test was used to examine the interaction between DPs and PAs on sleep quality and duration.
RESULTS: Participants with the greatest adherence to the mMED DP and with severe depression had significantly lower odds of “low sleep quality” than those without depression signs and with the lowest adherence to the diet (P for interaction: 0.039).
CONCLUSION: A mMED DP might help those with severe depression by improving sleep quality. Prospective investigations are needed to confirm this finding.
PMID:42622034 | PMC:PMC13489561 | DOI:10.4103/ijpvm.ijpvm_130_24
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