Association of the dietary phytochemical index with circadian rhythm and mental health in overweight and obese women: A cross-sectional study
Abstract
BACKGROUND
Previous studies showed that some dietary indexes are the most important reasons to increase the incidence and spread of mental health disorders and circadian rhythm. We aimed to assess the association between the phytochemical index with circadian rhythm and mental health disorders in obese and overweight women.
METHODS
Participants were selected from different health centers by a multistage cluster random sampling method. Dietary intake was assessed by a semi-quantitative food frequency questionnaire (FFQ) with 147 items. Dietary phytochemical index (DPI) was estimated using the following formula: (daily energy derived from phytochemical-rich foods (kcal)/total daily energy intake (kcal)) × 100. Symptoms of mental health disorders were assessed using a validated depression, anxiety, stress scales (DASS) questionnaire with 21-items. The Circadian rhythm was assessed by the morningness-eveningness questionnaire (MEQ).
RESULTS
The mean age and BMI of our participants were 35.19 and 30.48, kg/m2 respectively. After controlling for potential confounders, women in the highest tertile of phytochemical index (PI) had a lower prevalence of depression (P = 0.023) and would be rarely morning type (OR = 1.044, 95% CI 1-1.090) compared with those in the lowest tertile of the PI. In contrast, there was no association between PI and anxiety (OR = 1.001, 95% CI 0.945-1.060) and stress (OR = 0.992, 95% CI 0.940-1.046).
CONCLUSION
We found that high adherence to PI can decrease…
How strong is the evidence?
Evidence Hub reads this as a cross-sectional, done in people. Its evidence level is 4 of 5 (Low · observational). Observational designs can show an association but not prove cause.
Read the paper
Related studies
- Global, regional, and national burden of hepatitis B, 1990–2019: a systematic analysis for the Global Burden of Disease Study 2019
- A meta‐analysis of anal cancer incidence by risk group: Toward a unified anal cancer risk scale
- Global fertility in 204 countries and territories, 1950–2021, with forecasts to 2100: a comprehensive demographic analysis for the Global Burden of Disease Study 2021
- Exercise interventions in Alzheimer's disease: A systematic review and meta-analysis of randomized controlled trials
- Prognostic Significance of Carbonic Anhydrase IX Expression in Cancer Patients: A Meta-Analysis
- Glucocorticoid Resistance: Is It a Requisite for Increased Cytokine Production in Depression? A Systematic Review and Meta-Analysis
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.