scholarly journals Dietary Inflammatory Index and its Association with the Risk of Cardiovascular Diseases, Metabolic Syndrome, and Mortality: A Systematic Review and Meta-Analysis

2018 ◽  
Vol 50 (05) ◽  
pp. 345-358 ◽  
Author(s):  
Nazli Namazi ◽  
Bagher Larijani ◽  
Leila Azadbakht

AbstractFindings from previous studies on the association between the Dietary Inflammatory Index (DII) and the risk of chronic diseases and mortality have been inconsistent. We aimed to summarize studies on the association of the DII and the risk for cardiovascular disease (CVD), metabolic syndrome (MetS), and mortality in a systematic review and meta-analysis. We performed a systematic search in PubMed/Medline, Web of Knowledge, and Scopus databases for relevant studies written in English and published until 31 December 2017. Studies that reported the relative risk (RR), odd ratio (OR) or hazard ratio (HR) for the most pro-inflammatory versus the most anti-inflammatory diets were included. Finally, 17 studies [CVD (n=6), MetS (n=5), mortality (n=6)] were included for systematic review and meta-analysis. Findings indicated a trend toward a positive relationship between the DII and the risk for CVD (pooled RR: 1.35; 95% CI: 1.13, 1.60; I2: 28.6%, p=0.21), all-cause mortality (pooled HR: 1.21; 95% CI: 1.09, 1.35; I2: 72.6%, p=0.003), CVD mortality (pooled HR: 1.30, 95% CI: 1.07, 1.57; I2: 74.0%, p=0.009) and cancer mortality (pooled HR: 1.28; 95% CI: 1.07, 1.53; I2: 62.5%, p=0.03). However, no significant association was found between the DII and the risk for MetS (pooled RR: 1.01; 95% CI: 0.82, 1.24; I2: 32.6%, p=0.20). Although in the current meta-analysis the most pro-inflammatory diet versus the most anti-inflammatory diet was not associated with the risk of MetS, we observed a substantial association between the DII and the risk for CVD and all types of mortality. However, further cohort studies in different populations are needed to clarify this association.

2021 ◽  
pp. 1-8
Author(s):  
Qian Yi ◽  
Xue Li ◽  
Yazhou He ◽  
Wei Xia ◽  
Jing Shao ◽  
...  

Abstract Objective: Inflammation has been suggested to play an important role in the development and progression of metabolic syndrome (MetS). Dietary inflammatory index (DII), a measurement of inflammatory potential in diets, was suggested to be associated with MetS. The aim of this systematic review and meta-analysis was to establish the associations of DII with MetS and its components based on available observational studies. Design: Systematic review and meta-analysis. Setting: A comprehensive literature search of studies that assessed the associations between DII and MetS was conducted in PubMed, Medline and Embase, using a combination of search terms relating to DII and MetS. Participants: Eighteen articles were eligible, of which fourteen were cross-sectional and four were cohort in design. Results: Results from the random effects meta-analysis showed significantly positive associations of higher DII (top v. bottom quartiles) with MetS (OR: 1·23 (95 % CI 1·10, 1·37)), abdominal obesity (OR: 1·15 (95 % CI 1·02, 1·29)), high blood pressure (OR: 1·17 (95 % CI 1·07, 1·29)), hyperglycaemia (OR: 1·18 (95 % CI 1·05, 1·33)) and hypertriacylglycerolaemia (OR: 1·17 (95 % CI 1·07, 1·28)). The effects of summary OR became stronger when analyses were restricted to cohorts, studies that adjudged for covariates (including BMI, physical activity and total energy intake). Conclusions: Higher DII, representing pro-inflammatory diet, is associated with higher odds of MetS and its components, except for low HDL-cholesterol. The findings prompt dietary interventions for preventing MetS from the aspect of inflammation.


2018 ◽  
Vol 24 (7) ◽  
pp. 965-986 ◽  
Author(s):  
Camille Lassale ◽  
G. David Batty ◽  
Amaria Baghdadli ◽  
Felice Jacka ◽  
Almudena Sánchez-Villegas ◽  
...  

AbstractWith depression being the psychiatric disorder incurring the largest societal costs in developed countries, there is a need to gather evidence on the role of nutrition in depression, to help develop recommendations and guide future psychiatric health care. The aim of this systematic review was to synthesize the link between diet quality, measured using a range of predefined indices, and depressive outcomes. Medline, Embase and PsychInfo were searched up to 31st May 2018 for studies that examined adherence to a healthy diet in relation to depressive symptoms or clinical depression. Where possible, estimates were pooled using random effect meta-analysis with stratification by observational study design and dietary score. A total of 20 longitudinal and 21 cross-sectional studies were included. These studies utilized an array of dietary measures, including: different measures of adherence to the Mediterranean diet, the Healthy Eating Index (HEI) and Alternative HEI (AHEI), the Dietary Approaches to Stop Hypertension, and the Dietary Inflammatory Index. The most compelling evidence was found for the Mediterranean diet and incident depression, with a combined relative risk estimate of highest vs. lowest adherence category from four longitudinal studies of 0.67 (95% CI 0.55–0.82). A lower Dietary Inflammatory Index was also associated with lower depression incidence in four longitudinal studies (relative risk 0.76; 95% CI: 0.63–0.92). There were fewer longitudinal studies using other indices, but they and cross-sectional evidence also suggest an inverse association between healthy diet and depression (e.g., relative risk 0.65; 95% CI 0.50–0.84 for HEI/AHEI). To conclude, adhering to a healthy diet, in particular a traditional Mediterranean diet, or avoiding a pro-inflammatory diet appears to confer some protection against depression in observational studies. This provides a reasonable evidence base to assess the role of dietary interventions to prevent depression. This systematic review was registered in the PROSPERO International Prospective Register of Systematic Reviews under the number CRD42017080579.


Circulation ◽  
2018 ◽  
Vol 137 (suppl_1) ◽  
Author(s):  
Jun Li ◽  
Marta Guasch-Ferré ◽  
Yanping Li ◽  
Frank Hu

Background: Previous studies on intake of linoleic acid (LA), a predominant n-6 fatty acid, and risk of mortality from all-cause and cardiovascular disease (CVD) have generated inconsistent results. We performed a systematic review and meta-analysis of prospective cohort studies to summarize the evidence regarding the relation of LA and all-cause and CVD mortality. Methods: We searched MEDLINE and EMBASE databases through June 2017 for prospective cohort studies reporting association of LA (assessed by dietary survey or biomarker in blood or adipose tissue) with all-cause and CVD mortality. In addition, unpublished data from pooling projects were included. We pooled the multivariate-adjusted Hazards ratios (HRs) using random-effect meta-analysis, which allowed for between-study heterogeneity. Results: 27 studies covering 37 prospective cohorts were identified; these included 274,565 individuals with dietary assessment (34,597 all-cause and 10,636 CVD deaths) and 54,794 individuals with biomarker measurements (6,767 all-cause and 5,311 CVD deaths). Comparing the highest category with the lowest, dietary LA intake was associated with a 14% lower risk of all-cause mortality (95% confidence interval [CI], 2%-25%, I 2 =71%) and a 20% lower risk of CVD mortality (95% CI, 13%-26%, I 2 =0). Baseline health status (i.e. general population, CVD/high risk for CVD, or cancer) might be a main source of heterogeneity for the association of dietary LA intake with all-cause mortality. As for biomarkers, 1 SD increment in LA was associated with a 9% lower risk of all-cause mortality (95% CI, 4%-14%, I 2 =61%) and a 10% lower risk of CVD mortality (95% CI, 5%-14%, I 2 =13%). Heterogeneity was presented across tissue types and between genders. Conclusions: In prospective cohort studies, LA intake, assessed by either dietary survey or biomarkers, was inversely associated with all-cause and CVD mortality in a dose-response manner. These data support the current recommendations on polyunsaturated fat intake for prevention of CVD and early death.


2018 ◽  
Vol 22 (2) ◽  
pp. 295-306 ◽  
Author(s):  
Alireza Milajerdi ◽  
Kurosh Djafarian ◽  
Sakineh Shab-Bidar

AbstractObjectiveHigh Na intake has been associated with different health problems. However, serious controversies exist over studies investigating associations of Na intake with mortality from all-causes and CVD. The present systematic review and meta-analysis was done to investigate, for the first time, the dose–response association of dietary Na intake with all-cause and CVD mortality among prospective studies.DesignRelevant papers published up to August 2017 were searched in MEDLINE, EMBASE and Google Scholar databases. Prospective cohort studies on the association of dietary Na intake with all-cause or/and CVD mortality were included. Linear and non-linear dose–response associations between Na intake and CVD and all-cause mortality were examined.ResultsOverall, twenty publications met inclusion criteria. A significant non-linear association (P<0·001) was found between Na intake and CVD mortality risk among studies assessing urinary Na excretion, with a relatively steep slope at Na intakes above 2400mg/d. However, the association was not significant in studies using dietary Na intake (P=0·61). Additionally, the non-linear association of Na intake with all-cause mortality was also non-significant. No linear association (effect size; 95 % CI; I2) was seen between 100mg/d increment in Na intake and CVD mortality (1·01; 0·97, 1·05; 98·4 %) or all-cause mortality (1·01; 1·00, 1·02; 89·2 %). Following subgroup analyses, the association between Na intake and CVD mortality was observed only among studies conducted in the USA (0·99; 0·99, 1·00; 20·0 %).ConclusionsThe study showed a direct association between urinary Na excretion and CVD mortality which was more considerable at intakes above 2400mg/d. In contrast, no significant association was found between Na intake and all-cause mortality. Further long-term prospective studies on different populations are required to confirm these findings.


2020 ◽  
pp. 016402752094817
Author(s):  
Sajjad Moradi ◽  
Amir Hadi ◽  
Hamed Mohammadi ◽  
Omid Asbaghi ◽  
Mehdi Zobeiri ◽  
...  

A systematic review and meta-analysis was conducted to comprehensively examine the association between Dietary Inflammatory Index (DII®) score and risk of frailty. Frailty risk were available from five studies comprising 13,908 older adults. Furthermore, frailty related parameters were extacted from two studies with 7,539 individuals. A pooled adjusted odds ratio analysis indicated that there was an association between DII® score and frailty risk (OR = 1.24, 95%CI: 1.6–1.33, P < 0.001, I2 = 0.0%). The results of frailty related parameters demonstrated that DII® score was associated with weakness risk (OR = 1.12, 95%CI: 1.05–1.19, P = 0.014, I2 = 0.0%), but not other frailty-related parameters including exhaustion, low BMI or low physical activity. The results of this meta-analysis suggest that older adults who exhibit higher DII® scores have an increased frailty risk. Further prospective cohort studies with longer follow-up periods, are needed to support this possible association between DII® score and frailty risk.


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