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Associations of Lower-Carbohydrate and Lower-Fat Diets with Mortality among People with Cardiovascular Disease.
Journal of Nutrition 2024 March 14
BACKGROUND: Although low-carbohydrate and low-fat diets have been shown to have short-term metabolic benefits, the associations of these dietary patterns, particularly different food sources and macronutrient quality, with mortality in people with cardiovascular disease (CVD) remain unclear.
OBJECTIVES: To examine the associations of different types of lower-carbohydrate diets (LCDs) and lower-fat diets (LFDs) with mortality among individuals with CVD.
METHODS: This study included 3971 adults with CVD from the NHANES 1999-2014. Mortality status was linked to National Death Index mortality data through December 31, 2019. Overall, unhealthy and healthy LCD and LFD scores were determined based on the percentages of energy from total and subtypes of carbohydrate, fat, and protein. Cox proportional hazards regression models were applied to calculate HRs and 95% CIs.
RESULTS: Higher healthy LCD score was associated with favorable blood lipids and higher homeostasis model assessment of insulin resistance (HOMA-IR), whereas higher unhealthy LFD score was associated with lower high-density lipoprotein and higher C-reactive protein (CRP) at baseline (all P-trend < 0.05). During 35150 person-years of follow-up, 2163 deaths occurred. For per 20-percentile increment in dietary scores, the multivariate-adjusted HRs (95% CIs) of all-cause mortality were 0.91 (0.86, 0.96) for healthy LCD score (P < 0.001), 0.94 (0.89, 1.00) for healthy LFD score (P =0.04) and 1.07 (1.00, 1.14) for unhealthy LFD score (P = 0.04).
CONCLUSIONS: Overall LCD and LFD scores were not associated with total mortality. Unhealthy LFD scores were associated with higher total mortality, whereas healthy LCD and LFD scores were associated with lower mortality among people with CVD.
OBJECTIVES: To examine the associations of different types of lower-carbohydrate diets (LCDs) and lower-fat diets (LFDs) with mortality among individuals with CVD.
METHODS: This study included 3971 adults with CVD from the NHANES 1999-2014. Mortality status was linked to National Death Index mortality data through December 31, 2019. Overall, unhealthy and healthy LCD and LFD scores were determined based on the percentages of energy from total and subtypes of carbohydrate, fat, and protein. Cox proportional hazards regression models were applied to calculate HRs and 95% CIs.
RESULTS: Higher healthy LCD score was associated with favorable blood lipids and higher homeostasis model assessment of insulin resistance (HOMA-IR), whereas higher unhealthy LFD score was associated with lower high-density lipoprotein and higher C-reactive protein (CRP) at baseline (all P-trend < 0.05). During 35150 person-years of follow-up, 2163 deaths occurred. For per 20-percentile increment in dietary scores, the multivariate-adjusted HRs (95% CIs) of all-cause mortality were 0.91 (0.86, 0.96) for healthy LCD score (P < 0.001), 0.94 (0.89, 1.00) for healthy LFD score (P =0.04) and 1.07 (1.00, 1.14) for unhealthy LFD score (P = 0.04).
CONCLUSIONS: Overall LCD and LFD scores were not associated with total mortality. Unhealthy LFD scores were associated with higher total mortality, whereas healthy LCD and LFD scores were associated with lower mortality among people with CVD.
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