Western Diet and Inflammatory Mechanisms in African American Adults With Heart Failure.
Erica Davis, Sandra B Dunbar, Melinda K Higgins and 4 others
PMID 39666467WHAT IT FOUND
In 31 Black adults with heart failure, an inflammatory diet score did not track inflammation or blood TMAO.
Pork consumption was associated with higher TMAO, and higher BMI was associated with higher TNF-alpha. No treatment effect was tested.
Key findings
01The dietary inflammation score was not related to TNF-alpha, and TMAO was not related to the dietary inflammation score or choline-related nutrients.
02Pork consumption was reported as significantly different from non-consumption for TMAO (p = .007, d = -1.4), with pork consumers at mean 9.08 ng/ml and non-consumers at mean 6.18 ng/ml.
03TNF-alpha was lower among participants with BMI under 30 kg/m2 (mean 1.31 pg/ml) than among participants with BMI over 30 kg/m2 (mean 1.82 pg/ml), a difference reported as significant (p = .020).
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
Only 31 participants were studied, so these results are preliminary and not stable enough to guide care. The design was cross-sectional, so it cannot show that diet, pork, BMI, TMAO, or TNF-alpha caused anything. The study did not correct for multiple comparisons, so some reported associations may be false positives. The paper did not report a primary outcome or test a treatment, and it did not measure heart failure symptoms, hospitalization, or death. Data were collected remotely during the pandemic using self-collected dried blood spots and self-report diet, which may add measurement error. The sample was limited to self-identified Black, African American, and Afro-Caribbean adults with chronic heart failure stages II to IV in one Southeast academic center, so results may not apply to other groups.
Declared interests
The authors declared no conflicts of interest. The supplied publication types list NIH extramural and non-U.S. government research support.
The easy way to misread this
Do not tell patients that eating pork raises heart failure inflammation or that reducing pork will improve outcomes. This was a 31-person cross-sectional pilot that measured blood markers, not symptoms, hospitalizations, or death, and it did not test a diet change.