Posts tagged “meta-analysis”
The health benefits of coffee [joe, java, brown sludge, nectar of the gods, liquid happiness] have been widely unproven in the peer-reviewed scientific testing. Studies have flip-flopped on the impact of coffee consumption on various health endpoints more than Mitt on… everything.
A recent systematic review and dose-response meta-analysis in Circulation, a journal of the American Heart Association (AHA), found that moderate coffee consumption — of around 2 US cups per day (between 295 - 590 mL) — was health protective and decreased the risk of heart failure by 11%. This flies in the face of the current statement on coffee by AHA, based on a single study, which states that coffee may increase the risk of heart failure. The previous study failed to control for potential characteristics of the evaluated population that may also contribute to heart failure.
The systematic review looked across the medical literature beginning in 1966 and found 5 valid studies that followed a cohort of people over time. These studies, when combined, included 6522 heart failure events among 140,220 participants. Four of the studies were conducted in Sweden; one was conducted in Finland. The relationship between coffee consumption and heart failure did not vary by sex, history of myocardial infarction, or diabetes.
There are some shortcomings to the study, of course. The 5 studies included in the analysis relied on self-reported coffee consumption. The type of coffee consumed — that is, the strength of the coffee, whether it was caffeinated or blasphemous decaffeinated, and the brewing method — were not noted in the original studies.
All that said, the review convincingly argues that moderate coffee intake is healthful and heart-protective.
I’m off to sound my barbaric yawp over the roofs of the world with mug o’joe in hand.
* in moderation