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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Stud+Alcohol+Drugs
2016 ; 77
(2
): 185-98
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Do "Moderate" Drinkers Have Reduced Mortality Risk? A Systematic Review and
Meta-Analysis of Alcohol Consumption and All-Cause Mortality
#MMPMID26997174
Stockwell T
; Zhao J
; Panwar S
; Roemer A
; Naimi T
; Chikritzhs T
J Stud Alcohol Drugs
2016[Mar]; 77
(2
): 185-98
PMID26997174
show ga
OBJECTIVE: Previous meta-analyses of cohort studies indicate a J-shaped
relationship between alcohol consumption and allcause mortality, with reduced
risk for low-volume drinkers. However, low-volume drinkers may appear healthy
only because the "abstainers" with whom they are compared are biased toward ill
health. The purpose of this study was to determine whether misclassifying former
and occasional drinkers as abstainers and other potentially confounding study
characteristics underlie observed positive health outcomes for lowvolume drinkers
in prospective studies of all-cause mortality. METHOD: A systematic review and
meta-regression analysis of studies investigating alcohol use and mortality risk
after controlling for quality-related study characteristics was conducted in a
population of 3,998,626 individuals, among whom 367,103 deaths were recorded.
RESULTS: Without adjustment, meta-analysis of all 87 included studies replicated
the classic J-shaped curve, with low-volume drinkers (1.3-24.9 g ethanol per day)
having reduced mortality risk (RR = 0.86, 95% CI [0.83, 0.90]). Occasional
drinkers (<1.3 g per day) had similar mortality risk (RR = 0.84, 95% CI [0.79,
0.89]), and former drinkers had elevated risk (RR = 1.22, 95% CI [1.14, 1.31]).
After adjustment for abstainer biases and quality-related study characteristics,
no significant reduction in mortality risk was observed for low-volume drinkers
(RR = 0.97, 95% CI [0.88, 1.07]). Analyses of higher-quality bias-free studies
also failed to find reduced mortality risk for low-volume alcohol drinkers. Risk
estimates for occasional drinkers were similar to those for low- and
medium-volume drinkers. CONCLUSIONS: Estimates of mortality risk from alcohol are
significantly altered by study design and characteristics. Meta-analyses
adjusting for these factors find that low-volume alcohol consumption has no net
mortality benefit compared with lifetime abstention or occasional drinking. These
findings have implications for public policy, the formulation of low-risk
drinking guidelines, and future research on alcohol and health.