Abstract
Purpose
Results from epidemiologic studies on coffee consumption and the risk of cutaneous melanoma are inconsistent. We conducted a meta-analysis to assess the associations between the consumption of total coffee, caffeinated coffee and decaffeinated coffee and the risk of cutaneous melanoma, respectively.
Methods
A literature search was performed in PubMed, Web of Science and EMBASE for relevant articles published up to August 2015. Pooled relative risks (RRs) with 95 % confidence intervals (CIs) were calculated with a random-effects model. Dose–response relationship was assessed by restricted cubic spline.
Results
Twelve studies involving 832,956 participants for total coffee consumption, 5 studies involving 717,151 participants for caffeinated coffee consumption and 6 studies involving 718,231 participants for decaffeinated coffee consumption were included in this meta-analysis. Compared with the lowest level of consumption, the pooled RRs were 0.80 (95 % CI 0.69–0.93, I 2 = 53.5 %), 0.85 (95 % CI 0.71–1.01, I 2 = 65.0 %) and 0.92 (95 % CI 0.81–1.05, I 2 = 0.0 %) for the consumption of total coffee, caffeinated coffee and decaffeinated coffee, respectively. In subgroup analysis by study design, the pooled RRs in cohort studies and case–control studies were 0.83 (95 % CI 0.72–0.97) and 0.74 (95 % CI 0.51–1.07) for total coffee consumption, respectively. Dose–response analysis suggested cutaneous melanoma risk decreased by 3 % [0.97 (0.93–1.00)] and 4 % [0.96 (0.92–1.01)] for 1 cup/day increment of total coffee and caffeinated coffee consumption, respectively.
Conclusions
This meta-analysis suggests that coffee consumption may reduce the risk of cutaneous melanoma.
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Supplementary Fig. 1
The funnel plot of total coffee consumption and the risk of cutaneous melanoma Each dot represents a different study. (EPS 2813 kb)
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Wang, J., Li, X. & Zhang, D. Coffee consumption and the risk of cutaneous melanoma: a meta-analysis. Eur J Nutr 55, 1317–1329 (2016). https://doi.org/10.1007/s00394-015-1139-z
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DOI: https://doi.org/10.1007/s00394-015-1139-z