Int J Epidem. 2017 Dec 1;46(6):1836-1846

A pooled analysis of dietary sugar/carbohydrate intake and esophageal and gastric cardia adenocarcinoma incidence and survival in the United States (US).

Li N, Petrick JL, Steck SE, Bradshaw PT, McClain KM, Niehoff NM, Engel LS, Shaheen NJ, Risch HA, Vaughan TL, Wu A, Gammon MD

Abstract

Background:  During the past 40 years, esophageal/gastric cardia adenocarcinoma (EA/GCA) incidence increased in Westernized countries, but survival remained low. A parallel increase in sugar intake, which may facilitate carcinogenesis by promoting hyperglycaemia, led us to examine sugar/carbohydrate intake in association with EA/GCA incidence and survival.

Methods:  We pooled 500 EA cases, 529 GCA cases and 2027 controls from two US population-based case-control studies with cases followed for vital status. Dietary intake, assessed by study-specific food frequency questionnaires, was harmonized and pooled to estimate 12 measures of sugar/carbohydrate intake. Multivariable-adjusted odds ratios (ORs) and hazard ratios [95% confidence intervals (CIs)] were calculated using multinomial logistic regression and Cox proportional hazards regression, respectively.

Results:  A incidence was increased by 51-58% in association with sucrose (ORQ5vs.Q1 = 1.51, 95% CI = 1.01-2.27), sweetened desserts/beverages (ORQ5vs.Q1 = 1.55, 95% CI = 1.06-2.27) and the dietary glycaemic index (ORQ5vs.Q1 = 1.58, 95% CI = 1.13-2.21). Body mass index (BMI) and gastro-esophageal reflux disease (GERD) modified these associations (Pmultiplicative-interaction ? 0.05). For associations with sucrose and sweetened desserts/beverages, respectively, the OR was elevated for BMI < 25 (ORQ4-5vs.Q1-3 = 1.79, 95% CI = 1.26-2.56 and ORQ4-5vs.Q1-3 = 1.45, 95% CI = 1.03-2.06), but not BMI ? 25 (ORQ4-5vs.Q1-3 = 1.05, 95% CI = 0.76-1.44 and ORQ4-5vs.Q1-3 = 0.85, 95% CI = 0.62-1.16). The EA-glycaemic index association was elevated for BMI ? 25 (ORQ4-5vs.Q1-3 = 1.38, 95% CI = 1.03-1.85), but not BMI < 25 (ORQ4-5vs.Q1-3 = 0.88, 95% CI = 0.62-1.24). The sucrose-EA association OR for GERD < weekly was 1.58 (95% CI = 1.16-2.14), but for GERD ? weekly was 1.01 (95% CI = 0.70-1.47). Sugar/carbohydrate measures were not associated with GCA incidence or EA/GCA survival.

Conclusions:  If confirmed, limiting intake of sucrose (e.g. table sugar), sweetened desserts/beverages, and foods that contribute to a high glycaemic index, may be plausible EA risk reduction strategies.