Sugar-sweetened beverage intake and risk of oral cavity cancer: Results from 3 prospective US cohort studies.

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10570 Background: Approximately 65% of adults in the US consume sugar-sweetened beverages (SSBs) daily, and consumption of SSBs substantially increased across successive birth cohorts in the US until 2000. Previous authors have identified an association between early-onset digestive tract cancers and SSBs. Recently, early-onset (<50 years) oral cavity squamous cell carcinoma has been observed in non-smoking, non-drinking individuals. The objective of this study was to investigate the association between SSBs and development of oral cavity cancer (OCC) in smokers, non-smokers, and those <50 years of age. Methods: We prospectively examined the association between SSB intake and OCC risk among 165,212 women in Nurses’ Health Study (NHS, 1986-2014) and Nurses’ Health Study II (NHSII, 1991-2015), and 45,790 men in the Health Professionals Follow-Up Study (HPFS, 1986-2014). All participants completed validated food frequency questionnaires (FFQs) every 4 years. Cox proportional hazards models adjusted for age, caloric intake, tobacco pack-years, alcohol intake, and BMI were used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for the association between SSB intake and OCC incidence. Results: We identified 129 incident OCC cases in NHS/NHSII over 36 years of follow-up and 99 cases in HPFS over 30 years of follow-up for HPFS. The mean age at study baseline was 44.4 years for NHS/NHSII and 54.1 years for HPFS. Notably, in the multivariable adjusted model, increasing SSB intake was associated with a higher risk of OCC only among female participants in NHS/NHSII. Specifically, those in the highest quartile of SSB intake had a 229% increased risk of OCC compared to the lowest quartile (95% CI 1.29-4.07, ptrend=0.04). In non- or light-drinkers (<5g/day) in NHS/NHSII, SSBs was associated with OCC (HR=2.58, 95% 1.16-5.70, ptrend=0.10, N=81 cases). However, in non- or light-smokers (<5 pack-years), SSB intake was not associated with risk of OCC, though power was limited due to low case numbers (HR=1.56, 95% 0.66-3.68, ptrend=0.45, N=64). In contrast, no association of SSB intake with OCC risk was observed in the male HPFS cohort, overall (N=99) or among non-smokers (N=44). Early-onset OCC (<50 years) was limited to 9 patients, and thus a subset analysis could not be performed. Conclusions: Higher SSB intake was associated with a higher risk of developing OCC in women, but not men, after controlling for known risk factors. Reduction of SSB consumption may serve as a potential strategy to address the increase in OCC observed in recent years.