GI

Question 1

BMI

Answer 1

Higher BMI is not consistently associated with survival after GI cancer; relationships differ by cancer type, time of BMI measurement, and cancer outcome.

Question 2

Physical Activity

Answer 2

Greater physical activity is associated with improved overall and CRC-specific survival, and lower sedentary time also is associated with lower CRC-specific mortality; evidence for other GI cancers is limited and inconclusive.

Question 3

Western diet

Answer 3

A Western dietary pattern is related to worse survival after CRC; evidence is limited for other GI cancers.

Question 4

Alcohol

Answer 4

Prediagnosis alcohol consumption of <30 g per day is associated with lower overall and CRC-specific mortality; there is no association between postdiagnosis alcohol consumption and survival outcomes. Available evidence supports limiting or avoiding alcohol after laryngeal, head and neck, or hepatic cancer because alcohol may increase all-cause mortality among survivors of these cancers.