Fig. 3
HRs and 95% CIs for all-cause mortality in 1376 CRC survivors comparing the fourth to the first quartile of total physical activity, stratified by potential effect modifiers; for each stratum the total number of individuals/number of deaths is shown; HRs and 95% CIs were estimated with Cox proportional hazards models, adjusted for sex, age at physical activity assessment, BMI, survival time from CRC diagnosis until physical activity assessment, tumor location, occurrence of metastases, occurrence of other cancer, chemotherapy, smoking status, alcohol intake, (time x age), (time x BMI) and (time x metastases), except the stratifying variable; pinteraction was calculated by entering into the model an interaction term of total physical activity as a continuous variable and the stratifying covariate; cutpoint for age at physical activity assessment and gHrQol was the respective median value. Abbreviations: BMI, body mass index; CRC, colorectal cancer; gHrQol, global health-related quality of life