Fig. 4

Shapes of the association of PHQ-9 score and dietary health with all-cause mortality among US cancer survivors, fully adjusted, NHANES 2005–2018. The results were adjusted for age, sex, race, BMI, education level, marital status, family income poverty ratio, health insurance coverage, smoking status, alcohol use, sleep duration, energy intake, hypertension, hypercholesterolemia, diabetes, CVD, the number of cancer types and years since first cancer diagnosis. Abbreviations: PHQ-9 score, Patient Health Questionnaire-9 score; NHANES, the National Health and Nutrition Examination Survey; HR, hazard ratio; CI, confidence interval; BMI, body mass index; CVD, cardiovascular disease; HEI-2020, Healthy Eating Index-2020; AHEI, Alternative Healthy Eating Index; aMED, Alternate Mediterranean Diet Score; MEDI, MED Index in serving sizes from the PREDIMED trial; DASH, Dietary Approaches to Stop Hypertension Index; DASHI, DASH Index in serving sizes from the DASH trial; DII, Dietary Inflammation Index; EtOH, alcohol