Abstract
We aimed to investigate associations of self-rated health with fruit and vegetable consumption (FVC) and physical activity (PA) among older cancer survivors. We used the 2017 Behavioral Risk Factor Surveillance System to identify cancer survivors ≥ 65 years (N = 2663). Self-reported FVC and PA were categorized as ordinal variables to approximate quartiles. Low general health (LGH) was defined as fair or poor self-rated health. A multivariable logistic regression treating LGH as the outcome was used to calculate adjusted odd ratios (aORs) and 95% confidence intervals (CIs) for FVC and PA. Restricted cubic spline depicted non-linear dose-response curves for FVC and PA. In comparative analysis, we used the same logistic regression and dose-response model to calculate ORs of FVC and PA in 73,134 people ≥ 65 years without cancer history. Overall, 470 (17.7%) survivors had LGH. Survivors' mean age was 73.3 years (SD = 5.2), 55.1% of them were female, and 95.4% self-reported as white. In cancer survivors, FVC was not associated with LGH (≥ 28 vs. < 14 times/week: aOR = 1.02, 95% CI = 0.75-1.39, p-trend = 0.50), whereas PA was inversely associated with LGH (≥ 30 vs. < 7 MET-hours/week: aOR = 0.55, 95% CI = 0.41-0.75, p-trend < 0.01). Dose-response curves demonstrated consistent association patterns. In comparative analysis, ORs of PA did not change substantially but we observed inverse association for FVC. An inverse association between PA and LGH was observed among older cancer survivors, but no significant association was obtained for FVC among them. Regular PA may maintain or indicate a favorable health in older cancer survivors, whereas impacts of FVC deserve further investigations.
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