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• W3028862023 abstract "6018 Background: Chronotype is defined as an individual’s propensity to sleep at a specific time in a 24-hour cycle with late chronotype associated with poorer health outcomes including cancer. Chronotype remains relatively undefined in ovarian cancer. The Lifestyle Intervention for oVarian cancer Enhanced Survival (LIVES) study is testing whether 1205 women randomized to a diet and physical activity intervention for 24-months will have longer progression-free survival versus an attention control. Here we determine the association of late and early vs mid chronotypes and patient reported outcomes (PROs), lifestyle behaviors and biomarkers of metabolic health and inflammation in ovarian cancer survivors post-treatment (≤ 6.5 months). Methods: Chronotype was determined using self-reported time to bed (early < 9 pm; mid ≥ 9 pm - ≤12 am; late > 12 am) captured through the Pittsburg Sleep Quality Index and PROs were measured using subscales of the Rand-36 questionnaire. Validated questionnaires for diet and physical activity were used and biomarkers were collected at routine clinic visits. A total subsample of 438 ovarian cancer survivors enrolled in NRG/GOG 0225- LIVES study with all available baseline measures were included in analyses. Descriptive statistics, general linear mixed models, and Pearson correlations were performed. Results: Reported pain was significantly higher in late chronotypes (P < 0.05) when compared to early and mid-chronotypes. Total sleep duration was significant between the 3 chronotypes (P < 0.05) with late chronotype experiencing less sleep (6.77 ± 1.67 hrs) than mid chronotype (7.04 ± 1.31 hrs) and early chronotype (7.56 ± 1.33 hrs). Higher reported pain was significantly correlated to poorer CRP levels (r = -0.198, P < 0.001) suggesting higher systemic inflammation and poorer blood insulin levels (r = -0.116, P < 0.05) independent of chronotype classification. All other subscales of the RAND 36 and physical activity were not associated with chronotype. Diet quality trended towards significance with a positive association observed in early and an inverse association in late chronotypes (P = 0.06). Conclusions: Late chronotypes reported higher levels of pain which was associated with poorer sleep and diet quality and higher levels of inflammation and insulin. More robust data, including actigraphy, are being analyzed and will provide additional insight of the role of circadian rhythm and phenotype on pain and key biomarkers in ovarian cancer survivors. Clinical trial information: NCT00719303." @default.
• W3028862023 created "2020-06-05" @default.
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• W3028862023 date "2020-05-20" @default.
• W3028862023 modified "2023-09-24" @default.
• W3028862023 title "Association of chronotype and pain at baseline in ovarian cancer survivors participating in a lifestyle intervention (NRG/GOG 0225)." @default.
• W3028862023 doi "https://doi.org/10.1200/jco.2020.38.15_suppl.6018" @default.
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