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• W3004872684 abstract "801 Background: The relative amount of activity and rest over the 24-hours, as measured by the dichotomy index I < O from actimetry records, is an independent predictor of overall survival and quality of life, and an early warning signal for emergency hospitalisation. The IDEAs study aimed to determine the sleep, physical and circadian pathologies in pts during their daily routine at home, which could lower I < O and be modifiable through personalised interventions. Methods: The rest-activity and surface temperature patterns were monitored in real time using a tele-transmitting chest sensor and a GPRS-platform for one week in 25 pts, with a WHO performance status of 0-1 and metastatic GIC (colorectal, 56%). Each pt completed questionnaires including Chronotype, HADS, and Pittsburgh Sleep Index, filled a precise diary of daily activities, meals and sleep times, and the MD Anderson Symptoms Inventory daily. I < O counts the In-bed activity bouts per min that are below the median activity Out-of-bed. Other pt-specific circadian parameters were estimated with spectral analyses and Hidden Markov models (HMM). I < O predictors were identified through correlation and regression analyses. Results: A poor I < O was found for 13 pts (52%). Self-reported scores for sleep quality or physical fitness showed no significant differences according to I < O. Yet HMM-modelled rest-activity revealed that pts with poor I < O had lower activity out-of-bed (median activity counts per minute, 110 vs 52, p = 0.001) and fractionated sleep (probability of remaining at rest when asleep, 94% vs 90%, p = 0.01). Poor I < O was significantly associated with an abnormal circadian rhythm in chest surface temperature, that was either wrongly timed or suppressed, for 83% of the pts as compared to 25% of those with a good I < O (p = 0.012). Conclusions: Nearly half of the pts displayed altered circadian rest-activity rhythm, with poor sleep and low daytime activity. In most of them, the circadian rhythm in body temperature, which critically regulates sleep, was abnormal. Exploration and specific treatment of sleep and circadian disorders are warranted for improving outcomes in cancer pts. Clinical trial information: 233972." @default.
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• W3004872684 date "2020-02-01" @default.
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• W3004872684 title "Relevance of real-time teletransmission of physical activity, sleep, and circadian rhythms from gastrointestinal cancer (GIC) patients (pts) during daily routine (IDEAs, IRAS 233972)." @default.
• W3004872684 doi "https://doi.org/10.1200/jco.2020.38.4_suppl.801" @default.
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