Browsing by Author "Ning, Yi"
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- Impact of physical activity and sleep quality on quality of life of rural residents with and without a history of cancer: findings of the Day and Night StudyRafie, Carlin; Ning, Yi; Wang, Aiping; Gao, Xiang; Houlihan, Robert (Dove Press, 2018)Background: Lifestyle behaviors may impact quality of life (QoL) in cancer survivors. The impact of physical activity and sleep quality on QoL in rural cancer survivors has not been well studied, however. Methods: Individuals with and without a history of cancer were recruited from rural Virginia. We collected information on physical activity (PAL), sleep quality (psqi), and QoL (Short Form-36). Additional dimensions of physical activity and sleep were measured including ambient light exposure and sleep duration via Actiwatch2, and serum vitamin D and urine melatonin, which are markers of outdoor activity and sleep. Results: 124 cancer survivors and 48 cancer-free individuals enrolled in the study. Mean age was 59, with majority women (89%) and Caucasian (76%). Breast cancer was most common (72%), and mean time from diagnosis to the survey was 8.1 years. Survivors were more sedentary and had significantly worse sleep quality and physical and mental health, relative to cancer-free individuals (p<0.05l). Quality of sleep of survivors and those cancer-free was significantly associated with physical (r=-0.335,p<0.001; r=-0.340,p<0.049 ) and mental health (r=-0.406,p=<0.001; r=-0.483,p<0.004) independent of age, gender, BMI, diabetes and CVD. In survivors, PAL was associated with physical and mental health (r=0.201,p=0.033; r=0.200,p=0.034), and outdoor activity was associated with mental health (r=0.271,p=0.005). Vitamin D3 was associated with physical health (rs=0.238, p=0.010) and outdoor activity (rs=0.236, p=0.012) in survivors. No association was found between melatonin, sleep quality or QoL. Physical activity, sleep quality, cancer status, BMI, and diabetes were predictive of physical health while physical activity and sleep quality were predictive of mental health. Conclusion: Quality of sleep and physical activity are significant predictors of mental and physical health in cancer survivors. Outdoor activity should be encouraged to improve mental health and vitamin D status. Sleep and outdoor activity interventions should have special consideration in rural cancer survivor care planning.
- Physical Activity and Sedentary Behavior of Cancer Survivors and Non-Cancer Individuals: Results from a National SurveyKim, Roy B.; Phillips, Allison; Herrick, Kirsten; Helou, Marieka; Rafie, Carlin; Anscher, Mitchell S.; Mikkelsen, Ross B.; Ning, Yi (PLoS, 2013-03-06)Increasing physical activity and decreasing sedentary behavior are associated with a higher quality of life and lower mortality rates for cancer survivors, a growing population group. Studies detailing the behavior of cancer survivors are limited. Therefore, we investigated physical activity and sedentary behavior of cancer survivors using data from the National Health and Nutrition Examination Survey (NHANES) 2007-2010. Participants were those who provided physical activity and sedentary behavior data. Those who were pregnant, <20 years old, or <3 years from their cancer diagnosis were excluded. A cancer case was a self-reported diagnosis by a physician. We identified 741 cancer survivors and 10,472 non-cancer participants. After adjustment for age, race, gender, education status, body mass index, and smoking status, cancer survivors (n = 10,472) reported significantly longer duration of sedentary behavior (OR = 1.42, 95% CI (1.12, 1.80) for 8 or more hours, p-value for trend = 0.09), compared to non-cancer participants (n = 741). They also reported non-significant increases in maximum intensity, duration, frequency, and energy expenditure, whereas they reported significant increases in moderate intensity (OR = 1.26, 95% CI (1.01, 1.57)), moderate frequency (1-4 times/week) (OR = 1.32, 95% CI (1.00, 1.74)), and moderate energy expenditure (4018.5-7623.5 kcal) (OR = 1.30, 95% CI (1.00, 1.71)) of physical activity, compared to non-cancer participants. These patterns are similar for breast and prostate cancer survivors, with prostate cancer survivors more likely to engage in physical activity for more than one hour per day (OR = 1.98, 95% CI (1.05, 3.71)). Our findings suggest that cancer survivors tend to have more physical activity, but they are also more likely to engage in sedentary behavior. © 2013 Kim et al.