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The purpose of this study was to examine potential effects of reallocating time between sleep, sedentary and active behaviours on fatigue symptoms and quality of life in a sample of non-Hodgkin lymphoma survivors. Non-Hodgkin lymphoma survivors identified from the Western Australian Cancer Registry (N = 149) (response rate = 36%; median age = 64 years) wore an Actigraph® GT3X+ accelerometer for 7 days and completed the Fatigue Scale, the Functional Assessment of Cancer Therapy-General and the Pittsburgh Sleep Quality Index. We used isotemporal substitution methods in linear regression models to examine the potential effects of reallocating time between sleep, sedentary and activity behaviours on fatigue and quality of life. Data collection was conducted in Western Australia in 2013. Significant differences were observed for fatigue symptoms when 30 min per day of bouted moderate-to-vigorous physical activity (10 min) was reallocated from 30 min per day of sleep (5.7 points, 95% CI = 1.8, 9.7), sedentary time bouts (20 min) (5.7 points, 95% CI = 1.6, 9.7), sedentary time non-bouts (5.1 points, 95% CI = 1.0, 9.3) or light intensity activity (5.5 points, 95% CI = 1.5, 9.5). Isotemporal substitution effects of reallocating sedentary time, sleep and light physical activity with bouted physical activity was significantly associated with fatigue, but not quality of life. Findings from the present study may aid in the development and delivery of health behaviour interventions that are more likely to influence the health outcome of interest.

Objective: To assess differences in accelerometer-assessed moderate- to vigorous-intensity physical activity (MVPA), light-intensity physical activity, and sedentary time between cancer survivors and adults without cancer., Patients and Methods: Accelerometer data collected from 241 breast cancer survivors (ACCEL-Breast study, 2013) and 171 colon cancer survivors (ACCEL-Colon study, 2012-2013) were pooled with data collected from adults without cancer (Australian Diabetes, Obesity and Lifestyle accelerometer substudy, 2011-2012). Linear regression was used to estimate differences in physical activity and sedentary behavior levels between cancer survivors and adults without cancer, adjusted for potential confounding factors., Results: The mean MVPA was significantly higher among breast cancer survivors than among females who had not had cancer (29 vs 22 min/d; P<.001). Colon cancer survivors had significantly lower levels of light activity than did adults without cancer (311 vs 338 min/d; P<.001), more sedentary time (532 vs 507 min/d; P=.003), and more prolonged sedentary time (210 vs 184 min/d; P=.002)., Conclusion: Contrary to findings from previous research (based on self-reported physical activity), cancer survivors engaged in more (breast) or equivalent (colon) MVPA compared with adults without cancer. Differences between colon cancer survivors and adults without cancer for light activity and sedentary behavior highlight the importance of considering the full activity spectrum in the context of cancer control., (Copyright © 2017 Mayo Foundation for Medical Education and Research. Published by Elsevier Inc. All rights reserved.)

Purpose: Physical activity (PA) and sedentary behavior may influence the physical and mental health of breast cancer survivors; however, few studies have objectively measured these behaviors in this population. We used accelerometers to measure the PA and sedentary time levels of breast cancer survivors and examined the demographic, behavioral, and medical correlates of these behaviors using two complementary approaches., Methods: A total of 259 breast cancer survivors wore an accelerometer for 7 days during waking hours and completed a questionnaire. We used linear regression and classification trees to investigate correlates of PA and sedentary time., Results: The breast cancer survivors in this study (mean age = 61 years, mean time since diagnosis = 3 years) were sedentary for a daily average of 8.2 h, in light-intensity PA for 5.8 h and in moderate-to-vigorous intensity PA (MVPA) for 32 min, with 16 % meeting PA guidelines. Participants with high comorbidity were the least likely to be meeting guidelines (0 %), while a subgroup of participants with no/low comorbidity, a university degree, and higher levels of pre-diagnosis MVPA were the most likely to be meeting guidelines (47 %). Older participants (70+ years) were the most likely to have sedentary time levels at least twice as high as activity levels, while participants who were younger than 70 years and not in the lowest category of pre-diagnosis MVPA were the least likely., Conclusions: Interventions to facilitate physical activity and reduce sedentary time among breast cancer survivors should consider comorbidity status and previous PA experience.

Purpose: Engaging in positive health behaviours can improve quality of life amongst cancer survivors, whether this facilitates return to work is unknown. We examined associations of health behaviours with return to work outcomes following a diagnosis of colorectal cancer in middle-aged men and women (45-64 years)., Methods: We recruited 239 participants through the Queensland Cancer Registry between January 2010 and September 2011. Data were collected through telephone-administered interviews and postal questionnaires at 6 and 12 months post-diagnosis. Logistic regression examined likelihood of ceasing or reducing work, and Cox regression examined factors associated with time to return to work., Results: No significant associations were observed between health behaviours (fruit and vegetables consumption, alcohol consumption, smoking status, physical activity or sitting time) at 6 months and ceasing or reducing work at 12 months post-diagnosis. Participants who reported excessive sleep (≥9 h/day) were 2.69 times more likely to reduce work time or retire (relative to those sleeping the recommended 7 to <9 h/day; 95 % CI 1.06, 6.87, adjusted for cancer treatment). In Cox regression analysis, excessive sleep was associated with a longer work re-entry time (relative to sleeping 7 to <9 h/day; HR = 0.47; 95 % CI 0.22, 1.00, adjusted for education and cancer treatment)., Conclusions: Further research into how excessive sleep might be related to return to work amongst colorectal cancer survivors is warranted. Interventions focused on achieving optimal sleep patterns may assist colorectal cancer survivors to return to work and should be tested in future studies.

Background: Understanding of the physical activity and sedentary behavior of cancer survivors is limited by reliance on self-reported data. Here, we report the correlates, and patterns of accumulation, of physical activity (light, and moderate-vigorous; MVPA) and sedentary behavior, in colon cancer survivors, using accelerometer-based assessments., Methods: Colon cancer survivors from Alberta, Canada (n = 92), and Western Australia (n = 93) (overall response rate = 21 %) wore an Actigraph(®) GT3X+ accelerometer for seven consecutive days and completed a questionnaire in 2012-2013. Accelerometer data (60 s epochs) were summarized using Freedson activity cutpoints and were adjusted for wear time. Linear regression analyses, conducted 2014-2015, examined correlates for different intensities of activity., Results: Younger age, being employed, higher family income, and lower BMI were significantly correlated with MVPA, while gender, educational attainment, and BMI were correlated with light-intensity physical activity. Gender, comorbidities, and BMI were correlated with sedentary time. MVPA did not vary by day of the week, whereas the remaining time (as a sedentary/light ratio) showed significant variation, with Saturdays being less sedentary than average [corrected]. When considering time of day, we found that evenings were when the likelihood of both MVPA and sedentary time was highest., Conclusions: The low level of MVPA and high volume of sedentary time demonstrated by these objective data highlight the need for intervention in colon cancer survivors. The correlates and accumulation patterns described by this study may better inform interventions and translational research designed to increase physical activity and reduce sedentary behavior in colon cancer survivors.

Purpose: Research conducted on the general population indicates self-reported measures of physical activity and sedentary behaviour are inaccurate when compared with objective measures; however, it is not clear if this also applies to cancer survivors. In this study, we compared accelerometer-based and self-reported measures of moderate- to vigorous-intensity physical activity (MVPA) and sedentary time among colon cancer survivors., Methods: A total of 176 colon cancer survivors, recruited from the Western Australia and Alberta cancer registries, wore an Actigraph GT3X+ accelerometer for 7 days and completed self-reported questions about recent MVPA (Godin Leisure-Time Exercise Questionnaire) and usual sedentary time (Marshall Domain-Specific Sitting Questionnaire). Accelerometer data were processed using 60-s epochs and summarized using Freedson's cut points. Spearman's rho and intraclass correlation coefficients (ICCs) were used to assess correlation and agreement for daily MVPA and sedentary time estimates from the two methods., Results: Total mean minutes per day spent in MVPA was 12 min based on accelerometer data and 26 min based on self-reported data (P Difference  < 0.01). Correlation between the methods was fair (rho = 0.51); however, agreement was poor (ICC = 0.33). Mean daily time spent sedentary was similar in both methods (∼8.5 h); however, both correlation and agreement were poor (rho = 0.19, ICC = 0.16)., Conclusions: We found fair correlation but poor agreement between the self-reported and accelerometer-based assessments of MVPA used in this study. For sedentary time, both correlation and agreement between the two methods were poor. Studies of colon cancer survivors using these self-report measures are likely to have a considerable amount of exposure misclassification.

Purpose: Colorectal cancer survivors are at risk for poor health outcomes because of unhealthy lifestyles, but few studies have developed translatable health behavior change interventions. This study aimed to determine the effects of a telephone-delivered multiple health behavior change intervention (CanChange) on health and behavioral outcomes among colorectal cancer survivors., Methods: In this two-group randomized controlled trial, 410 colorectal cancer survivors were randomly assigned to the health coaching intervention (11 theory-based telephone-delivered health coaching sessions delivered over 6 months focusing on physical activity, weight management, dietary habits, alcohol, and smoking) or usual care. Assessment of primary (ie, physical activity [Godin Leisure Time Index], health-related quality of life [HRQoL; Short Form-36], and cancer-related fatigue [Functional Assessment of Chronic Illness Therapy Fatigue Scale]) and secondary outcomes (ie, body mass index [kg/m(2)], diet and alcohol intake [Food Frequency Questionnaire], and smoking) were conducted at baseline and 6 and 12 months., Results: At 12 months, significant intervention effects were observed for moderate physical activity (28.5 minutes; P = .003), body mass index (-0.9 kg/m(2); P = .001), energy from total fat (-7.0%; P = .006), and energy from saturated fat (-2.8%; P = .016). A significant intervention effect was reported for vegetable intake (0.4 servings per day; P = .001) at 6 months. No significant group differences were found at 6 or 12 months for HRQoL, cancer-related fatigue, fruit, fiber, or alcohol intake, or smoking., Conclusion: The CanChange intervention was effective for improving physical activity, dietary habits, and body mass index in colorectal cancer survivors. The intervention is translatable through existing telephone cancer support and information services in Australia and other countries.

Physical activity is well-established on the cancer survivorship research agenda, but prostate cancer survivors remain an understudied population. Additionally, the unique relationships between sedentary time and health outcomes have not yet been considered in this group. We examined the associations of accelerometer-assessed physical activity and sedentary time with waist circumference in 103 prostate cancer survivors from the National Health and Nutrition Examination Survey 2003-2004 and 2005-2006. Participants wore an Actigraph accelerometer for 7 days, and activity levels were summarised as moderate-to-vigorous intensity activity (accelerometer counts/minute ≥ 1952), light-intensity activity (counts/minute 100-1951) and sedentary time (counts/minute < 100). Moderate-to-vigorous intensity physical activity was inversely associated with waist circumference (β=-6.728, 95% CI: -12.267, -1.190, P= 0.020), equating to a top versus bottom quartile difference of 13.7 cm. No discernable relationship existed between light-intensity activity or sedentary time and adiposity. This is the first study to objectively measure the activity levels of prostate cancer survivors. Increasing moderate-to-vigorous activity may assist this population with weight management. More research into the relationships of light-intensity physical activity and sedentary behaviour with health outcomes among prostate cancer survivors is warranted, given the strong relationships seen in the broader population., (© 2010 Blackwell Publishing Ltd.)

Aims: To assess self-reported lifetime prevalence of cardiovascular disease (CVD) among colorectal cancer survivors, and examine the cross-sectional and prospective associations of lifestyle factors with co-morbid CVD., Methods: Colorectal cancer survivors were recruited (n=1966). Data were collected at approximately 5, 12, 24 and 36 months post-diagnosis. Cross-sectional findings included six CVD categories (hypercholesterolaemia, hypertension, diabetes, heart failure, kidney disease and ischaemic heart disease (IHD)) at 5 months post-diagnosis. Longitudinal outcomes included the probability of developing (de novo) co-morbid CVD by 36 months post-diagnosis. Lifestyle factors included body mass index, physical activity, television (TV) viewing, alcohol consumption and smoking., Results: Co-morbid CVD prevalence at 5 months post-diagnosis was 59%, and 16% of participants with no known CVD at the baseline reported de novo CVD by 36 months. Obesity at the baseline predicted de novo hypertension (odds ratio [OR]=2.20, 95% confidence intervals [CI]=1.09, 4.45) and de novo diabetes (OR=6.55, 95% CI=2.19, 19.53). Participants watching >4h of TV/d at the baseline (compared with <2h/d) were more likely to develop ischaemic heart disease by 36 months (OR=5.51, 95% CI=1.86, 16.34)., Conclusion: Overweight colorectal cancer survivors were more likely to suffer from co-morbid CVD. Interventions focusing on weight management and other modifiable lifestyle factors may reduce functional decline and improve survival., (Copyright © 2010 Elsevier Ltd. All rights reserved.)

Objective: Obesity and physical inactivity are poor prognostic indicators for breast cancer. Studies to date have relied on self-report measures of physical activity, which tend mainly to assess moderate-to-vigorous intensity leisure-time physical activity. We report the cross-sectional associations of objectively assessed physical activity and sedentary time with adiposity in a sample of breast cancer survivors from the United States., Methods: One hundred and eleven women from the National Health and Nutrition Examination Survey (NHANES) 2003-2004 and 2005-2006 reported a history of breast cancer. Participants wore an accelerometer for 7 days, and activity levels were summarized as moderate-to-vigorous intensity (accelerometer counts/min > or =1,952), light intensity (counts/min 100-1,951), and sedentary time (counts/min <100). Anthropometric measures were taken by study staff at examination centers., Results: Participants spent the majority of their day in sedentary time (66%) or in light intensity activities (33%). Log moderate-to-vigorous intensity physical activity was negatively associated with adiposity (waist circumference beta = -9.805 [95% CI: -15.836, -3.775]; BMI beta = -3.576 [95% CI: -6.687, -0.464]). Light intensity physical activity was negatively associated with adiposity; however, the fully adjusted models did not retain statistical significance. Similarly, sedentary time was positively associated with adiposity, but the fully adjusted models were not statistically significant., Conclusions: This is the first study to describe the objectively assessed physical activity and sedentary time of breast cancer survivors. Increasing moderate-to-vigorous and light intensity physical activity, and decreasing sedentary time, may assist with weight management and improve other metabolic health outcomes for breast cancer survivors.

Objective: To investigate the prospective relationships between television viewing time and weight gain in the 3 years following colorectal cancer diagnosis for 1,867 colorectal cancer survivors (body mass index (BMI) > or = 18.5 kg/m(2))., Methods: BMI, television viewing time, physical activity, and socio-demographic and clinical covariates were assessed at baseline (5 months), 24 months and 36 months post-diagnosis. Multiple linear regression was used to study independent associations between baseline television viewing time and BMI at 24 and 36 months post-diagnosis., Results: At both follow-up time points, there was a significant increase in mean BMI for participants reporting > or =5 h/day of television viewing compared to those watching <3 h/day at baseline (24 months: 0.72 kg/m(2) (0.31, 1.12), p < 0.001; 36 months: 0.61 kg/m(2) (0.14, 1.07), p = 0.01), independent of baseline BMI, gender, age, education, marital status, smoking, cancer site, cancer disease stage, treatment mode and co-morbidities. Additional adjustment for baseline physical activity did not change results., Conclusions: These findings suggest that a greater emphasis on decreasing television viewing time could help reduce weight gain among colorectal cancer survivors. This, in turn, could contribute to a risk reduction for co-morbid conditions such as type 2 diabetes and cardiovascular disease.

Background: Colorectal cancer survivors may suffer from a range of ongoing psychosocial and physical problems that negatively impact on quality of life. This paper presents the study protocol for a novel telephone-delivered intervention to improve lifestyle factors and health outcomes for colorectal cancer survivors., Methods/design: Approximately 350 recently diagnosed colorectal cancer survivors will be recruited through the Queensland Cancer Registry and randomised to the intervention or control condition. The intervention focuses on symptom management, lifestyle and psychosocial support to assist participants to make improvements in lifestyle factors (physical activity, healthy diet, weight management, and smoking cessation) and health outcomes. Participants will receive up to 11 telephone-delivered sessions over a 6 month period from a qualified health professional or 'health coach'. Data collection will occur at baseline (Time 1), post-intervention or six months follow-up (Time 2), and at 12 months follow-up for longer term effects (Time 3). Primary outcome measures will include physical activity, cancer-related fatigue and quality of life. A cost-effective analysis of the costs and outcomes for survivors in the intervention and control conditions will be conducted from the perspective of health care costs to the government., Discussion: The study will provide valuable information about an innovative intervention to improve lifestyle factors and health outcomes for colorectal cancer survivors., Trial Registration: ACTRN12608000399392.

Purpose: Increased physical activity in patients with colorectal cancer is related to improved recurrence-free and overall survival. Psychological distress after cancer may place patients at risk of reduced physical activity, but paradoxically may also act as a motivator for lifestyle change. The relationship between psychological distress and physical activity after cancer over time has not been described., Methods: A prospective survey of 1,966 (57% response) colorectal cancer survivors assessed the psychological distress variables of anxiety, depression, somatization, and cancer threat appraisal as predictors of physical activity at 5, 12, 24, and 36 months postdiagnosis; 978 respondents had valid data for all time points., Results: Higher somatization was associated with greater physical inactivity (relative risk ratio [RRR] = 1.12; 95% CI, 1.1 to 1.2) and insufficient physical activity (RRR = 1.05; 95% CI, 0.90 to 1.0). Respondents with a more positive appraisal of their cancer were significantly (P = .031) less likely to be inactive (RRR = 0.95; 95% CI, 0.90 to 1.0) or insufficiently active (RRR = 0.96). Fatigued and obese respondents and current smokers were more inactive. Respondents whose somatization increased between two time periods were less likely to increase their physical activity over the same period (P < .001). Respondents with higher anxiety at one time period were less likely to have increased their activity at the next assessment (P = .004). There was no association between depression and physical activity., Conclusion: Cancer survivors who experience somatization and anxiety are at greater risk of physical inactivity. The lack of a clear relationship between higher psychological distress and increasing physical activity argues against distress as a motivator to exercise in these patients.

Objective: To investigate the feasibility and short-term effectiveness of a lifestyle intervention for colorectal cancer (CRC) survivors., Methods: CanChange was telephone-delivered to 20 CRC survivors by health coaches over 6 weeks supported by an interactive participant handbook. We assessed program feasibility (program retention and satisfaction) and health outcomes [CRC-specific symptoms (fatigue, nausea, diarrhoea), quality of life (QOL), and lifestyle variables (physical activity, dietary intake, alcohol intake, smoking, body mass index (BMI))] at baseline and post-intervention., Results: Post-intervention, 76% of participants rated the program as excellent, 100% rated the health coach as excellent, and 75% rated the handbook as excellent. In addition, 80% said that CanChange addressed their issues, 72% said that CanChange helped them deal more effectively with their problems, and 100% said that CanChange made them more motivated to make positive life changes. Finally, all participants said that they would recommend CanChange to other CRC survivors. From baseline to post-intervention we observed: non-significant improvements in all CRC-specific symptoms and QOL; a significant decrease in processed meat intake [median (interquartile range): 1.0 (3.0) vs 0.0 (1.0), p=0.01]; as well as non-significant improvements in sedentary behaviour, and the proportion of participants meeting the national guidelines for fruit and vegetable intake. We observed no change in smoking status, while the results for alcohol intake, physical activity, and BMI were variable., Conclusions: CanChange was a feasible and potentially effective lifestyle intervention to improve health outcomes for CRC survivors. A large randomised controlled trial will follow to test the longer-term effects of this approach., ((c) 2009 John Wiley & Sons, Ltd.)

Objective: The present study prospectively assessed the influence of medical, socio-demographic, psychological, and lifestyle variables on physical, social/family, emotional, functional well-being and colorectal cancer-specific concerns in a population-based sample of colorectal cancer survivors., Methods: Participants (n=1822) were assessed at 6 and 24 months post-diagnosis. Predictor variables assessed at 6 months included socio-demographic and medical variables, symptoms/side-effects, body mass index, physical activity, optimism, social support, and cancer threat appraisal. Quality of life (QOL) was assessed at 6 and 24 months post-diagnosis using the Functional Assessment of Cancer Therapy - Colorectal (FACT-C)., Results: For each QOL subscale and for the overall FACT-C scale, 6 month scores were the strongest predictor of QOL scores at 24 months post-diagnosis (e.g. beta=0.447, p < 0.001 for overall QOL). Socio-demographic, medical, and psychosocial variables, but not lifestyle variables, differentially predicted domain specific QOL. Only cancer threat appraisal was associated with all five QOL domains., Conclusion: Cancer threat appraisal presents as a potentially modifiable variable for interventions seeking to improve QOL. Symptom management and lifestyle strategies to ameliorate the effects of co-morbidities, disease stage and troublesome symptoms such as faecal incontinence on QOL should also be included., ((c) 2008 John Wiley & Sons, Ltd.)

Goal: A better understanding of health behaviors after a cancer diagnosis is important, as these behaviors are related to physical functioning, disease recurrence, development of second primary cancers, and risk of other chronic diseases. Body weight and health behaviors (smoking status, alcohol consumption, and physical activity) were examined in a population-based sample of colorectal cancer survivors and compared to a matched population group., Materials and Methods: Data were collected by telephone interviews pre-diagnosis (retrospectively reported), 6 and 12 months post-diagnosis for colorectal cancer survivors (n = 1,250). Comparison data were from a population-based cancer risk survey (n = 6,277)., Results: Colorectal cancer survivors were most likely to be overweight/obese pre-diagnosis (66%) than at 6 months (54%) or 12 months post-diagnosis (61%). There was little variation from 6 to 12 months in the proportion of current smokers (7% and 8%, respectively) or high-risk drinkers (both 22%). The greatest changes were for physical activity, with 53% of survivor's sufficiently active pre-diagnosis, 32% at 6 months, and 38% at 12 months post-diagnosis. At 12 months, colorectal cancer survivors were more likely than the comparison group to be: underweight (OR = 2.14, 95% CI = 1.38-3.31); a former smoker (OR = 1.44, 95% CI = 1.26-1.63); a low-risk (OR = 1.25, 95% CI = 1.09-1.44) or high-risk drinker (OR = 1.70, 95% CI = 1.43-2.03); and insufficiently active (OR = 1.57, 95% CI = 1.34-1.83) or inactive (OR = 2.76, 95% CI = 2.39-3.19). However, colorectal cancer survivors were significantly less likely to be a current smoker (OR = 0.68, 95% CI = 0.54-0.85)., Conclusions: Our findings show particular scope for physical activity interventions for colorectal cancer survivors. Improving the general health of cancer survivors should help to decrease morbidity in this population and associated health system expenditure.

Purpose: Physical activity can enhance quality of life for cancer survivors. However, few longitudinal studies have examined whether physical activity has a sustained effect on improvements in quality of life. The present study aims to examine the relationships between physical activity and quality of life over 2 years after a colorectal cancer diagnosis., Patients and Methods: Data were collected within the Colorectal Cancer and Quality of Life Study, in which 1,966 people diagnosed with colorectal cancer were recruited through the Queensland Cancer Registry. Participants completed telephone interviews at approximately 6, 12, and 24 months after diagnosis. Generalized linear mixed models were used to estimate the overall, interindividual, and intraindividual level independent effects of participation in physical activity on quality of life., Results: There was an overall independent association between physical activity and quality of life. At a given time point, participants achieving at least 150 minutes of physical activity per week had an 18% higher quality of life score than those who reported no physical activity. Significant associations were also present at the interindividual level (differences between participants) and intraindividual level (within participant changes)., Conclusion: These findings suggest that the positive association between physical activity and quality of life is consistent over time. Encouraging colorectal cancer survivors to be physically active may be a helpful strategy for enhancing quality of life.

Background: Physical activity can provide benefits to cancer survivors, including reduced symptoms and treatment side effects, improved overall quality of life, and decreased risk of other chronic diseases., Purpose: The aim of the study was to describe physical activity before and after diagnosis of colorectal cancer and to examine the associations with sociodemographic and disease-related variables., Methods: Telephone interviews were conducted with 1,996 colorectal cancer survivors recruited through a cancer registry., Results: In comparison to prediagnosis activity levels, there were 21% fewer participants meeting the physical activity and health guideline (150 min of moderate-intensity physical activity per week) postdiagnosis. Meeting the guideline postdiagnosis was associated with being male, living outside of the state capital city, having a higher education, having a healthy body mass index, not smoking, having had surgery only, and no reported fatigue. Attributes associated with a decrease in physical activity following diagnosis were being female, living within the state capital city, having a lower level of education, having a stoma, having adjuvant therapy, and experiencing fatigue., Conclusions: There is considerable scope for targeted interventions to increase the physical activity of colorectal cancer survivors, particularly for those groups that we have identified as being less active and/or have reduced their activity.

Objective: To examine the associations between physical activity and quality of life for colorectal cancer survivors; and to describe the associations of medical and sociodemographic attributes with overall quality of life, and their moderating effects on the relationships between physical activity and quality of life., Methods: Telephone interviews were conducted with 1,996 colorectal cancer survivors recruited through the Queensland Cancer Registry. Data were collected on current quality of life; leisure-time physical activity pre- and post-diagnosis; cancer treatment and side-effects; and general sociodemographic attributes. Hierarchical generalized linear models identified variables significantly associated with quality of life., Results: After controlling for sociodemographic variables, disease-specific variables, treatment side-effects, and pre-diagnosis leisure-time physical activity, there were significant differences in quality of life scores by post-diagnosis physical activity category. Compared to participants who were inactive after their diagnosis, those who were sufficiently active had a 17.0% higher total quality of life score. Physical activity also had a significant independent positive association with the physical well-being, functional well-being, and additional concerns subscales of the FACT-C., Conclusions: Our findings demonstrate that quite modest changes in leisure-time physical activity are associated with quality of life. Colorectal cancer survivors may benefit from a more active lifestyle.

Purpose: This study was conducted to examine the test-retest reliability of a measure of prediagnosis physical activity participation administered to colorectal cancer survivors recruited from a population-based state cancer registry., Methods: A total of 112 participants completed two telephone interviews, 1 month apart, reporting usual weekly physical activity in the year before their cancer diagnosis. Intraclass correlation coefficients (ICC) and standard error of measurement (SEM) were used to describe the test-retest reliability of the measure across the sample; the Bland-Altman approach was used to describe reliability at the individual level. The test-retest reliability for categorized total physical activity (active, insufficiently active, sedentary) was assessed using the kappa statistic., Results: When the complete sample was considered, the ICC ranged from 0.40 (95% CI: 0.24, 0.55) for vigorous gardening to 0.77 (95% CI: 0.68, 0.84) for moderate physical activity. The SEM, however, were large, indicating high measurement error. The Bland-Altman plots indicated that the reproducibility of data decreases as the amount of physical activity reported each week increases. The kappa coefficient for the categorized data was 0.62 (95% CI: 0.48, 0.76)., Conclusion: Overall, the results indicated low levels of repeatability for this measure of historical physical activity. Categorizing participants as active, insufficiently active, or sedentary provides a higher level of test-retest reliability.