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Dale P Sandler - One of the best experts on this subject based on the ideXlab platform.
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a prospective study of Occupational physical Activity and breast cancer risk
Cancer Causes & Control, 2015Co-Authors: Christine C Ekenga, Christine G Parks, Dale P SandlerAbstract:Purpose Physical Activity has been associated with reduced breast cancer risk, but studies of Occupational Activity have produced inconsistent results. The purpose of this study was to evaluate the relationship between Occupational physical Activity and breast cancer in a prospective study of women with a family history of breast cancer.
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a prospective study of Occupational physical Activity and breast cancer risk
Cancer Causes & Control, 2015Co-Authors: Christine C Ekenga, Christine G Parks, Dale P SandlerAbstract:Physical Activity has been associated with reduced breast cancer risk, but studies of Occupational Activity have produced inconsistent results. The purpose of this study was to evaluate the relationship between Occupational physical Activity and breast cancer in a prospective study of women with a family history of breast cancer. We studied breast cancer risk in 47,649 Sister Study participants with an Occupational history. Information on Occupational Activity and breast cancer risk factors was collected during baseline interviews (2004–2009). Physical Activity at each job was self-reported and categorized as mostly sitting, sitting and standing equally, mostly standing, and active. Multivariable Cox proportional hazards regression was used to evaluate associations between lifetime Occupational Activity and incident breast cancer, after adjusting for established risk factors and recreational Activity. During follow-up, a total of 1,798 breast cancer diagnoses were reported. Compared with women who did not spend any time in active jobs, women who spent a high proportion (≥75 %) of their working years in active jobs had a reduced risk of breast cancer (HR 0.72; 95 % CI 0.52–0.98). Associations were strongest among overweight (HR 0.64; 95 % CI 0.42–0.98) and postmenopausal (HR 0.67; 95 % CI 0.45–0.98) women. Occupational Activity was associated with a reduced risk of breast cancer. Occupational Activity is a domain of physical Activity that should be further examined in studies of postmenopausal breast cancer risk. Additional research is necessary to better understand the mechanisms underlying the relationships between Occupational Activity, body size, and breast cancer.
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Leisure-time physical Activity in relation to Occupational physical Activity among women.
Preventive medicine, 2015Co-Authors: Christine C Ekenga, Christine G Parks, Lauren E Wilson, Dale P SandlerAbstract:Abstract Objective The objective of this study is to examine the association between Occupational physical Activity and leisure-time physical Activity among US women in the Sister Study. Methods We conducted a cross-sectional study of 26,334 women who had been employed in their current job for at least 1 year at baseline (2004–2009). Occupational physical Activity was self-reported and leisure-time physical Activity was estimated in metabolic equivalent hours per week. Log multinomial regression was used to evaluate associations between Occupational (sitting, standing, manually active) and leisure-time (insufficient, moderate, high) Activity. Models were adjusted for age, race/ethnicity, education, income, geographic region, and body mass index. Results Only 54% of women met or exceeded minimum recommended levels of leisure-time physical Activity (moderate 32% and high 22%). Women who reported sitting (prevalence ratio (PR) = 0.82, 95% confidence interval (CI): 0.74–0.92) or standing (PR = 0.84, 95% CI: 0.75–0.94) most of the time at work were less likely to meet the requirements for high leisure-time physical Activity than manually active workers. Associations were strongest among women living in the Northeast and the South. Conclusion In this nationwide study, low Occupational Activity was associated with lower leisure-time physical Activity. Women who are not active in the workplace may benefit from strategies to promote leisure-time physical Activity.
Christine C Ekenga - One of the best experts on this subject based on the ideXlab platform.
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a prospective study of Occupational physical Activity and breast cancer risk
Cancer Causes & Control, 2015Co-Authors: Christine C Ekenga, Christine G Parks, Dale P SandlerAbstract:Purpose Physical Activity has been associated with reduced breast cancer risk, but studies of Occupational Activity have produced inconsistent results. The purpose of this study was to evaluate the relationship between Occupational physical Activity and breast cancer in a prospective study of women with a family history of breast cancer.
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a prospective study of Occupational physical Activity and breast cancer risk
Cancer Causes & Control, 2015Co-Authors: Christine C Ekenga, Christine G Parks, Dale P SandlerAbstract:Physical Activity has been associated with reduced breast cancer risk, but studies of Occupational Activity have produced inconsistent results. The purpose of this study was to evaluate the relationship between Occupational physical Activity and breast cancer in a prospective study of women with a family history of breast cancer. We studied breast cancer risk in 47,649 Sister Study participants with an Occupational history. Information on Occupational Activity and breast cancer risk factors was collected during baseline interviews (2004–2009). Physical Activity at each job was self-reported and categorized as mostly sitting, sitting and standing equally, mostly standing, and active. Multivariable Cox proportional hazards regression was used to evaluate associations between lifetime Occupational Activity and incident breast cancer, after adjusting for established risk factors and recreational Activity. During follow-up, a total of 1,798 breast cancer diagnoses were reported. Compared with women who did not spend any time in active jobs, women who spent a high proportion (≥75 %) of their working years in active jobs had a reduced risk of breast cancer (HR 0.72; 95 % CI 0.52–0.98). Associations were strongest among overweight (HR 0.64; 95 % CI 0.42–0.98) and postmenopausal (HR 0.67; 95 % CI 0.45–0.98) women. Occupational Activity was associated with a reduced risk of breast cancer. Occupational Activity is a domain of physical Activity that should be further examined in studies of postmenopausal breast cancer risk. Additional research is necessary to better understand the mechanisms underlying the relationships between Occupational Activity, body size, and breast cancer.
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Leisure-time physical Activity in relation to Occupational physical Activity among women.
Preventive medicine, 2015Co-Authors: Christine C Ekenga, Christine G Parks, Lauren E Wilson, Dale P SandlerAbstract:Abstract Objective The objective of this study is to examine the association between Occupational physical Activity and leisure-time physical Activity among US women in the Sister Study. Methods We conducted a cross-sectional study of 26,334 women who had been employed in their current job for at least 1 year at baseline (2004–2009). Occupational physical Activity was self-reported and leisure-time physical Activity was estimated in metabolic equivalent hours per week. Log multinomial regression was used to evaluate associations between Occupational (sitting, standing, manually active) and leisure-time (insufficient, moderate, high) Activity. Models were adjusted for age, race/ethnicity, education, income, geographic region, and body mass index. Results Only 54% of women met or exceeded minimum recommended levels of leisure-time physical Activity (moderate 32% and high 22%). Women who reported sitting (prevalence ratio (PR) = 0.82, 95% confidence interval (CI): 0.74–0.92) or standing (PR = 0.84, 95% CI: 0.75–0.94) most of the time at work were less likely to meet the requirements for high leisure-time physical Activity than manually active workers. Associations were strongest among women living in the Northeast and the South. Conclusion In this nationwide study, low Occupational Activity was associated with lower leisure-time physical Activity. Women who are not active in the workplace may benefit from strategies to promote leisure-time physical Activity.
Barbara E Ainsworth - One of the best experts on this subject based on the ideXlab platform.
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Occupational physical Activity in the atherosclerosis risk in communities study
Annals of Epidemiology, 2003Co-Authors: Kelly R Evenson, Wayne D Rosamond, Jianwen Cai, Mark A Pereira, Barbara E AinsworthAbstract:PURPOSE: Accumulation of physical Activity throughout the day is recommended to reduce health risks and enhance quality of life. Yet, many epidemiologic studies measure leisure Activity only, without assessment of Occupational Activity. The purposes of this study were to describe Occupational Activity and to quantify the association between Occupational and leisure Activity in 2991 African American and 8566 White middle-aged adults. METHODS: Physical Activity was measured by the Baecke questionnaire in 1987–89 for participants 45 to 64 years of age in the Atherosclerosis Risk in Communities Study. RESULTS: Reported Occupational Activity was greater among African American men and women compared to White men and women. Leisure Activity was greater among White men and women compared to African American men and women. Work indices (range—1 (low) to 5 (high)) were highest among African American women (2.78) and men (2.72), followed by White men (2.55) and women (2.45), adjusted for age, study center, body mass index, and perceived health status. Those with the highest Occupational Activity had lower participation in any sport or exercise than those with lower Occupational Activity across race-gender groups. CONCLUSIONS: This data suggests that studies relying solely on leisure Activity may miss important information provided by Occupational physical Activity.
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estimating energy expenditure from the minnesota leisure time physical Activity and tecumseh Occupational Activity questionnaires a doubly labeled water validation
Journal of Clinical Epidemiology, 2002Co-Authors: Joan M. Conway, Melinda L Irwin, Barbara E AinsworthAbstract:An accurate, simple method for assessing energy expenditure in individuals and in free-living populations continues to be elusive. To compare estimates of energy expenditure (EE) from a combination of two previously validated physical Activity questionnaires: Tecumseh Occupational (EETEC) and a 4-wk history version of the Minnesota Leisure Time Physical Activity that included household activities (EEMNLTPA) and EE from sleep (EESLEEP), to EE obtained from doubly labeled water (EEDLW). We studied free-living males (n = 24) eating a controlled diet designed to maintain body weight and determined EE from doubly labeled water (DLW) during 14 days and EE from physical Activity instruments used in epidemiological studies (EETEC and EEMNLTPA). There was excellent agreement between EEDLW (mean ± SEM, 13.55 ± 0.38 MJ/d) and EETEC + EEMNLTPA + EESLEEP (EETOTAL1) (13.79 ± 0.89 MJ/d) with a difference of only 1.0% ± 5.4%. When the EE from watching TV, reading, and childcare activities was added the total EE (EETOTAL2) (14.87 ± 0.90 MJ/D) overestimated EEDLW by 8.9% ± 5.4%. Both of these estimates of EE had significant regressions against EEDLW (EETEC + EEMNLTPA + EESLEEP, R2 = 0.38, P < 0.001; EETOTAL2, R2 = 0.39, P < 0.001). Men whose occupations involved significant intermittent moderate Activity had the largest disagreement between EEDLW and estimates from the questionnaires. This investigation demonstrates that a combination of previously validated physical Activity questionnaires can be used to accurately determine the mean energy expenditure of a population of employed males.
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accuracy of recall of Occupational physical Activity by questionnaire
Journal of Clinical Epidemiology, 1999Co-Authors: Barbara E Ainsworth, Mark T Richardson, David R Jacobs, Arthur S Leon, Barbara SternfeldAbstract:Abstract The validity of the Tecumseh Occupational Activity Questionnaire (TOQ) and a modified Seven Day Recall (SDR) was measured in 46 healthy women, ages 20–60 years (mean ± SD, 39.4 ± 11.8). Occupational data were compared with direct (7-day Occupational Activity records and Caltrac accelerometer) and indirect (maximal oxygen uptake and percent body fat) measures of physical Activity status. Physical Activity survey and Occupational record data were log transformed to normalize skewed distributions. Intraclass correlations ranged from r = 0.26 to 0.73 (P r = 0.32 to 0.35 (P r = 0.46 (P r = 0.45 (P r = 0.34, P r = 0.32, P 0.05). These results suggest that the TOQ and SDR both provide reasonably accurate measurements of light and moderate intensity Occupational physical Activity.
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comprehensive evaluation of the minnesota leisure time physical Activity questionnaire
Journal of Clinical Epidemiology, 1994Co-Authors: Mark T Richardson, Barbara E Ainsworth, David R Jacobs, Arthur S Leon, R C SerfassAbstract:The accuracy of the Minnesota Leisure Time Physical Activity (LTPA) Questionnaire (a 1-year survey of non-Occupational Activity used in MRFIT) was studied in 78 men and women, age 20-59 years, by comparing survey results to the following measures obtained over a year's duration: six 48-hour physical Activity records; fourteen 48-hour Caltrac accelerometer readings (Caltrac); 14 administrations of a 4-week version of the LTPA Questionnaire (FWH); 3 VO2peak determinations and percent body fat (% BF). The LTPA Questionnaire demonstrated: weak to moderate associations with % BF (r = -0.24) and with VO2peak (r = 0.47); a weak association with Caltrac readings expressed as MET.minutes.day-1 (r = 0.23); strong associations with corresponding activities reported on the FWH; and moderate associations with total and heavy activities reported in the physical Activity record, but no associations with moderate and light activities. Furthermore, several types of LTPA were found to be either under-represented or not currently included in the Minnesota LTPA Questionnaire. It is concluded that although validation results were found to be quite good, several possible refinements were identified, which should improve the accuracy of the Minnesota LTPA Questionnaire in assessing habitual physical Activity.
Brigid M Lynch - One of the best experts on this subject based on the ideXlab platform.
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domain specific physical Activity and sedentary behaviour in relation to colon and rectal cancer risk a systematic review and meta analysis
International Journal of Epidemiology, 2017Co-Authors: Shahid Mahmood, Dallas R English, Robert J Macinnis, Amalia Karahalios, Brigid M LynchAbstract:Background Physical Activity is associated with reduced risk of colorectal cancer, but most epidemiological studies have focused on Occupational and recreational physical Activity. The evidence for other domains of Activity, and for sedentary behaviour, is limited. Methods Medline, Embase and Web of Science were searched from inception to December 2015 for studies examining domain-specific physical Activity or sedentary behaviour and the risk of colon and/or rectal cancer. We extracted maximally adjusted relative risks (RRs) except when RRs not adjusted for body mass index, were also presented. We used random-effects meta-analysis to compute pooled RRs comparing the highest versus the lowest level of exposure. We used meta-regression to assess sources of heterogeneity in estimates. Results We identified 17 cohort and 21 case-control studies, of which 17 had Occupational data, 23 had recreational data, three each had data on transport and household physical Activity domains, and 6 studies had data on Occupational sedentary behaviour. The pooled relative risks (RRs) for colon cancer were 0.74 (95% confidence interval (CI): 0.67, 0.82) for Occupational Activity, 0.80 (95% CI: 0.71, 0.89) for recreational Activity, 0.66 (95% CI: 0.45, 0.98) for transport-related physical Activity, 0.85 (95% CI: 0.71, 1.02) for household physical Activity, and 1.44 (95% CI: 1.28, 1.62) for Occupational sedentary behaviour. For rectal cancer, the pooled RRs were 0.88 (95% CI: 0.79, 0.98) for Occupational Activity, 0.87 (95% CI: 0.75, 1.01) for recreational Activity, 0.88 (95% CI: 0.70, 1.12) for transport-related physical Activity, 1.01 (95% CI: 0.80, 1.27) for household physical Activity, and 1.02 (95% CI: 0.82, 1.28) for Occupational sedentary behaviour. Conclusions In addition to increasing Occupational and recreational physical Activity, promoting physical Activity during transport and reducing sedentary behaviour in the workplace may also be useful colorectal cancer prevention strategies.
Kathleen M Egan - One of the best experts on this subject based on the ideXlab platform.
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lifetime recreational and Occupational physical Activity and risk of in situ and invasive breast cancer
Cancer Epidemiology Biomarkers & Prevention, 2007Co-Authors: Brian L Sprague, Amy Trenthamdietz, Polly A Newcomb, Linda Titusernstoff, John M Hampton, Kathleen M EganAbstract:Numerous studies have observed reduced breast cancer risk with increasing levels of physical Activity, yet these findings have been inconsistent about optimal times of Activity and effect modification by other factors. We investigated the association between recreational and Occupational physical Activity and breast cancer risk in a population-based case-control study in Massachusetts, New Hampshire, and Wisconsin. During structured telephone interviews, 7,630 controls, 1,689 in situ , and 6,391 invasive breast cancer cases, ages 20 to 69 years, reported lifetime history of recreational physical Activity and occupation. Neither lifetime recreational nor strenuous Occupational physical Activity appeared to be associated with risk of breast carcinoma in situ . In contrast, recreational physical Activity was associated with a reduced risk of invasive breast cancer. After adjustment for potentially confounding factors, women averaging >6 h per week of strenuous recreational Activity over their lifetime had a 23% reduction in the odds ratio of invasive breast cancer when compared with women reporting no recreational Activity (95% confidence interval, 0.65-0.92; P trend = 0.05). However, this reduction in risk was limited to women without a first-degree family history of breast cancer ( P interaction = 0.02). Inverse associations were observed for physical Activity early in life, in the postmenopausal years, and in the recent past, but these findings were confined to women without a family history of breast cancer. Lifetime strenuous Occupational Activity was not associated with invasive breast cancer risk. These results provide further evidence that, for most women, physical Activity may reduce the risk of invasive breast cancer. (Cancer Epidemiol Biomarkers Prev 2007;16(2):236–43)
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lifetime recreational and Occupational physical Activity and risk of in situ and invasive breast cancer
Cancer Epidemiology Biomarkers & Prevention, 2007Co-Authors: Brian L Sprague, Amy Trenthamdietz, Polly A Newcomb, Linda Titusernstoff, John M Hampton, Kathleen M EganAbstract:Numerous studies have observed reduced breast cancer risk with increasing levels of physical Activity, yet these findings have been inconsistent about optimal times of Activity and effect modification by other factors. We investigated the association between recreational and Occupational physical Activity and breast cancer risk in a population-based case-control study in Massachusetts, New Hampshire, and Wisconsin. During structured telephone interviews, 7,630 controls, 1,689 in situ, and 6,391 invasive breast cancer cases, ages 20 to 69 years, reported lifetime history of recreational physical Activity and occupation. Neither lifetime recreational nor strenuous Occupational physical Activity appeared to be associated with risk of breast carcinoma in situ. In contrast, recreational physical Activity was associated with a reduced risk of invasive breast cancer. After adjustment for potentially confounding factors, women averaging >6 h per week of strenuous recreational Activity over their lifetime had a 23% reduction in the odds ratio of invasive breast cancer when compared with women reporting no recreational Activity (95% confidence interval, 0.65-0.92; P(trend) = 0.05). However, this reduction in risk was limited to women without a first-degree family history of breast cancer (P(interaction) = 0.02). Inverse associations were observed for physical Activity early in life, in the postmenopausal years, and in the recent past, but these findings were confined to women without a family history of breast cancer. Lifetime strenuous Occupational Activity was not associated with invasive breast cancer risk. These results provide further evidence that, for most women, physical Activity may reduce the risk of invasive breast cancer.
