scholarly journals Multiple imputation to deal with missing objectively-measured physical activity data: findings from two cohorts

2021 ◽  
Vol 26 ◽  
pp. 1-8
Author(s):  
Rafaela Costa Martins ◽  
Bruna Gonçalves C. da Silva ◽  
Cauane Blumenberg ◽  
Luiza Isnardi Ricardo ◽  
Shana Ginar da Silva ◽  
...  
Keyword(s):  
Physical Activity ◽  
Multiple Imputation ◽  
Birth Cohort ◽  
Skin Color ◽  
Accelerometer Data ◽  
Activity Data ◽  
Mean Values ◽  
Almost All ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

The objective of this article was to describe patterns of losses of information regarding accelerometer data and to assess the use of multiple imputation to generate physical activity estimates for individuals without accelerometry data. Two birth cohort studies from Pelotas (Brazil) with participants aged 22 and 11-years old assessed objectively measured physical activity differences between complete and imputed cases. Mean values of overall physical activity for complete cases (n1993 = 2,985 and n2004 = 3,348) and for complete cases plus imputed cases (n1993 = 760 and n2004 = 79) were described according to predictors. Male individuals, participants with black skin color, and less schooled individuals presented higher averages of overall physical activity than their counterparts. Almost all imputed estimates were comparable to the complete cases, and the highest difference found was 0.7 mg for the first quintile of socioeconomic status of the 1993 birth cohort. Multiple imputation is a positive technique to deal with missing data from objectively measured physical activity. It provides a set of relevant variables to be used in order to efficiently predict accelerometer data.

scholarly journals Objectively measured physical activity according to the periods of the day in the Pelotas Cohort

2020 ◽  
Vol 25 ◽  
pp. 1-10
Author(s):  
Andrea Wendt ◽  
Fernando C. Wehrmeister ◽  
Luiza I. C. Ricardo ◽  
Bruna Gonçalves C. da Silva ◽  
Rafaela C. Martins ◽  
...  
Keyword(s):  
Physical Activity ◽  
Young Adults ◽  
Birth Cohort ◽  
Socioeconomic Position ◽  
Triaxial Accelerometer ◽  
Cross Sectional ◽  
Cross Sectional Analysis ◽  
Objectively Measured ◽  
Sectional Analysis ◽  
Objectively Measured Physical Activity

This study aims to describe objectively measured physical activity (PA) in different periods of the day in young adults according to sex, socioeconomic position and during weekdays and weekends. This is a cross-sectional analysis carried out with the participants of the 1993 Pelotas Birth Cohort at 22 years. PA was assessed by triaxial accelerometer. Descriptive analyses were performed presenting the time spent on light PA (LPA) and bouted moderate to vigorous PA (MVPA) in different periods of the day (morning - 6am to 11:59 am, afternoon – 12pm to 7:59 pm and night – 8pm to 11:59pm). The present study included 2,766 individuals (48.2% male and 51.8% female). LPA was higher among women, while bouted MVPA levels were higher among men. The median of  PA was higher on weekdays compared to weekends for all intensities. The bouted MVPA medians in the morning and at night were zero minutes for all days and both sexes. The richest group presented a higher percentage of individuals with zero minutes. PA may vary according to different periods of the day and intensity. The absence of PA practice was markedly influenced by sex and socioeconomic position.

scholarly journals Residential relocation trajectories and neighborhood density, mixed land use and access networks as predictors of walking and bicycling in the Northern Finland Birth Cohort 1966

2019 ◽  
Vol 16 (1) ◽  
Author(s):  
Mikko Kärmeniemi ◽  
Tiina Lankila ◽  
Tiina Ikäheimo ◽  
Soile Puhakka ◽  
Maisa Niemelä ◽  
...  
Keyword(s):  
Physical Activity ◽  
Land Use ◽  
Birth Cohort ◽  
Neighborhood Density ◽  
Access Networks ◽  
Residential Relocation ◽  
Mixed Land Use ◽  
Objectively Measured ◽  
Good Access ◽  
Objectively Measured Physical Activity

Abstract Background Given the high global prevalence of physical inactivity, there is a need to design cities that support active modes of transportation. High density diverse neighborhoods with good access networks have been associated with enhanced walking and cycling, but there is a lack of large-scale longitudinal studies utilizing a life course perspective to model residential relocation trajectories. The objectives of the present longitudinal study were to model and visualize residential relocation trajectories between 31 and 46 years of age based on neighborhood density, mixed land use and access networks (DMA), and to assess neighborhood DMA as a predictor of self-reported regular walking and cycling and objectively measured physical activity. Methods Based on data from the Northern Finland Birth Cohort 1966 (N = 5947), we used self-reported regular walking and cycling and objectively measured physical activity as outcome variables and objectively assessed neighborhood DMA as the main explanatory variable. We conducted sequence analysis to model residential relocation trajectories, and generalized linear mixed models and Fisher’s exact test were used to explore longitudinal associations between neighborhood DMA and physical activity. Results Over 80% of the participants lived in a neighborhood with the same level of neighborhood DMA during the follow-up. Relocation occurred more often from higher to lower DMA neighborhoods than reverse. Increased neighborhood DMA was associated with increased regular walking (OR 1.03; 95% CI: 1.00, 1.05; p = 0.023) and cycling (OR 1.17; 95% CI: 1.12, 1.23; p <  0.001). Residential relocation trajectory from lower to highest neighborhood DMA increased the odds of starting regular walking (OR 3.15; 95% CI: 1.50, 7.14; p = 0.001) and cycling (OR 2.63; 95% CI: 1.23, 5.79; p = 0.009) as compared to higher to lower neighborhood DMA trajectory. Conclusions The results strongly support the hypothesis that increasing urban DMA can enhance regular walking and cycling at population level and so improve public health. The findings have implications for zoning and transportation policies, favoring the creation of dense and diverse neighborhoods with good access networks to support regular walking and cycling.

scholarly journals Operationalizing and Testing the Concept of a Physical Activity Desert

2021 ◽  
pp. 1-8
Author(s):  
Russell R. Pate ◽  
Marsha Dowda ◽  
Ruth P. Saunders ◽  
Natalie Colabianchi ◽  
Morgan N. Clennin ◽  
...  
Keyword(s):  
Physical Activity ◽  
Cross Sectional Study ◽  
Fifth Grade ◽  
Activity Data ◽  
Cross Sectional ◽  
Physically Active ◽  
Fifth Grade Students ◽  
Objectively Measured ◽  
Children’S Physical Activity ◽  
Objectively Measured Physical Activity

Background: The prevalence of childhood obesity is higher in economically and socially deprived areas. Higher levels of physical activity reduce the risk of excessive weight gain in youth, and research has focused on environmental factors associated with children’s physical activity, though the term “physical activity desert” has not come into wide use. Methods: This exploratory study operationalized the term “physical activity desert” and tested the hypothesis that children living in physical activity deserts would be less physically active than children who do not. A cross-sectional study design was applied with 992 fifth-grade students who had provided objectively measured physical activity data. Five of 12 possible elements of the built environment were selected as descriptors of physical activity deserts, including no commercial facilities, no parks, low play spaces, no cohesion, and the presence of incivilities. Results: Univariate and multivariate analyses showed that only the absence of parks was associated with less physical activity in children. Conclusion: Children living in a “no park” zone were less active than their counterparts who lived near a park. This study contributes preliminary conceptual and operational definitions of “physical activity desert.” Future studies of physical activity deserts should be undertaken in larger and more diverse samples.

scholarly journals Associations of Objective Physical Activity and Sedentary Behavior with Frailty in Community-dwelling Older Adults: A Mini-review

2020 ◽  
Vol 29 (1) ◽  
pp. 34-39
Author(s):  
Si Chen ◽  
Tao Chen ◽  
Shuzo Kumagai ◽  
Hyuntae Park
Keyword(s):  
Physical Activity ◽  
Sedentary Behavior ◽  
Vigorous Physical Activity ◽  
Community Dwelling ◽  
Almost All ◽  
Sedentary Bouts ◽  
Objectively Measured ◽  
Community Dwelling Older Adults ◽  
The Relationship ◽  
Objectively Measured Physical Activity

PURPOSE: This review aimed to evaluate the relationship between objectively measured physical activity and sedentary behavior and frailty in community-dwelling older adults.METHODS: An electronic search was undertaken using the MEDLINE® databases from January 1st 2010 to December 31st 2019. Titles, abstracts, and full texts of the studies identified by the search were scrutinized by the author to determine eligibility for an inclusion in this review.RESULTS: The search identified 87 relevant articles resulted, of which eight studies from four cohorts met the inclusion requirements. Almost all the studies reported a significantly negative association between moderate-to-vigorous physical activity (MVPA) and frailty, while only one was a longitudinal study. Significant associations between sedentary time (ST) and higher severity of frailty were observed, however, the findings of associations of sedentary bouts were mixed.IMPLICATION: Higher amounts of ST and lower amounts of MVPA were associated with a higher prevalence of frailty or worse frailty levels. Replacing ST with MVPA may offset the detrimental consequences of ST on frailty. More longitudinal studies and quantitative researches are needed to investigate the association of MVPA and ST bouts with frailty.

scholarly journals The Relation of Accelerometer-Measured Physical Activity and Serum Uric Acid Using the National Health and Nutrition Survey (NHANES) 2003–2004

2022 ◽  
Vol 3 ◽  
Author(s):  
Isaac D. Smith ◽  
Leanna M. Ross ◽  
Josi R. Gabaldon ◽  
Nicholas Holdgate ◽  
Carl F. Pieper ◽  
...  
Keyword(s):  
Physical Activity ◽  
Uric Acid ◽  
Serum Uric Acid ◽  
National Health ◽  
Moderate Intensity ◽  
Accelerometer Data ◽  
Health And Nutrition ◽  
Non Linear ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

Objective: Gout is a crystal-induced inflammatory arthritis caused by elevated uric acid. Physical activity has the potential to reduce serum uric acid (SUA), thus improving the disease burden of gout. In this study, we examined the association of objectively-measured physical activity and SUA.Methods: A cross-sectional study was conducted using survey, laboratory, and accelerometer data from the 2003–2004 National Health and Nutrition Examination Survey (NHANES). SUA concentrations (mg/dL) were obtained during an initial exam, and then physical activity (kCal/day) was measured with 7 days of ActiGraph accelerometry in participants (n = 3,475) representative of the ambulatory, non-institutionalized US civilian population. Regression, including restricted cubic splines, was used to assess the relation of physical activity and SUA in bivariate and adjusted models. Covariates included age, gender, race/ethnicity, alcohol use, body mass index, renal function, and urate-lowering therapy.Results: In the bivariate model, physical activity was correlated with SUA concentrations and included a non-linear component (p &lt; 0.01). In the adjusted model, linear splines were employed with a node at the SUA nadir of 5.37mg/dL; this occurred at 703 kCal/day of physical activity. The association of physical activity and SUA was negative from 0 to 703 kCal/day (p = 0.07) and positive &gt;703 kCal/day (p &lt; 0.01 for the change in slope).Conclusion: Physical activity and SUA are associated in a non-linear fashion, with a minimum estimated SUA at 703 kCal/day of objectively-measured physical activity. These findings raise intriguing questions about the use of physical activity as a potential adjunctive therapy in patients with gout, and further interventional studies are needed to elucidate the effects of moderate intensity exercise on SUA concentrations.

Objectively Measured Physical Activity in the 1993 Pelotas (Brazil) Birth Cohort

2012 ◽  
Vol 44 (12) ◽  
pp. 2369-2375 ◽  
Author(s):  
FELIPE FOSSATI REICHERT ◽  
PEDRO CURI HALLAL ◽  
JONATHAN C. K. WELLS ◽  
BERNARDO LESSA HORTA ◽  
ULF EKELUND ◽  
...  
Keyword(s):  
Physical Activity ◽  
Birth Cohort ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity
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