Dataset Information

Predictors of non-response in a UK-wide cohort study of children's accelerometer-determined physical activity using postal methods.

ABSTRACT:

Objectives

To investigate the biological, social, behavioural and environmental factors associated with non-consent, and non-return of reliable accelerometer data (?2 days lasting ?10 h/day), in a UK-wide postal study of children's activity.

Design

Nationally representative prospective cohort study.

Setting

Children born across the UK, between 2000 and 2002.

Participants

13 681 7 to 8-year-old singleton children who were invited to wear an accelerometer on their right hip for 7 consecutive days. Consenting families were posted an Actigraph GT1M accelerometer and asked to return it by post.

Primary outcome measures

Study consent and reliable accelerometer data acquisition.

Results

Consent was obtained for 12 872 (94.5%) interviewed singletons, of whom 6497 (50.5%) returned reliable accelerometer data. Consent was less likely for children with a limiting illness or disability, children who did not have people smoking near them, children who had access to a garden, and those who lived in Northern Ireland. From those who consented, reliable accelerometer data were less likely to be acquired from children who: were boys; overweight/obese; of white, mixed or 'other' ethnicity; had an illness or disability limiting daily activity; whose mothers did not have a degree; who lived in rented accommodation; who exercised once a week or less; who had been breastfed; were from disadvantaged wards; had younger mothers or lone mothers; or were from households with just one, or more than three children.

Conclusions

Studies need to encourage consent and reliable data return in the wide range of groups we have identified to improve response and reduce non-response bias. Additional efforts targeted at such children should increase study consent and data acquisition while also reducing non-response bias. Adjustment must be made for missing data that account for missing data as a non-random event.

SUBMITTER: Rich C

PROVIDER: S-EPMC3612744 | biostudies-literature | 2013 Mar

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Predictors of non-response in a UK-wide cohort study of children's accelerometer-determined physical activity using postal methods.

Rich Carly C Cortina-Borja Mario M Dezateux Carol C Geraci Marco M Sera Francesco F Calderwood Lisa L Joshi Heather H Griffiths Lucy J LJ

BMJ open 20130301 3

<h4>Objectives</h4>To investigate the biological, social, behavioural and environmental factors associated with non-consent, and non-return of reliable accelerometer data (≥2 days lasting ≥10 h/day), in a UK-wide postal study of children's activity.<h4>Design</h4>Nationally representative prospective cohort study.<h4>Setting</h4>Children born across the UK, between 2000 and 2002.<h4>Participants</h4>13 681 7 to 8-year-old singleton children who were invited to wear an accelerometer on their righ ...[more]

PMID: 23457328

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Project description:BackgroundPrevious studies on physical activity (PA) and pelvic organ prolapse (POP) were largely limited to self-reported PA in athletes, soldiers, and women in postpartum. We aimed to investigate the association of accelerometer-measured PA and sedentary behavior with the risk of POP in middle-aged and elderly women.MethodsIn this prospective cohort derived from the UK Biobank, the intensity and duration of PA and sedentary behavior were measured with wrist-worn accelerometers over a 7-day period in 2013-2015 for 47,674 participants (aged 42.8-77.9 years) without pre-existing POP. Participants were followed up until the end of 2022, during which incident POP was ascertained mainly by the electronic health records. Multivariable-adjusted Cox proportional hazards models and restricted cubic splines were used to assess the associations of interest. Isotemporal substitution models were applied to test the effects of substituting a type of activity with equivalent duration of others.ResultsDuring a median follow-up of 8.0 years, 779 cases of POP were recorded. The duration of light-intensity PA (LPA) was positively whereas sedentary time was negatively associated with the risk of POP. Every additional 1 h/day of LPA elevated the risk of POP by 18% (95% confidence interval [CI], 10%-26%). In contrast, the risk decreased by 5% (95% CI, 0-8%) per 1 h/day increment in sedentary behavior. No associations were found between moderate-intensity PA (MPA) or vigorous-intensity PA (VPA) and POP, except that women who had a history of hysterectomy were more likely to develop POP when performing more VPA (53% higher risk for every additional 15 min/day). Substituting 1 h/day of LPA with equivalent sedentary time was associated with a 18% (95% CI, 11%-24%) lower risk of POP. The risk can also be reduced by 17% (95% CI, 7%-25%) through substituting 30 min/day of LPA with MPA.ConclusionsMore time spent in LPA or less sedentary time was linked to an elevated risk of POP in middle-aged and elderly women, while MPA or VPA was not. Substituting LPA with equivalent duration of sedentary behavior or MPA may lower the risk of POP.

Dataset Information

Predictors of non-response in a UK-wide cohort study of children's accelerometer-determined physical activity using postal methods.

Objectives

Design

Setting

Participants

Primary outcome measures

Results

Conclusions

Publications

Predictors of non-response in a UK-wide cohort study of children's accelerometer-determined physical activity using postal methods.

Similar Datasets

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