Racial, Ethnic, and Nativity Disparities in Physical Activity and Sedentary Time among Cancer Prevention Study-3 Participants.

Purpose: Understanding racial/ethnic and nativity disparities in physical activity (PA) is important, as certain subgroups bear a disproportionate burden of physical inactivity-related diseases. This descriptive study compared mean leisure-time moderate-to-vigorous intensity physical activity (LTMVPA) by race/ethnicity and nativity.

Methods: The Cancer Prevention Study-3 (78.

Prospective changes in physical activity, sedentary time and sleep during the COVID-19 pandemic in a US-based cohort study.

Objectives: Assess differences in movement behaviours within the 24-hour cycle, including light intensity physical activity (LPA), moderate-to-vigorous physical activity (MVPA), sedentary time and sleep, before and during the COVID-19 pandemic and assess these differences stratified by several relevant factors in a subcohort of the Cancer Prevention Study-3.

Design And Setting: US-based longitudinal cohort study (2018-August 2020).

Participants: N=1992 participants, of which 1304 (65.

A method for remotely measuring physical function in large epidemiologic cohorts: Feasibility and validity of a video-guided sit-to-stand test.

Introduction: Traditional measures of muscular strength require in-person visits, making administration in large epidemiologic cohorts difficult. This has left gaps in the literature regarding relationships between strength and long-term health outcomes. The aim of this study was to test the feasibility and validity of a video-led, self-administered 30-second sit-to-stand (STS) test in a sub-cohort of the U.

Survey Item Response Rates by Survey Modality, Language, and Sociodemographic Factors in a Large U.S. Cohort.

Background: Large-scale prospective cohorts traditionally use English, paper-based, mailed surveys, but Web-based surveys can lower costs and increase data quality, and multi-language surveys may aid in capturing diverse populations. Little evidence exists examining item response for multiple survey modalities or languages in epidemiologic cohorts.

Methods: A total of 254,475 men and women completed a comprehensive lifestyle and medical survey at enrollment (2006-2013) for the Cancer Prevention Study-3, a U.

The American Cancer Society's Cancer Prevention Study 3 (CPS-3): Recruitment, study design, and baseline characteristics.

Background: Prospective cohort studies contribute importantly to understanding the role of lifestyle, genetic, and other factors in chronic disease etiology.

Methods: The American Cancer Society (ACS) recruited a new prospective cohort study, Cancer Prevention Study 3 (CPS-3), between 2006 and 2013 from 35 states and Puerto Rico. Enrollment took place primarily at ACS community events and at community enrollment "drives.