Factors Associated with Attrition in a Longitudinal Cohort of Older Adults in the Community.

ABSTRACT:

Introduction

Retaining participants in longitudinal studies increases their power. We undertook this study in a population-based longitudinal cohort of adults with COPD to determine the factors associated with increased cohort attrition.

Methods

In the longitudinal population-based Canadian Cohort of Obstructive Lung Disease (CanCOLD) study, 1561 adults > 40 years old were randomly recruited from 9 urban sites. Participants completed in-person visits at 18-month intervals and also were followed up every 3 months over the phone or by email. The cohort retention for the study and the reasons for attrition were analyzed. Hazard ratios and robust standard errors were calculated using Cox regression methods to explore the associations between participants who remained in the stud

SUBMITTER: Katsuno N 

PROVIDER: S-EPMC10392873 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature