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

Published version
Peer-reviewed

Type

Article

Change log

Authors

Martins, Rafaela Costa  ORCID logo  https://orcid.org/0000-0003-3538-7228
Silva, Bruna Gonçalves C da  ORCID logo  https://orcid.org/0000-0003-2917-7320
Ricardo, Luiza Isnardi  ORCID logo  https://orcid.org/0000-0002-1244-4501
Silva, Shana Ginar da  ORCID logo  https://orcid.org/0000-0003-1504-6936

Abstract

jats:pThe 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.</jats:p>

Description

Keywords

4206 Public Health, 42 Health Sciences, Prevention, Clinical Research, Physical Activity, Behavioral and Social Science, Cardiovascular, 2.3 Psychological, social and economic factors, 2 Aetiology, Oral and gastrointestinal, Cancer

Journal Title

Revista Brasileira de Atividade Física &amp; Saúde

Conference Name

Journal ISSN

1413-3482
2317-1634

Volume Title

26

Publisher

Brazilian Society of Physical Activity and Health