Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil
ABSTRACT OBJECTIVE To compare two methodological approaches: the multinomial model and the zero-inflated gamma model, evaluating the factors associated with the practice and amount of time spent on leisure time physical activity. METHODS Data collected from 14,823 baseline participants in the Longitudinal Study of Adult Health (ELSA-Brasil – Estudo Longitudinal de Saúde do Adulto ) have been analysed. Regular leisure time physical activity has been measured using the leisure time physical activity module of the International Physical Activity Questionnaire. The explanatory variables considered were gender, age, education level, and annual per capita family income. RESULTS The main advantage of the zero-inflated gamma model over the multinomial model is that it estimates mean time (minutes per week) spent on leisure time physical activity. For example, on average, men spent 28 minutes/week longer on leisure time physical activity than women did. The most sedentary groups were young women with low education level and income CONCLUSIONS The zero-inflated gamma model, which is rarely used in epidemiological studies, can give more appropriate answers in several situations. In our case, we have obtained important information on the main determinants of the duration of leisure time physical activity. This information can help guide efforts towards the most vulnerable groups since physical inactivity is associated with different diseases and even premature death.
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Faculdade de Saúde Pública da Universidade de São Paulo
2017
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oai:scielo:S0034-891020170001002662017-08-15Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-BrasilNobre,Aline AraújoCarvalho,Marilia SáGriep,Rosane HärterFonseca,Maria de Jesus Mendes daMelo,Enirtes Caetano PratesSantos,Itamar de SouzaChor,Dora Motor Activity Leisure Activities Regression Analysis Models, Statistical ABSTRACT OBJECTIVE To compare two methodological approaches: the multinomial model and the zero-inflated gamma model, evaluating the factors associated with the practice and amount of time spent on leisure time physical activity. METHODS Data collected from 14,823 baseline participants in the Longitudinal Study of Adult Health (ELSA-Brasil – Estudo Longitudinal de Saúde do Adulto ) have been analysed. Regular leisure time physical activity has been measured using the leisure time physical activity module of the International Physical Activity Questionnaire. The explanatory variables considered were gender, age, education level, and annual per capita family income. RESULTS The main advantage of the zero-inflated gamma model over the multinomial model is that it estimates mean time (minutes per week) spent on leisure time physical activity. For example, on average, men spent 28 minutes/week longer on leisure time physical activity than women did. The most sedentary groups were young women with low education level and income CONCLUSIONS The zero-inflated gamma model, which is rarely used in epidemiological studies, can give more appropriate answers in several situations. In our case, we have obtained important information on the main determinants of the duration of leisure time physical activity. This information can help guide efforts towards the most vulnerable groups since physical inactivity is associated with different diseases and even premature death.info:eu-repo/semantics/openAccessFaculdade de Saúde Pública da Universidade de São PauloRevista de Saúde Pública v.51 20172017-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-89102017000100266en10.11606/s1518-8787.2017051006882 |
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Nobre,Aline Araújo Carvalho,Marilia Sá Griep,Rosane Härter Fonseca,Maria de Jesus Mendes da Melo,Enirtes Caetano Prates Santos,Itamar de Souza Chor,Dora |
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Nobre,Aline Araújo Carvalho,Marilia Sá Griep,Rosane Härter Fonseca,Maria de Jesus Mendes da Melo,Enirtes Caetano Prates Santos,Itamar de Souza Chor,Dora Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil |
author_facet |
Nobre,Aline Araújo Carvalho,Marilia Sá Griep,Rosane Härter Fonseca,Maria de Jesus Mendes da Melo,Enirtes Caetano Prates Santos,Itamar de Souza Chor,Dora |
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Nobre,Aline Araújo |
title |
Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil |
title_short |
Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil |
title_full |
Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil |
title_fullStr |
Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil |
title_full_unstemmed |
Multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of ELSA-Brasil |
title_sort |
multinomial model and zero-inflated gamma model to study time spent on leisure time physical activity: an example of elsa-brasil |
description |
ABSTRACT OBJECTIVE To compare two methodological approaches: the multinomial model and the zero-inflated gamma model, evaluating the factors associated with the practice and amount of time spent on leisure time physical activity. METHODS Data collected from 14,823 baseline participants in the Longitudinal Study of Adult Health (ELSA-Brasil – Estudo Longitudinal de Saúde do Adulto ) have been analysed. Regular leisure time physical activity has been measured using the leisure time physical activity module of the International Physical Activity Questionnaire. The explanatory variables considered were gender, age, education level, and annual per capita family income. RESULTS The main advantage of the zero-inflated gamma model over the multinomial model is that it estimates mean time (minutes per week) spent on leisure time physical activity. For example, on average, men spent 28 minutes/week longer on leisure time physical activity than women did. The most sedentary groups were young women with low education level and income CONCLUSIONS The zero-inflated gamma model, which is rarely used in epidemiological studies, can give more appropriate answers in several situations. In our case, we have obtained important information on the main determinants of the duration of leisure time physical activity. This information can help guide efforts towards the most vulnerable groups since physical inactivity is associated with different diseases and even premature death. |
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Faculdade de Saúde Pública da Universidade de São Paulo |
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2017 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-89102017000100266 |
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