The relationship of physical activity and cigarette smoking to lumbar spine and femoral neck bone mineral density in Canadian men
Date
2002-10
Authors
Journal Title
Journal ISSN
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Publisher
ORCID
Type
Degree Level
Masters
Abstract
The relationship of physical activity energy expenditure (PAEE) and cigarette
smoking consumption (CSC) to lumbar spine (LS) and femoral neck (FN) bone mineral
density (BMD, g/cm2) was investigated in 2565 Canadian men (aged 25-96 years) from
the Canadian Multicentre Osteoporosis Study (CaMOS). BMD was assessed using dual
energy x-ray absorptiometry. Physical activity and cigarette smoking were assessed by
interviewer-administered questionnaire. Physical activity was split into 3 categories and
the total time (hours/week) for each category was multiplied by a corresponding
anticipated multiple of resting energy expenditure or MET value to derive an overall
estimate of average weekly energy expenditure (MET-hr/wk or kcal/kg/wk). The MET
values used for each physical activity category were as follows: 9 METs for strenuous
sports, 5 METs for vigorous work, and 3 METs for moderate activity. Cigarette
smoking was dichotomized into smokers (defined as men who had ever smoked daily
for 6 months or more) and non-smokers (defined as men who had never smoked daily
for at least 6 months). Separate hierarchical multiple regression analyses were
performed for LS and FN BMD entering age, height, and weight as covariates on the
ftrst step. The analyses revealed that the covariates accounted for 9.3% (p
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Citation
Degree
Master of Science (M.Sc.)
Department
College of Kinesiology
Program
College of Kinesiology