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Physical activity and osteopenia amo...

Ashford-Carroll, Tami Suree.

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Physical activity and osteopenia among older women.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Physical activity and osteopenia among older women./
Author:	Ashford-Carroll, Tami Suree.
Description:	100 p.
Notes:	Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2337.
Contained By:	Dissertation Abstracts International63-05B.
Subject:	Health Sciences, Public Health. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3052013
ISBN:	0493663223

Physical activity and osteopenia among older women.
Ashford-Carroll, Tami Suree.

Physical activity and osteopenia among older women. - 100 p.

Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2337.

Thesis (Ph.D.)--University of South Carolina, 2002.

This study used cross-sectional, population-based data from NHANES III, 1988--94, to investigate the dose of all leisure-time physical activities combined as a risk factor in the development of osteopenia among 1,753 women 50 to 69 years of age (a surrogate for menopausal status). Femoral neck bone mineral density of each women was measured by dual-energy X-ray absorptiometry (Hologic QDR 1000). Three physical activity variables were created: physical activity bone loading impact (high, low, sedentary), overall physical activity MET-frequency (METs times events/month), and overall physical activity frequency (events/month). There were no statistically significant associations between impact and MET-frequency and osteopenia. Smoking was an effect modifier of the frequency association. Among smokers, there was a negative association between high frequency and osteopenia (OR = 0.42; 95% CI: 0.18, 0.99). Dietary calcium and estrogen were individually assessed as effect modifiers for each physical activity variable and osteopenia. Estrogen use failed to modify any of the associations. Although the dietary calcium interaction was nonsignificant, there was a protective association between high impact physical activity and osteopenia among women who consumed between 451 to 799 mg per day of dietary calcium (OR = 0.11; 95% CI: 0.02, 0.53). However, sample sizes for women performing high impact physical activity with 451--799 mg/day of dietary calcium is low (n = 20). There were no statistically significant associations for MET-frequency and frequency with osteopenia at either level of dietary calcium. Information on menopause can aid in addressing the physical activity and bone mass association and further elucidate the role of estrogen and dietary calcium.

ISBN: 0493663223Subjects--Topical Terms:

1017659
Health Sciences, Public Health.

Physical activity and osteopenia among older women.
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500 $a Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2337.
500 $a Major Professor: Shirley J. Thompson.
502 $a Thesis (Ph.D.)--University of South Carolina, 2002.
520 $a This study used cross-sectional, population-based data from NHANES III, 1988--94, to investigate the dose of all leisure-time physical activities combined as a risk factor in the development of osteopenia among 1,753 women 50 to 69 years of age (a surrogate for menopausal status). Femoral neck bone mineral density of each women was measured by dual-energy X-ray absorptiometry (Hologic QDR 1000). Three physical activity variables were created: physical activity bone loading impact (high, low, sedentary), overall physical activity MET-frequency (METs times events/month), and overall physical activity frequency (events/month). There were no statistically significant associations between impact and MET-frequency and osteopenia. Smoking was an effect modifier of the frequency association. Among smokers, there was a negative association between high frequency and osteopenia (OR = 0.42; 95% CI: 0.18, 0.99). Dietary calcium and estrogen were individually assessed as effect modifiers for each physical activity variable and osteopenia. Estrogen use failed to modify any of the associations. Although the dietary calcium interaction was nonsignificant, there was a protective association between high impact physical activity and osteopenia among women who consumed between 451 to 799 mg per day of dietary calcium (OR = 0.11; 95% CI: 0.02, 0.53). However, sample sizes for women performing high impact physical activity with 451--799 mg/day of dietary calcium is low (n = 20). There were no statistically significant associations for MET-frequency and frequency with osteopenia at either level of dietary calcium. Information on menopause can aid in addressing the physical activity and bone mass association and further elucidate the role of estrogen and dietary calcium.
590 $a School code: 0202.
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650 4 $a Gerontology. $3 533633
650 4 $a Health Sciences, Nutrition. $3 1017801
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