Preventive medicine
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Preventive medicine · Jan 2002
Comparative StudyFactorial invariance and latent mean structure of questionnaires measuring social-cognitive determinants of physical activity among black and white adolescent girls.
We previously developed questionnaires based on contemporary theories to measure physical activity determinants among youth [Motl et al., Prev Med 2000; 31:584-94]. The present study examined the factorial invariance and latent mean structure of unidimensional models fit to the questionnaires measuring attitude, subjective norm, perceived behavioral control, and self-efficacy about physical activity among black and white adolescent girls. ⋯ The questionnaires can be employed in interventions to test the mediating influences of attitude, subjective norm, perceived behavioral control, and self-efficacy on participation in physical activity by black and white adolescent girls.
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Preventive medicine · Jan 2002
Changes in the prevalence of overweight and obesity and their risk factors in Spain, 1987-1997.
The aim of this study was to examine the relationship of the changes in the prevalence of overweight and obesity with the changes in some of their risk factors in Spain from 1987 to 1997. ⋯ The rise in the prevalence of overweight and obesity in Spain from 1987 to 1997 may have been attenuated by an increase in leisure-time physical activity and by an improvement in educational level, particularly among women. The contribution to overweight and obesity trends attributable to physical activity at work or to tobacco and alcohol consumption appears to be small or null.
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Preventive medicine · Jan 2002
No impact of repeated endoscopic screens on gastric cancer mortality in a prospectively followed Chinese population at high risk.
Gastric cancer (GC) is the leading cause of cancer deaths in China. Our study prospectively evaluated the impact of repeated endoscopic screens on GC mortality in a high-risk population in China. ⋯ Despite high population coverage with repeated screens, no reduction in GC mortality was observed in this high-risk population in China.