Non-response bias in physical activity trend estimates
<p>Abstract</p> <p>Background</p> <p>Increases in reported leisure time physical activity (PA) and obesity have been observed in several countries. One hypothesis for these apparently contradictory trends is differential bias in estimates over time. The purpose of this...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2009-11-01
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| Series: | BMC Public Health |
| Online Access: | http://www.biomedcentral.com/1471-2458/9/425 |