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Diary days needed to estimate activity among older African-American and Hispanic women. |
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PURPOSE: The purpose of this study was to estimate variation in energy expenditure among older African-American and Hispanic female workers and nonworkers, and identify the number of days of diary self-report necessary to reliably estimate activity. METHODS: 227 women (111 African-American, 116 Hispanic) from the Women On The Move study completed a 7-d diary and were used in the analysis for this study (mean age 49.3 yr, SD = 7.0; mean weight 77.0 kg, SD = 17.6 kg; mean BMI 30, SD = 6.5). Kcal per day for total activity and specific types of activity were calculated for each subject and used in generalizability analyses. RESULTS: Results indicated that 11 d of activity are needed to reliably estimate total activity for African-American nonworkers and 8 d for Hispanic nonworkers. For workers, 12 d of activity are needed to reliably estimate total activity for African-Americans and 14 d are required for Hispanics. Days of diary self-report required by activity type for African-Americans range from 6 to 48 for nonworkers and from 6 to 30 for workers. For Hispanics, days of diary self-report required by activity type range from 8 to 111 for nonworkers and 7 to 42 for workers. CONCLUSIONS: The results of this study indicate the need for more than 7 d of diary self-report to achieve reliable estimates of total activity in older African-American and Hispanic women. The study also found that certain types of activity could be reliably estimated in less than 7 d. However, when there is less variability in the measure/behavior, the reliability is expected to be less and more measurement days are needed to achieve a desired level of reliability. |
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| Type |
Journal - Bibliographic Record |
Resource Type
(If applicable)
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| Author(s) |
Eason KE, Masse LC, Kelder SH, Tortolero SR. |
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| Journal Publisher |
Med Sci Sports Exerc |
| Year |
2002 |
| Pages |
1308-1315 |
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| Edition |
V34 No.8 |
Contact Information
(If applicable)
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Comments
(If applicable)
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National Resource Center on Nutrition, Physical Activity & Aging | Florida International University, OE 200, Miami, FL 33199
Phone: 305-348-1517 | Fax: 305-348-1518 | E-mail: nutrionandaging@fiu.edu
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