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A Better Marker than BMI for BMD in African-American Women - Lab Report Example

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The BMC and BMD in grams per unit projected area were measured at the lumbar spine, the hip (femoral neck, greater trochanter, intertrochanter), and the whole body using Hologic QDR-2000by a specially licensed and certified technician. Fat mass and lean body mass (LBM) were determined by dual energy x-ray absorptiometry (DXA). Weight and height were measured in subjects wearing light clothing without shoes. Weight was measured in kilograms and height was measured using a stadiometer. The validated Harris-Benedict equation was used to calculate REE. A handheld grip dynamometer was used to assess grip strength. Three questions relating to frequency and intensity of exercise and participation in an organized exercise program were used to assess the physical activity of the participants. In addition each woman as asked to choose 1 of 11 statements which corresponded to PACE behavior scores, that best described her physical status. Information about cigarette smoking, post menopausal hormone therapy, diuretic use and current osteoporosis medication were also obtained using a standardized questionnaire. All the statistical analysis was performed using SPSS version 11.0. From the results it was gleaned that the mean age was 61.6 yrs and the mean age at menopause was 43.1 yr. The mean BMI was 30.1 kg/m2. The mean LBM was 44.5 kg with a range of 29.8-65.6 kg. REE values ranged from 1008 to 2112 kcal/d, with a median of 1399 kcal/d and a mean of 1422.5 kcal/d.

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Summary

African American women tend to be more overweight and to have lower resting energy expenditures (REE) compared with Caucasian women. Weight is associated with bone mineral density (BMD), but the relation between BMD and REE has not been reported. …
A Better Marker than BMI for BMD in African-American Women
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