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Evaluation of a Brief Calcium Assessment Tool (BCAT) for adolescents
Author(s) -
Yang Yoonjung,
Boushey Carol J
Publication year - 2007
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.21.5.a684-d
Subject(s) - quartile , medicine , calcium , demography , dentistry , sociology , confidence interval
The purpose of this study was to evaluate a Brief Calcium Assessment Tool (BCAT) for screening calcium intakes among adolescents. Data from 745 females ages 11–12 yr in 6 states and 1,426 Asian, Hispanic, and non‐Hispanic White youth (ages 11–12 and 16–17 yr) in 10 states were used to select the 15 foods from the 79 foods in the What You Eat and Drink (WYED) food frequency questionnaire ( J Am Diet Assoc . 2004; 104 , –769). The selected foods explained 92% of the total variance of calcium intake. Reliability was assessed by repeated BCAT administrations 1 week apart among 41 adolescents ages 9 to 17 yr. Correlation of BCAT scores between first and second administration was 0.76 (p<0.001). Relative validity was evaluated by comparing the BCAT to the Block Kids 2004 Questionnaire (BKQ) as completed by 176 adolescents ages 10 to 13 yr. Correlation between BCAT scores and calcium estimates as estimated by the BKQ was 0.35 (p<0.001) and cross‐classification analysis placed 80% of the subjects in the same or adjacent quartiles. Multivariate models examined bone mineral content (BMC) from DXA measurements (Lunar Prodigy) and BCAT scores among 748 females (11–12 yr). BCAT was associated with total hip BMC while adjusting for growth and maturity, B=0.007, t=2.76, p=0.006. The BCAT appears to perform well to estimate calcium intake among adolescents, thus the tool can be used to screen calcium intakes among adolescents.