TY - JOUR
T1 - Is the MEDFICTS Rapid Dietary Fat Screener Valid for Premenopausal African-American Women?
AU - Teal, Cayla R.
AU - Baham, Danielle L.
AU - Gor, Beverly J.
AU - Jones, Lovell A.
N1 - Funding Information:
This research was supported by a grant from the American Cancer Society to the Center for Research on Minority Health, University of Texas M. D. Anderson Cancer Center (L. A. J., principal investigator; grant no. TURSG-01-247-01-PBP). B. J. G.’s efforts were also supported by the National Center for Minority Health and Health Disparities (grant no. P60 MD000503-02) and the Centers for Disease Control and Prevention (grant no. U48 CCU619515). C. R. T.’s efforts were supported by the Department of Veterans Affairs and the Centers for Disease Control and Prevention (grant no. K01# DP-000090).
PY - 2007/5
Y1 - 2007/5
N2 - Objective: To assess the predictive validity of the meats, eggs, dairy, fried foods, fat in baked goods, convenience foods, fats added at the table, and snacks (MEDFICTS) questionnaire, a rapid dietary fat screening instrument, when used with African-American women. Design: A case series design was utilized to assess the validity of MEDFICTS compared to the Arizona Food Frequency Questionnaire. Subjects/setting: Data for this study were collected from 184 healthy premenopausal African-American women who completed both the MEDFICTS and the Arizona Food Frequency Questionnaire during screening for eligibility in a nutrition intervention study. Statistical analyses performed: Analyses of sensitivity, specificity, predictive values, and receiver operating characteristic analysis were used to examine the predictive validity of MEDFICTS. Covariates of correctly and incorrectly identified groups were examined with contingency table analysis and t tests. Results: MEDFICTS was a statistically significant predictor of dietary fat consumption, but underestimated fat consumption of ≥30%. MEDFICTS' sensitivity to detect those consuming ≥30% fat was 57.3%, whereas its specificity (detection of those consuming <30% dietary fat) was 66.0%. Positive and negative predictive values were 80.6% and 38.5%, respectively. A reduction in the threshold score resulted in increased sensitivity but decreased specificity. Women identified by MEDFICTS as consuming <30% dietary fat but who were actually consuming 30% or more reported greater consumption of fats from foods classified as mixed foods. Conclusions: Study findings suggest MEDFICTS underestimates fat consumption of ≥30%. The inclusion of a category to assess mixed foods could improve the sensitivity and specificity of MEDFICTS for predicting dietary fat consumption. These results demonstrate the need for population-based validation of dietary screening instruments.
AB - Objective: To assess the predictive validity of the meats, eggs, dairy, fried foods, fat in baked goods, convenience foods, fats added at the table, and snacks (MEDFICTS) questionnaire, a rapid dietary fat screening instrument, when used with African-American women. Design: A case series design was utilized to assess the validity of MEDFICTS compared to the Arizona Food Frequency Questionnaire. Subjects/setting: Data for this study were collected from 184 healthy premenopausal African-American women who completed both the MEDFICTS and the Arizona Food Frequency Questionnaire during screening for eligibility in a nutrition intervention study. Statistical analyses performed: Analyses of sensitivity, specificity, predictive values, and receiver operating characteristic analysis were used to examine the predictive validity of MEDFICTS. Covariates of correctly and incorrectly identified groups were examined with contingency table analysis and t tests. Results: MEDFICTS was a statistically significant predictor of dietary fat consumption, but underestimated fat consumption of ≥30%. MEDFICTS' sensitivity to detect those consuming ≥30% fat was 57.3%, whereas its specificity (detection of those consuming <30% dietary fat) was 66.0%. Positive and negative predictive values were 80.6% and 38.5%, respectively. A reduction in the threshold score resulted in increased sensitivity but decreased specificity. Women identified by MEDFICTS as consuming <30% dietary fat but who were actually consuming 30% or more reported greater consumption of fats from foods classified as mixed foods. Conclusions: Study findings suggest MEDFICTS underestimates fat consumption of ≥30%. The inclusion of a category to assess mixed foods could improve the sensitivity and specificity of MEDFICTS for predicting dietary fat consumption. These results demonstrate the need for population-based validation of dietary screening instruments.
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U2 - 10.1016/j.jada.2007.02.005
DO - 10.1016/j.jada.2007.02.005
M3 - Article
C2 - 17467372
AN - SCOPUS:34247397858
SN - 0002-8223
VL - 107
SP - 773
EP - 781
JO - Journal of the American Dietetic Association
JF - Journal of the American Dietetic Association
IS - 5
ER -