In old age, sufficient protein intake is important to preserve muscle mass and function. Around 50% of older adults (65+ y) consumes \u22641.0 g\/kg adjusted body weight (BW)\/day (d). There is no rapid method available to screen for low protein intake in old age. Therefore, we aimed to develop and validate a short food questionnaire to screen for low protein intake in community-dwelling older adults. We used data of 1348 older men and women (56-101 y) of the LASA study (the Netherlands) to develop the questionnaire and data of 563 older men and women (55-71 y) of the HELIUS study (the Netherlands) for external validation. In both samples, protein intake was measured by the 238-item semi-quantitative HELIUS food frequency questionnaire (FFQ). Multivariable logistic regression analysis was used to predict protein intake \u22641.0 g\/kg adjusted BW\/d (based on the HELIUS FFQ). Candidate predictor variables were FFQ questions on frequency and amount of intake of specific foods. In both samples, 30% had a protein intake \u22641.0 g\/kg adjusted BW\/d. Our final model included adjusted body weight and 10 questions on the consumption (amount on average day or frequency in 4 weeks) of: slices of bread (number); glasses of milk (number); meat with warm meal (portion size); cheese (amount and frequency); dairy products (like yoghurt) (frequency); egg(s) (frequency); pasta\/noodles (frequency); fish (frequency); and nuts\/peanuts (frequency). The area under the receiver operating characteristic curve (AUC) was 0.889 (95% CI 0.870-0.907). The calibration slope was 1.03 (optimal slope 1.00). At a cut-off of \u22640.8 g\/kg adjusted BW\/d, the AUC was 0.916 (96% CI 0.897-0.936). Applying the regression equation to the HELIUS sample, the AUC was 0.856 (95% CI 0.824-0.888) and the calibration slope 0.92. Regression coefficients were therefore subsequently shrunken by a linear factor 0.92. To conclude, the short food questionnaire (Pro55+) can be used to validly screen for protein intake \u22641.0 g\/kg adjusted BW\/d in community-dwelling older adults. An online version can be found at www.proteinscreener.nl. External validation in other countries is recommended.<\/p>\n","protected":false},"excerpt":{"rendered":"
In old age, sufficient protein intake is important to preserve muscle mass and function. Around 50% of older adults (65+ y) consumes \u22641.0 g\/kg adjusted body weight (BW)\/day (d). There is no rapid method available to screen for low protein intake in old age. Therefore, we aimed to develop and validate a short food questionnaire […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":true},"publications_year":[34],"thema":[45],"class_list":["post-1252","publicatie","type-publicatie","status-publish","hentry","publications_year-34","thema-other"],"acf":[],"_links":{"self":[{"href":"https:\/\/heliusstudy.nl\/tr\/wp-json\/wp\/v2\/publicatie\/1252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heliusstudy.nl\/tr\/wp-json\/wp\/v2\/publicatie"}],"about":[{"href":"https:\/\/heliusstudy.nl\/tr\/wp-json\/wp\/v2\/types\/publicatie"}],"wp:attachment":[{"href":"https:\/\/heliusstudy.nl\/tr\/wp-json\/wp\/v2\/media?parent=1252"}],"wp:term":[{"taxonomy":"publications_year","embeddable":true,"href":"https:\/\/heliusstudy.nl\/tr\/wp-json\/wp\/v2\/publications_year?post=1252"},{"taxonomy":"thema","embeddable":true,"href":"https:\/\/heliusstudy.nl\/tr\/wp-json\/wp\/v2\/thema?post=1252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}