PMC:4137988 / 11456-11798 JSONTXT

{"project":"2_test","denotations":[{"id":"25143747-19845575-55576495","span":{"begin":162,"end":164},"obj":"19845575"},{"id":"25143747-23057785-55576496","span":{"begin":165,"end":167},"obj":"23057785"},{"id":"25143747-19995472-55576496","span":{"begin":165,"end":167},"obj":"19995472"},{"id":"25143747-20075056-55576496","span":{"begin":165,"end":167},"obj":"20075056"},{"id":"25143747-20554789-55576497","span":{"begin":171,"end":173},"obj":"20554789"},{"id":"25143747-18829673-55576497","span":{"begin":171,"end":173},"obj":"18829673"},{"id":"25143747-17684223-55576497","span":{"begin":171,"end":173},"obj":"17684223"},{"id":"25143747-17504819-55576497","span":{"begin":171,"end":173},"obj":"17504819"},{"id":"25143747-16239624-55576497","span":{"begin":171,"end":173},"obj":"16239624"},{"id":"25143747-23240044-55576497","span":{"begin":171,"end":173},"obj":"23240044"},{"id":"25143747-23157561-55576498","span":{"begin":281,"end":283},"obj":"23157561"},{"id":"25143747-18588559-55576499","span":{"begin":284,"end":286},"obj":"18588559"}],"text":"All studies used food frequency questionnaires (FFQs) to measure dietary intakes, with the number of food items or groups ranging from 12 to over 200. Ten studies20,22–24,26–31 derived at least two dietary patterns a posteriori using PCA (n=9) or factor analysis (n=1). Two studies21,25 calculated a Mediterranean diet score defined a priori."}