@article{51717c1ff9c549359ade05cbeb276362,
title = "Varying the item format improved the range of measurement in patient-reported outcome measures assessing physical function",
keywords = "Physical function, Patient-reported outcomes, Ceiling effects, Measurement range, Item-response theory, Item information, Response scale, Item format",
author = "Gregor Liegl and Barbara Gandek and Fischer, {H. Felix} and Bjorner, {Jakob B.} and {Ware Jr.}, {John E..} and Matthias Rose and Fries, {James F.} and Sandra Nolte",
year = "2017",
month = mar,
day = "21",
doi = "10.1186/s13075-017-1273-5",
language = "English",
volume = "19",
pages = "1--12",
journal = "Arthritis Research & Therapy",
issn = "1478-6362",
publisher = "BioMed Central",
}