{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T21:23:49Z","timestamp":1789507429223,"version":"build-2803163510"},"reference-count":28,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2003,4,29]],"date-time":"2003-04-29T00:00:00Z","timestamp":1051574400000},"content-version":"unspecified","delay-in-days":59,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pall Supp Care"],"published-print":{"date-parts":[[2003,3]]},"abstract":"<jats:p><jats:italic>Objective:<\/jats:italic> This study evaluated the comparability of two \n5-point symptom self-report rating scales: Intensity (from \u201cnot \nat all\u201d to \u201cvery much\u201d) and Frequency (from \n\u201cnone of the time\u201d to \u201call of the time\u201d). \nQuestions from the Functional Assessment of Chronic Illness Therapy \n(FACIT)-Fatigue 13-item scale was examined.<\/jats:p><jats:p><jats:italic>Methods:<\/jats:italic> Data from 161 patients (60 cancer, 51 stroke, 50 HIV) \nwere calibrated separately to fit an item response theory-based rating scale \nmodel (RSM). The RSM specifies intersection parameters (step thresholds) \nbetween two adjacent response categories and the item location \nparameter that reflects the probability that a problem will be \nendorsed. Along with patient fatigue scores (\u201cmeasures\u201d), \nthe spread of the step thresholds and between-threshold ranges were \nexamined. The item locations were also examined for differential item \nfunctioning.<\/jats:p><jats:p><jats:italic>Results:<\/jats:italic> There was no mean raw score difference between intensity \nand frequency rating scales (37.2 vs. 36.4, <jats:italic>p<\/jats:italic> = n.s.). The high \ncorrelation (<jats:italic>r<\/jats:italic> = .86, <jats:italic>p<\/jats:italic> &lt; .001) between the intensity \nversus frequency scores indicated their essential equivalence. However, \nfrequency step thresholds covered more of the fatigue measurement continuum \nand were more equidistant, and therefore reduced floor and ceiling \neffects.<\/jats:p><jats:p><jats:italic>Significance of results:<\/jats:italic> These two scaling methods \nproduce essentially equivalent fatigue estimates; it is difficult to \njustify assessing both. The frequency response scaling may be \npreferable in that it provides fuller coverage of the fatigue \ncontinuum, including slightly better differentiation of people with \nrelatively little fatigue, and a small group of the most fatigued \npatients. Intensity response scaling offers slightly more precision \namong the patients with significant fatigue.<\/jats:p>","DOI":"10.1017\/s1478951503030049","type":"journal-article","created":{"date-parts":[[2003,11,3]],"date-time":"2003-11-03T17:28:33Z","timestamp":1067880513000},"page":"51-60","source":"Crossref","is-referenced-by-count":35,"title":["Should symptoms be scaled for intensity, frequency, or both?"],"prefix":"10.1017","volume":"1","author":[{"given":"CHIH-HUNG","family":"CHANG","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"DAVID","family":"CELLA","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"SUSAN","family":"CLARKE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ALLEN W.","family":"HEINEMANN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"JAMIE H.","family":"VON ROENN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"RICHARD","family":"HARVEY","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2003,4,29]]},"reference":[{"key":"S1478951503030049_ref026","unstructured":"Vogelzang, N.J. , Breitbart, W. , Cella, D. , Curt, G.A. , Groopman, J.E. , Horning, S.J. , Itri, L.M. , Johnson, D.H. , Scherr, S.L. , & Portenoy, R.K. (1997).Patient, caregiver, and oncologist perceptions of cancer-relatedfatigue: Results of a tripart assessment survey; The FatigueCoalition.Seminars in Hematology,34,4\u201312."},{"key":"S1478951503030049_ref010","doi-asserted-by":"crossref","unstructured":"Hann, D.M. , Jacobsen, P.B. , Azzarello, L.M. , Martin, S.C. , Curran, S.L. , Fields, K.K. , Greenberg, H. , & Lyman, G. (1998).Measurement of fatigue in cancer patients: Development andvalidation of the Fatigue Symptom Inventory.Quality of Life Research,7,301\u2013310.","DOI":"10.1023\/A:1008842517972"},{"key":"S1478951503030049_ref027","unstructured":"Wright, B.D. & Stone, M.H. (1979).Best Test Design.Chicago:MESA Press."},{"key":"S1478951503030049_ref019","unstructured":"Piper, B.F. , Dibble, S.L. , Dodd, M.J. , Weiss, M.C. , Slaughter, R.E. , & Paul, S.M. 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(1978b).Scaling attitude items constructed and scored in the Likerttradition.Educational and Psychological Measurement,38,665\u2013680.","DOI":"10.1177\/001316447803800308"}],"container-title":["Palliative and Supportive Care"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S1478951503030049","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,4,3]],"date-time":"2019-04-03T20:25:35Z","timestamp":1554323135000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S1478951503030049\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2003,3]]},"references-count":28,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2003,3]]}},"alternative-id":["S1478951503030049"],"URL":"https:\/\/doi.org\/10.1017\/s1478951503030049","relation":{},"ISSN":["1478-9515","1478-9523"],"issn-type":[{"value":"1478-9515","type":"print"},{"value":"1478-9523","type":"electronic"}],"subject":[],"published":{"date-parts":[[2003,3]]}}}