Item response theory analysis of the patient satisfaction with cancer-related care measure: a psychometric investigation in a multicultural sample of 1,296 participants.
Background We developed and validated a Patient Satisfaction with Cancer-Related Care (PSCC) measure using classical test theory methods. The present study applied item response theory (IRT) analysis to determine item-level psychometric properties, facilitate development of short forms, and inform f...
| Published in: | Supportive Care in Cancer Vol. 22; no. 8; pp. 2229 - 2241 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Published: |
Springer Nature
Aug2014
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=127707736&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 127707736 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09414355 O1J jtl: Supportive Care in Cancer issn: 09414355 maglogo: N pubinfo: dt: Aug2014 vid: 22 iid: 8 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 127707736 127707736 10.1007/s00520-014-2202-7 127707736 ppf: 2229 ppct: 12 formats: fmt: @attributes: type: P tig: atl: Item response theory analysis of the patient satisfaction with cancer-related care measure: a psychometric investigation in a multicultural sample of 1,296 participants. aug: au: Jean-Pierre, Pascal Cheng, Ying Paskett, Electra Shao, Can Fiscella, Kevin Winters, Paul affil: Department of Psychology, Neurocognitive Translational Research Lab, Cancer Control & Survivorship Program, University of Notre Dame, 109 Haggar Hall, Notre Dame, IN 46556, USA sug: ab: Background We developed and validated a Patient Satisfaction with Cancer-Related Care (PSCC) measure using classical test theory methods. The present study applied item response theory (IRT) analysis to determine item-level psychometric properties, facilitate development of short forms, and inform future applications for the PSCC. Methods We applied unidimensional IRT models to PSCC data from 1,296 participants (73 % female; 18 to 86 years). An unconstrained graded response model (GRM) and a Rasch Model were fitted to estimate indices for model comparison using likelihood ratio (LR) test and information criteria. We computed item and latent trait parameter estimates, category and operating characteristic curves, and tested information curves for the better fitting model. Results The GRM fitted the data better than the Rasch Model (LR=828, df=17, p<0.001). The log-likelihood (−17,390.38 vs. −17,804.26) was larger, and the AIC and BIC were smaller for the GRM compared to the Rash Model (AIC=34,960.77 vs. 35,754.73; BIC=35,425.80 vs. 36,131.92). Item parameter estimates (IPEs) showed substantial variation in items’ discriminating power (0.94 to 2.18). Standard errors of the IPEs were small (threshold parameters mostly around 0.1; discrimination parameters 0.1 to 0.2), confirming the precision of the IPEs. Conclusion The GRM provides precise IPEs that will enable comparable scores from different subsets of items, and facilitate optimal selections of items to estimate patients’ latent satisfaction level. Given the large calibration sample, the IPEs can be used in settings with limited resources (e.g., smaller samples) to estimate patients’ satisfaction. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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