Autor: Groenvold, Mogens - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Development of an EORTC item bank for computer-adaptive testing of nausea and vomiting
Autorzy:: Velikova, Galina
Kemmler, Georg
Holzner, Bernhard
Püsküllüoglu, Mirosława
Young, Teresa
Groenvold, Mogens
Tomaszewska, Iwona
Petersen, Morten Aa
Opis:: Objectives: Nausea and vomiting (NV) remain common cancer symptoms and frequent side effects of anticancer therapies despite available antiemetics. They can lead to treatment disruption and discontinuation. NV is an important patient reported outcome in oncology. This study aimed to build an item bank for computer-adaptive testing (CAT) based on NV questions in the European Organisation for Research for Treatment of Cancer, Quality of Life for Cancer Patients (EORTC QLQ-C30) questionnaire and complete the first three phases of development as described in the EORTC Quality of Life Group guidelines. Data Sources: The development followed a standard procedure. The three phases include conceptualization and literature search (phase 1); item classification, selection, formulation and rating, and expert evaluations (phase 2); and patient pretesting (phase 3). The literature search resulted in a preliminary list of 115 items. Following classification, formulation, and rating, 21 candidate items adhered to the QLQ-C30 format. Evaluation by experts (n = 11) from five countries and patients (n = 31) pretesting in Denmark, Poland, and the UK lead to a final list of 20 items.Conclusion: The selection, development, and refining of NV items have been described. The nature of this testing ensures an initial CAT item bank that after field testing (phase 4) and psychometric analysis is expected to provide a precise and efficient NV measurement while still being comparable to the original QLQ-C30 scale.Implications for Nursing Practice: Access to reliable tools that facilitate NV comprehensive assessment is an important issue for nurses caring for patients with cancer. This CAT item bank is meant to support clinical decisions when all phases of testing are completed.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 2.

Tytuł:: Psychometric evaluation of an item bank for computerized adaptive testing of the EORTC QLQ-C30 cognitive functioning dimension in cancer patients
Autorzy:: Young, Teresa
Groenvold, Mogens
Dirven, Linda
Taphoorn, Martin J. B.
Conroy, Thierry
Petersen, Morten Aa.
Tomaszewski, Krzysztof
Opis:: Background The European Organisation of Research and Treatment of Cancer (EORTC) Quality of Life Group is developing computerized adaptive testing (CAT) versions of all EORTC Quality of Life Questionnaire (QLQ-C30) scales with the aim to enhance measurement precision. Here we present the results on the field-testing and psychometric evaluation of the item bank for cognitive functioning (CF). Methods In previous phases (I-III), 44 candidate items were developed measuring CF in cancer patients. In phase IV, these items were psychometrically evaluated in a large sample of international cancer patients. This evaluation included an assessment of dimensionality, fit to the item response theory (IRT) model, differential item functioning (DIF), and measurement properties. Results A total of 1030 cancer patients completed the 44 candidate items on CF. Of these, 34 items could be included in a unidimensional IRT model, showing an acceptable fit. Although several items showed DIF, these had a negligible impact on CF estimation. Measurement precision of the item bank was much higher than the two original QLQ-C30 CF items alone, across the whole continuum. Moreover, CAT measurement may on average reduce study sample sizes with about 35-40% compared to the original QLQ-C30 CF scale, without loss of power. Conclusion A CF item bank for CAT measurement consisting of 34 items was established, applicable to various cancer patients across countries. This CAT measurement system will facilitate precise and efficient assessment of HRQOL of cancer patients, without loss of comparability of results.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego