Description:
<jats:title>Abstract</jats:title>
<jats:sec id="S1478951521001176_sec_a1">
<jats:title>Objective</jats:title>
<jats:p>The study aimed to assess the reliability and validity of the IPOS-Pol for patient self-reporting.</jats:p>
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<jats:sec id="S1478951521001176_sec_a2" sec-type="methods">
<jats:title>Method</jats:title>
<jats:p>Patients (>18 years of age) with advanced cancer admitted to three palliative care centers (inpatient units and home-based) were recruited to a multicenter, cross-sectional, observational, prospective study. Participants provided responses to the IPOS-Pol Patient version and the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire – Core 15 – Palliative Care (EORTC QLQ-C15-PAL) Polish version at baseline (T1) and four to seven days later (T2). We assessed test–retest reliability, internal consistency, and construct validity of the tool.</jats:p>
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<jats:sec id="S1478951521001176_sec_a3" sec-type="results">
<jats:title>Results</jats:title>
<jats:p>One hundred and eighty patients were included. Test–retest reliability demonstrated no statistically significant differences in the average outcomes of the IPOS-Pol between T1 and T2 (27.2 ± 9.2 vs. 26.5 ± 8.7; <jats:italic>p</jats:italic> > 0.05). The intra-class correlation coefficient between T1 and T2 was <jats:italic>r</jats:italic> = 0.83 (<jats:italic>p</jats:italic> < 0.0001), the intra-class correlation coefficient for test–retest reliability of the IPOS-Pol items ranged from 0.63 to 0.84 (<jats:italic>p</jats:italic> < 0.0001), and the Cronbach's <jats:italic>α</jats:italic> coefficient for internal consistency was 0.773. The correlation coefficient between the IPOS-Pol and EORTC QLQ-C15-PAL total score was 0.79 (<jats:italic>p</jats:italic> < 0.001).</jats:p>
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<jats:sec id="S1478951521001176_sec_a4">
<jats:title>Significance of results</jats:title>
<jats:p>The patient version of the Polish adaptation of IPOS is a valid and reliable outcome measure for assessing symptoms and concerns of individuals receiving palliative care, as well as the quality of care provided.</jats:p>
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