Department of Radiation Oncology, Tata Memorial Centre (TMH/ACTREC), Homi Bhabha National Institute (HBNI), Mumbai, Maharashtra, India.
Department of Clinical Research Secretariat, Tata Memorial Centre (TMH/ACTREC), Homi Bhabha National Institute (HBNI), Mumbai, Maharashtra, India.
J Cancer Res Ther. 2024 Jul 1;20(5):1464-1471. doi: 10.4103/jcrt.jcrt_2076_22. Epub 2024 Jan 22.
This study reports the psychometric properties of OUTPASAT-35RT questionnaire from a large Indian cancer cohort treated with ambulatory radiotherapy (RT) at a tertiary-care comprehensive cancer center.
Adults with a pathologically proven diagnosis of cancer undergoing fractionated RT (≥10 fractions) with the ability to read and understand English, Hindi, or Marathi were accrued after written informed consent. Patients were administered a language-appropriate version of OUTPATSAT-35RT along with European Organization for Research and Treatment of Cancer (EORTC) generic quality-of-life questionnaire (QLQ-C30) at conclusion of RT (±3 days). Psychometric properties of OUTPATSAT-35RT were analyzed.
A total of 314 patients were accrued between 2018 and 2020. A negligible floor effect (<2%) but a high ceiling effect (>15%) was observed for OUTPATSAT-35RT. Multi-trait analysis revealed satisfactory validity and reliability of the questionnaire. Pearson's correlation coefficient (PCC) of individual item score with own scale was >0.4 suggesting good convergent validity. Discriminant validity was satisfactory as the PCC with its own scale/own domain was greater than with other scales of the same domain and other domains of OUTPATSAT-35RT, respectively. Correlation of scales of OUTPATSAT-35RT with scales of QLQ-C30 demonstrated acceptable divergent validity (all values of PCC <0.3). Cronbach's alpha was >0.7 suggesting good internal consistency. Test-retest reliability was good with intra-class coefficient being >0.7. Economic status was the only socio-demographic factor correlating significantly with OUTPATSAT-35RT scores; satisfaction of patients with the delivery of care increased with increasing family income.
The psychometric properties of OUTPATSAT-35RT were found to be acceptable and satisfactory during validation testing in a large Indian cohort.
本研究报告了来自一家三级癌症综合中心接受门诊放疗（RT）治疗的大型印度癌症队列的 OUTPASAT-35RT 问卷的心理测量特性。
在书面知情同意后，纳入了病理证实患有癌症、能够阅读和理解英语、印地语或马拉地语的成年人，他们正在接受分割 RT（≥10 次分割）。在 RT 结束时（±3 天），患者接受了 OUTPATSAT-35RT 的语言适宜版本以及欧洲癌症研究与治疗组织（EORTC）通用生活质量问卷（QLQ-C30）。分析了 OUTPATSAT-35RT 的心理测量特性。
2018 年至 2020 年间共纳入 314 例患者。OUTPATSAT-35RT 观察到轻微的地板效应（<2%）但高天花板效应（>15%）。多特质分析显示问卷具有良好的有效性和可靠性。个体项目得分与自身量表的 Pearson 相关系数（PCC）>0.4，表明具有良好的收敛效度。区分效度令人满意，因为与同一域的其他量表和 OUTPATSAT-35RT 的其他域相比，与自身量表/自身域的 PCC 更大。OUTPATSAT-35RT 量表与 QLQ-C30 量表的相关性表明具有可接受的发散效度（所有 PCC 值<0.3）。Cronbach's alpha>0.7，表明具有良好的内部一致性。重测信度良好，内类系数>0.7。经济状况是唯一与 OUTPATSAT-35RT 评分显著相关的社会人口学因素；随着家庭收入的增加，患者对护理提供的满意度也随之提高。
在对来自印度大型队列的 OUTPATSAT-35RT 进行验证测试时，发现其心理测量特性可接受且令人满意。
