A critical analysis of test-retest reliability in instrument validation studies of cancer patients under palliative care: a systematic review

BACKGROUND

Patient-reported outcome validation needs to achieve validity and reliability standards. Among reliability analysis parameters, test-retest reliability is an important psychometric property. Retested patients must be in a clinically stable condition. This is particularly problematic in palliative care (PC) settings because advanced cancer patients are prone to a faster rate of clinical deterioration. The aim of this study was to evaluate the methods by which multi-symptom and health-related qualities of life (HRQoL) based on patient-reported outcomes (PROs) have been validated in oncological PC settings with regards to test-retest reliability.

METHODS

A systematic search of PubMed (1966 to June 2013), EMBASE (1980 to June 2013), PsychInfo (1806 to June 2013), CINAHL (1980 to June 2013), and SCIELO (1998 to June 2013), and specific PRO databases was performed. Studies were included if they described a set of validation studies. Studies were included if they described a set of validation studies for an instrument developed to measure multi-symptom or multidimensional HRQoL in advanced cancer patients under PC. The COSMIN checklist was used to rate the methodological quality of the study designs.

RESULTS

We identified 89 validation studies from 746 potentially relevant articles. From those 89 articles, 31 measured test-retest reliability and were included in this review. Upon critical analysis of the overall quality of the criteria used to determine the test-retest reliability, 6 (19.4%), 17 (54.8%), and 8 (25.8%) of these articles were rated as good, fair, or poor, respectively, and no article was classified as excellent. Multi-symptom instruments were retested over a shortened interval when compared to the HRQoL instruments (median values 24 hours and 168 hours, respectively; p = 0.001). Validation studies that included objective confirmation of clinical stability in their design yielded better results for the test-retest analysis with regard to both pain and global HRQoL scores (p < 0.05). The quality of the statistical analysis and its description were of great concern.

CONCLUSION

Test-retest reliability has been infrequently and poorly evaluated. The confirmation of clinical stability was an important factor in our analysis, and we suggest that special attention be focused on clinical stability when designing a PRO validation study that includes advanced cancer patients under PC.

Articles with short titles describing the results are cited more often

OBJECTIVE

The aim of this study was to evaluate some features of article titles from open access journals and to assess the possible impact of these titles on predicting the number of article views and citations.

METHODS

Research articles (n = 423, published in October 2008) from all Public Library of Science (PLoS) journals and from 12 Biomed Central (BMC) journals were evaluated. Publication metrics (views and citations) were analyzed in December 2011. The titles were classified according to their contents, namely methods-describing titles and results-describing titles. The number of title characters, title typology, the use of a question mark, reference to a specific geographical region, and the use of a colon or a hyphen separating different ideas within a sentence were analyzed to identify predictors of views and citations. A logistic regression model was used to identify independent title characteristics that could predict citation rates.

RESULTS

Short-titled articles had higher viewing and citation rates than those with longer titles. Titles containing a question mark, containing a reference to a specific geographical region, and that used a colon or a hyphen were associated with a lower number of citations. Articles with results-describing titles were cited more often than those with methods-describing titles. After multivariate analysis, only a low number of characters and title typology remained as predictors of the number of citations.

CONCLUSIONS

Some features of article titles can help predict the number of article views and citation counts. Short titles presenting results or conclusions were independently associated with higher citation counts. The findings presented here could be used by authors, reviewers, and editors to maximize the impact of articles in the scientific community.

The Brazilian Version of the Edmonton Symptom Assessment System (ESAS) Is a Feasible, Valid and Reliable Instrument for the Measurement of Symptoms in Advanced Cancer Patients

PURPOSES

To develop and validate a Portuguese version of the Edmonton Symptom Assessment System (ESAS) in Brazilian patients with advanced cancer.

METHODS

The ESAS was translated and then back translated into Portuguese in accordance with international guidelines. The final version was approved by an Expert Committee after pilot testing on 24 advanced cancer patients. Subsequently, we evaluated the time to complete the assessment, the number of unanswered items, internal consistency, convergent validity, and known-group validity in a sample of 249 advanced cancer patients who completed the ESAS along with the European Organization for Research and Treatment of Cancer Core Quality of Life Questionnaire (EORTC QLQ-C30), Hospital Anxiety and Depression Scale (HADS), and Epworth Sleepiness Scale (ESS). A total of 90 clinically stable patients were retested after 4 to 96 hours (test-retest reliability), and 80 patients answered the ESAS after 21 (± 7) days to measure scale responsiveness using an anchor-based method.

RESULTS

The ESAS was completed in a mean time of only 2.2 minutes. The internal consistency was good (Cronbach's alpha = 0.861), and the removal of single items did not change the overall alpha value. For convergent validity, Spearman's correlation coefficients between the ESAS symptom scores and the corresponding EORTC QLQ-C30 and ESS symptom scores ranged between 0.520 (95% CI = 0.424-0.605) and 0.814 (95% CI = 0.760-0.856), indicating moderate to strong correlations. Test-retest reliability values were considered adequate, with intraclass correlation coefficients ranging from 0.758 (95% CI = 0.627-0.843) to 0.939 (95% CI = 0.905-0.960).

CONCLUSIONS

ESAS is a feasible, valid and reliable multi-symptom assessment instrument for use in Brazil.

Doctor, are you healthy? A cross-sectional investigation of oncologist burnout, depression, and anxiety and an investigation of their associated factors

PURPOSE

Doctors who work at cancer hospitals are at high risk of developing emotional distress. This study evaluated the prevalence of burnout, anxiety, and depression in a sample of oncologists of various specialties and sought to identify how much of this distress is explained by specific pre-established characteristics.

METHODS

This cross-sectional study used online surveys. Burnout was measured using the Maslach Burnout Inventory (MBI), and anxiety and depression were measured using the Hospital Anxiety and Depression Scale (HADS). The variables associated with p-values < 0.10 in the univariate analyses were included in blocks of hierarchical binary logistic regression models to identify the predictors of burnout, depression, and anxiety.

RESULTS

Of the 227 physicians (response rate = 70.5%), 132 (58.1%) were identified as having burnout (high emotional exhaustion [EE] and depersonalization [DP]); furthermore, 28 (12.3%) had depression (HADS-D ≥ 11), and 44 (19.4%) had anxiety (HADS-A ≥ 11). The block of perceptions related to the workplace explained 22.4%, 7.7%, and 10.6% of the variances of burnout, depression, and anxiety, respectively. On the other hand, the outside-of-work characteristics block explained only 3.1%, 13.4%, and 3.4% of the variances of burnout, depression, and anxiety, respectively.

CONCLUSIONS

Work-related stressors are associated with burnout, but few are associated with anxiety and depression. Outside-of-work characteristics explained little of the distress reported by physicians. Strategies focused on perceptions of professional recognition and lower workloads that stimulate positive relationships between doctors and other health professionals are desirable in oncological context.

Prevalence, predictors, and prognostic impact of fatigue among Brazilian outpatients with advanced cancers

PURPOSES

The purposes of this study are to evaluate the impact of cancer-related fatigue (CRF) on quality of life (QoL), and to identify its clinical predictors. In addition, the authors investigated the prognostic impact of CRF and its relationship with the inflammatory marker C-reactive protein.

METHOD

Data regarding patient characteristics, symptom scores, and QoL indices were collected at the initial evaluation. At the same time, blood samples were collected in order to evaluate some laboratorial markers. Patients were followed by telephone interviews every 15 days until death. CRF was defined as ≥66.67 points on EORTC QLQ-C30 fatigue subscale.

RESULTS

The examined patients had a median age of 61 years (range, 21-86 years) and 50.7 % were male. Median Karnofsky performance score (KPS) was 75.5 (SD, 15.1). The prevalence of CRF was 25 % (55 out of 221). Overall, patients with CRF presented higher symptom burden and also worst QoL scores. The following variables were independently associated with CRF: nausea (OR 1.22, p = 0.009), dyspnea (OR 1.33, p = 0.002), KPS (OR 0.96, p = 0.009), body mass index (OR 0.93, p = 0.046), and C-reactive protein (OR 1.08, p = 0.004). The median overall survival (OS) was lower in CRF patients (p < 0.0001). Only KPS (HR = 0.96, p < 0.001) and C-reactive protein (HR = 1.07, p < 0.001) were independent prognostic factors for OS.

CONCLUSIONS

Advanced cancer patients (ACP) with CRF had a higher burden of symptoms and impaired QoL. Our findings support the hypothesis that chronic inflammatory state (CIS) could play a role in the pathogenesis of fatigue in ACP. Moreover, CIS seems to have greater prognostic impact than the associated fatigue.

Perivascular epithelioid cell tumor of the liver coexisting with a gastrointestinal stromal tumor

Approximately 10% of patients with gastrointestinal stromal tumors (GIST) develop other neoplasms, either synchronously or metachronously. In this report we describe coexistence of a gastrointestinal stromal tumor and a hepatic perivascular epithelioid cell tumor (PEComa) in a 51-year-old woman with no evidence of tuberous sclerosis. A subcapsular hepatic nodule (0.8 cm in diameter) was found during surgery for symptomatic gastric neoplasm (15 cm in diameter) arising from the lesser curvature. Both tumors revealed histomorphological and immunohistochemical features confirming a diagnosis of a small incidental hepatic PEComa and a high risky extramural gastric GIST, respectively. The patient remained disease-free 25 mo after surgery with no evidence of tumor recurrence or new neoplasms. To our knowledge, this is the first report of PEComa in a patient with GIST. Hepatic lesions detected synchronously or metachronously in patients with GISTs may represent histogenetically distinct lesions and should be sampled to confirm or exclude metastatic GISTs.

Effectiveness of a palliative care outpatient programme in improving cancer-related symptoms among ambulatory Brazilian patients

The focuses of palliative care are to provide symptom relief and improve quality of life through an interdisciplinary approach. Previous studies conducted to evaluate the effectiveness of palliative care in reducing symptom distress among outpatients confirmed the importance of the palliative care approach. To our knowledge, there is no published information from Brazil regarding the impact of a palliative care outpatient programme in reducing symptom distress. Symptom scores from 232 patients were measured using Edmonton Symptom Assessment System scales in two consecutive consults. Changes in symptoms at follow-up visit were analysed using Wilcoxon signed-rank paired test. The symptom subtraction indices (SSI) (follow-up scores minus baseline scores) were calculated and then analysed with Spearman's correlation. Edmonton Symptom Assessment System median scores at follow-up visits were statistically significant reduced in all symptoms evaluated. All the SSI positively correlated with well-being-SSI. Other important SSI correlations were: fatigue-SSI and anxiety-SSI, and fatigue-SSI and dyspnoea-SSI. Our palliative care outpatient programme was able to provide a significant improvement in the symptoms evaluated. The well-being-SSI was positively correlated with all the SSI, verifying that the control of symptoms in palliative care is essential for the patient well-being. Adequate/inadequate control of specifically symptoms seems to indirectly improve/worsen other symptoms.

Further evaluation of the EORTC QLQ-C30 psychometric properties in a large Brazilian cancer patient cohort as a function of their educational status

PURPOSE

The European Organization for Research and Treatment of Cancer Core Quality of Life Questionnaire (EORTC QLQ-C30) is considered a valid instrument for use in Brazil. However, the previous Brazilian validation study included only 30 lung cancer patients and only measured test-retest reliability. The aim of this study was to evaluate the psychometric properties of the EORTC QLQ-C30 in a sample of cancer patients at different educational levels who completed the instrument administered by an interviewer.

METHODS

Data from six prospective studies conducted by the same group of researchers were combined in this study (N = 986).

RESULTS

Reliability was assessed using Cronbach's alpha coefficient, all values of which were >0.7, with the exception of cognitive functioning, social functioning, and nausea and vomiting (α = 0.57, α = 0.69, and α = 0.68, respectively). In multi-trait scaling analysis, convergent and divergent validity were considered adequate (validity indices were 91.6 and 97.4%). In general, moderate to strong correlations were found between the subscales of the EORTC QLQ-C30 and its respective dimensions from the WHOQOL-bref, the hospital anxiety and depression scale, and the Edmonton Symptom Assessment System (ESAS) instruments. In addition, the EORTC QLQ-C30 was able to differentiate groups of patients with distinct performance statuses and types of treatment (known-group validation). Statistical analyses were also performed on educational status, yielding similar results.

CONCLUSIONS

Detailed psychometric property data using the EORTC QLQ-C30 in Brazil are added by this study. In addition, we demonstrated that this instrument is in general reliable and valid regardless of the patient educational level.

Absence of transforming growth factor-beta type II receptor is associated with poorer prognosis in HER2-negative breast tumours

BACKGROUND

The clinical relevance of transforming growth factor-beta (TGF-beta)-signalling pathway in breast carcinomas (BCs) remained elusive. This study aimed to evaluate the prognostic value of TGF-beta1 and transforming growth factor-beta type II receptor (TGF-betaRII) expression levels in tumour cells and their association with the established biomarkers in BC.

PATIENTS AND METHODS

In 324 BC from patients with long-term follow-up, the TGF-beta1 and TGF-betaRII transcript and protein expression levels were assessed.

RESULTS

TGF-beta1 and TGF-betaRII down-expression was significantly associated with BC. Negative TGF-beta1 and TGF-betaRII protein status was associated with the development of distant metastasis (P = 0.003 and P = 0.029, respectively). In multivariate analysis, TGF-beta1-positive tumours were associated with increased disease-free survival (DFS) [hazard ratio (HR) = 0.489, P = 0.003]. TGF-betaRII positivity was an independent prognostic factor for DFS (HR = 0.439, P = 0.001) and overall survival (OS) (HR = 0.409, P = 0.003) in human epidermal growth factor receptor-2 (HER2)-negative patients. Absence of TGF-beta1 and TGF-betaRII proteins in breast tumour cells was significantly associated with metastasis development.

CONCLUSIONS

To the best of our knowledge, this is the first report indicating the relevance of HER2 status in discriminating TGF-betaRII as a prognostic marker for DFS and OS in human BC. These data indicate that TGF-betaRII protein analysis in tumour cells could be introduced in clinical practice as additional prognostic biomarker in HER2-negative BC.

What are the personal and professional characteristics that distinguish the researchers who publish in high- and low-impact journals? A multi-national web-based survey

PURPOSE

This study identifies the personal and professional profiles of researchers with a greater potential to publish high-impact academic articles.

METHOD

The study involved conducting an international survey of journal authors using a web-based questionnaire. The survey examined personal characteristics, funding, and the perceived barriers of research quality, work-life balance, and satisfaction and motivation in relation to career. The processes of manuscript writing and journal publication were measured using an online questionnaire that was developed for this study. The responses were compared between the two groups of researchers using logistic regression models.

RESULTS

A total of 269 questionnaires were analysed. The researchers shared some common perceptions; both groups reported that they were seeking recognition (or to be leaders in their areas) rather than financial remuneration. Furthermore, both groups identified time and funding constraints as the main obstacles to their scientific activities. The amount of time that was spent on research activities, having >5 graduate students under supervision, never using text editing services prior to the publication of articles, and living in a developed and English-speaking country were the independent variables that were associated with their article getting a greater chance of publishing in a high-impact journal. In contrast, using one's own resources to perform studies decreased the chance of publishing in high-impact journals.

CONCLUSIONS

The researchers who publish in high-impact journals have distinct profiles compared with the researchers who publish in low-impact journals. English language abilities and the actual amount of time that is dedicated to research and scientific writing, as well as aspects that relate to the availability of financial resources are the factors that are associated with a successful researcher's profile.

Development of a screening tool to improve the referral of patients with breast and gynecological cancer to outpatient palliative care

OBJECTIVE

New strategies that allow timely referral to outpatient palliative care (PC) for cancer patients are sought. The authors developed a 16-item checklist tool with 3 categories of care priorities based on patients' physical functionality. To evaluate the potential clinical impact of the use of these criteria in patients with advanced breast and gynecological cancer (ABGC) seen at oncology clinics.

METHODS

The study was divided into 2 phases. In Phase I, research nurse prospectively assessed the referral criteria among patients with ABGC who had not yet been referred to PC. The oncologists' (routine) referral rate was compared to the referral rate if the criteria were applied universally. In Phase II, we implemented routine screening with these referral criteria without automatic trigger. Patients not yet evaluated by PC were retrospectively evaluated regarding the rate of screening and how often they met criteria.

RESULTS

Among the 120 patients evaluated in Phase I, oncologists referred 23 (19%) and the screening criteria identified another 82 (68%) who may benefit from PC, potentially increasing the PC referral rate by 3.2-fold. Patients would have been referred earlier using the criteria than based on oncologists' judgement (median survival 451 days vs. 178, p < 0.001). In Phase II, among the patients who were not yet receiving PC, 38.6% (97 of 251) met at least one criterion.

CONCLUSION

The use of referral criteria has the potential to significantly increase the number of timely palliative care referral. Further research is needed to test the implementation of these criteria.

Associations of Body Mass Index and Physical Activity With Sexual Dysfunction in Breast Cancer Survivors

Sexual dysfunction is a common and distressing consequence of breast cancer (BC) treatment. In the present study, we investigated the sexual functioning of BC patients and its association with women's personal characteristics and cancer treatments. In this cross-sectional study, sexual function was assessed using the Female Sexual Function Index (FSFI). The health-related quality of life (HRQOL) was measured using the European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 and its breast module BR-23. Of the 235 participants approached, 216 participants were included in the study. Of these, 63 patients reported no sexual activity in the last month and thus were analyzed only in relation to the sexual desire domain of FSFI. A total of 154 (71.3 %) patients were classified with hypoactive sexual desire disorder (HSDD). From those patients reporting sexual activity in the last month, 63.3 % (97 out of 153) were classified with sexual dysfunction. Using hierarchical logistic regression, the variance explained (change in R 2) by the addition of body mass index (BMI) and mild to moderate physical activity in the prediction models of sexual dysfunction and HSDD were 6.8 and 7.2 %, respectively. Age, BMI, and physical activity were independently associated with sexual dysfunction and HSDD. Additionally, BC patients with sexual dysfunction reported lower scores on global HRQOL, role functioning, and fatigue. Based on our findings, BC survivors should be encouraged to practice regular physical activity and to lose weight in order to avoid sexual dysfunction. However, future clinical trials are needed to confirm these findings.

Acute coronary syndrome associated with continuous 5-Fluorouracil infusion in a patient with metastatic colorectal cancer-a case report with a discussion on this clinical dilemma

INTRODUCTION

5-Fluorouracil (5-FU) is considered to be the backbone of colorectal cancer (CRC) systemic therapy since the great majority of recommended regimens include its administration. A clinical picture consisting of chest pain, sometimes cardiac enzyme elevation, electrocardiogram abnormalities consistent with myocardial ischemia, and normal coronary angiogram associated with 5-FU administration have been infrequently reported. The clinical dilemma is: which chemotherapy regimen should we use in CRC patients with a previous acute coronary syndrome (ACS) associated with 5-FU?

CASE REPORT

We describe the case of a 55-year-old otherwise healthy woman with metastatic colon adenocarcinoma who presented an ACS probably secondary to arterial vasospasm while receiving continuous intravenous 5-FU infusion (mFOLFOX6 regimen). After the ACS, the patient was treated with raltitrexate plus oxaliplatin (TOMOX) and subsequently with irinotecan plus cetuximab with no other cardiac event.

CONCLUSION

The risk of cardiotoxicity associated with 5-FU is low but real. The probable mechanism is arterial vasospasm, as suggested by our case report. Both the use of the TOMOX regimen and irinotecan plus cetuximab seems to be safe regimens to be considered in this clinical scenario.

Development and validation of a prognostic nomogram for ambulatory patients with advanced cancer

Predicting survival of advanced cancer patients (ACPs) is a difficult task. We aimed at developing and testing a new prognostic tool in ACPs when they were first referred to palliative care (PC). A total of 497 patients were analyzed in this study (development sample, n = 221; validation sample, n = 276). From 35 initial putative prognostic variables, 14 of them were selected for multivariable Cox regression analyses; the most accurate final model was identified by backward variable elimination. Parameters were built into a nomogram to estimate the probability of patient survival at 30, 90, and 180 days. Calibration and discrimination properties of the Barretos Prognostic Nomogram (BPN) were evaluated in the validation phase of the study. The BPN was composed of 5 parameters: sex, presence of distant metastasis, Karnofsky Performance Status (KPS), white blood cell (WBC) count, and serum albumin concentration. The C-index was 0.71. The values of the area under the curve (AUC) of the receiver operating characteristic (ROC) curve were 0.84, 0.74, and 0.74 at 30, 90, and 180 days, respectively. There were good calibration results according to the Hosmer-Lemeshow test. The median survival times were 313, 129, and 37 days for the BPN scores <25th percentile (<125), 25th to 75th percentile (125-175), and >75th percentile (>175), respectively (P < .001). The BPN is a new prognostic tool with adequate calibration and discrimination properties. It is now available to assist oncologists and palliative care physicians in estimating the survival of adult patients with advanced solid tumors.

A pilot study addressing the impact of religious practice on quality of life of breast cancer patients during chemotherapy

The aim of this preliminary study was to investigate whether religious practice can modify quality of life (QoL) in BC patients during chemotherapy. QoL and religion practice questionnaire (RPQ) scores were evaluated in a sample of BC patients in different moments. Before chemotherapy initiation, women with lower physical and social functional scores displayed higher RPQ scores. On the other hand, low RPQ patients worsened some QoL scores over time. Body image acceptance was positively correlated with religious practice and specifically praying activity. This preliminary study suggests the importance of religion in coping with cancer chemotherapy.

Absence of TGF-βRII predicts bone and lung metastasis and is associated with poor prognosis in stage III breast tumors

In the case of operated breast cancer (BC), prognostic markers help to determine if the patient needs additional treatment and predictive markers help the clinician to decide which treatment to use. Thus, a better knowledge of known predictive and prognostic markers and the identification of new markers, may improve the treatment of BC patients. The transforming growth factor-beta type II receptor (TGF-βRII), a main receptor of transforming growth factor beta pathway, is a potential new prognostic marker. The aims of the present study were to investigate both the predictive and prognostic impact of TGF-βRII in BC samples. TGF-βRII protein expression was evaluated using immunohistochemistry on a tissue microarray containing 110 TNM stage III BC samples obtained prior to doxorubicin-based neoadjuvant chemotherapy (NAC). Our results demonstrate that TGF-βRII did not predict the response to NAC. On the other hand, an association between TGF-βRII-negative tumor and higher risk of metastasis to lungs and bones was verified. TGF-βRII negativity was an independent prognostic factor for decreased disease-free and overall survival.

The impact of religiosity and individual prayer activities on advanced cancer patients' health: is there any difference in function of whether or not receiving palliative anti-neoplastic therapy?

Consecutive patients (n = 221) presenting for initial consultation at a palliative care outpatient clinic were prospectively interviewed and then followed until death. Individual prayer activity (IPA) and global religion scores were associated with quality of life, symptoms, inflammatory markers, and survival. Analyses were adjusted for whether patients were still receiving anti-neoplastic therapies (ANTs) or not. Higher religion scores were associated with lower levels of inflammation in advanced cancer patients still undergoing ANTs. Additionally, higher IPA was an independent good prognostic factor in patients on active ANTs. Further studies are necessary to confirm these findings and to investigate possible biological mechanisms involved.

Development of a new multimedia instrument to measure cancer-specific quality of life in Portuguese-speaking patients with varying literacy skills

PURPOSE

To develop and validate a new multimedia instrument to measure health-related quality of life (HRQOL) in Portuguese-speaking patients with cancer.

METHODS

A mixed-methods study conducted in a large Brazilian Cancer Hospital. The instrument was developed along the following sequential phases: identification of HRQOL issues through qualitative content analysis of individual interviews, evaluation of the most important items according to the patients, review of the literature, evaluation by an expert committee, and pretesting. In sequence, an exploratory factor analysis was conducted (pilot testing, n = 149) to reduce the number of items and to define domains and scores. The psychometric properties of the IQualiV-OG-21 were measured in a large multicentre Brazilian study (n = 323). A software containing multimedia resources were developed to facilitate self-administration of IQualiV-OG-21; its feasibility and patients' preferences ("paper and pencil" vs. software) were further tested (n = 54).

RESULTS

An exploratory factor analysis reduced the 30-item instrument to 21 items. The IQualiV-OG-21 was divided into 6 domains: emotional, physical, existential, interpersonal relationships, functional and financial. The multicentre study confirmed that it was valid and reliable. The electronic multimedia instrument was easy to complete and acceptable to patients. Regarding preferences, 61.1 % of them preferred the electronic format in comparison with the paper and pencil format.

CONCLUSIONS

The IQualiV-OG-21 is a new valid and reliable multimedia HRQOL instrument that is well-understood, even by patients with low literacy skills, and can be answered quickly. It is a useful new tool that can be translated and tested in other cultures and languages.

The Functionality Assessment Flowchart (FAF): a new simple and reliable method to measure performance status with a high percentage of agreement between observers

BACKGROUND

Performance status (PS) assessment is an integral part of the decision-making process in cancer care. Karnofsky Performance Status (KPS) and Eastern Cooperative Oncology Group (ECOG) PS are the most widely used tools. In some studies, the absolute agreement rate of these tools between observers has been moderate to low. The present study aimed to evaluate the inter-observer reliability and construct validity of the new Functionality Assessment Flowchart (FAF) and compare it with ECOG PS and KPS in a sample of cancer patients.

METHODS

The patients were recruited by convenience from the waiting rooms of the Breast and Gynecology Ambulatory in a cross-sectional study. Two trained medical students (observer A) and five medical oncologists (observers B) independently rated women according to the ECOG PS, KPS and FAF. After the determining the PS scores, observer A administered the Functional Assessment of Cancer Therapy-Fatigue (FACT-F) questionnaire to the participants. The agreements between observers A and B were investigated using the absolute agreement rate (%), weighted and unweighted kappa and Spearman's correlation test. For construct validity, the PS scores were correlated with functional and fatigue scores by performing correlation analysis.

RESULTS

Eighty women with a median age of 57 years were included in the study (86% accrual rate). Among these women, 39 (48.8%) had advanced cancer. The overall absolute agreement rate between observers was 49.4% for KPS, 67% for ECOG PS, and 78.2% for FAF. When using unweighted kappa values, the inter-observer reliability was "fair", "moderate" and "substantial" for KPS, ECOG PS and FAF, respectively. However, when using weighted kappa statistics, "substantial" agreement was observed for KPS and ECOG PS and "nearly perfect" agreement was observed for FAF. All of the PS scales correlated very well with the functional and fatigue scores.

CONCLUSIONS

We present a new instrument with moderate to high inter-observer agreement and adequate construct validity to measure PS in cancer patients.

How to Advance Palliative Care Research in South America? Findings From a Delphi Study

CONTEXT

Progress in palliative care (PC) necessarily involves scientific development. However, research conducted in South America (SA) needs to be improved.

OBJECTIVES

To develop a set of recommendations to advance PC research in SA.

METHODS

Eighteen international PC experts participated in a Delphi study. In round one, items were developed (open-ended questions); in round two, each expert scored the importance of each item (from 0 to 10); in round three, they selected the 20 most relevant items. Throughout the rounds, the five main priority themes for research in SA were defined. In Round three, consensus was defined as an agreement of ≥75%.

RESULTS

60 potential suggestions for overcoming research barriers in PC were developed in round one. Also in Round one, 88.2% (15 of 17) of the experts agreed to define a priority research agenda. In Round two, the 36 most relevant suggestions were defined and a new one added. Potential research priorities were investigated (open-ended). In Round three, from the 37 items, 10 were considered the most important. Regarding research priorities, symptom control, PC in primary care, public policies, education and prognosis were defined as the most relevant.

CONCLUSION

Potential strategies to improve scientific research on PC in SA were defined, including stimulating the formation of collaborative research networks, offering courses and workshops on research, structuring centers with infrastructure resources and trained researchers, and lobbying governmental organizations to convince about the importance of palliative care. In addition, priority research topics were identified in the region.

Anticancer Treatment Goals and Prognostic Misperceptions among Advanced Cancer Outpatients

(1) Background: In the context of cancer incurability, the communication processes involving clinicians and patients with cancer are frequently complex. (2) Methods: A cross-sectional study that investigated outpatients with advanced cancers and their oncologists. Both were interviewed immediately after a medical appointment in which there was disease progression and/or clinical deterioration, and were asked about the patient’s chance of curability and the goals of the prescribed cancer treatment. The patients were asked whether they would like to receive information about prognosis and how they would like to receive it. The analyses of agreement on perceptions were performed using the Kappa’s test. (3) Results: the sample consisted of 90 patients and 28 oncologists. Seventy-eight (87.6%) patients answered that they wanted their oncologist to inform them about their prognosis; only 35.2% (n = 31) of them said they received such information at their present appointment. Regarding how they would prefer prognostic disclosure, 61.8% (n = 55) mentioned that the oncologist should consider ways to keep the patient’s hope up; 73% (n = 65) of the patients reported odds >50% of cure. The agreement between oncologists’ and their patients’ perceptions regarding the treatment goals and curability was slight (k = 0.024 and k = 0.017, respectively). (4) Conclusions: The perceptions of patients and their oncologists regarding the goals of treatment and their chances of cure were in disagreement. New approaches are needed to improve the communication process between oncologists and patients with advanced cancer.

What are the best terms in Portuguese to explain the concepts of "fatigue" and "depression" in cancer patients?

OBJECTIVE

Although "fatigue" and "depression" are well-accepted clinical terms in the English language, they are ill defined in many other languages, including Portuguese. We aimed to investigate the most appropriate words to describe cancer-related fatigue (CRF) and depression in Brazilian cancer patients.

METHOD

The interviewers read to patients two clinical vignettes describing fatigued patients and two others describing depressed patients. Participants were asked to choose from among "fatigue," "tiredness," "weakness," "depression," and "sadness" the best and worst terms to explain the vignettes. In addition, they were administered an instrument containing numeric rating scales (NRSs), addressing common symptoms, including the aforementioned terms. Pearson correlation analysis and accuracy diagnostic tests were conducted using the Hospital Anxiety and Depression Scale (HADS) and the Functional Assessment of Cancer Treatment-Fatigue (FACIT-F) as references.

RESULTS

Among the 80 participants, 40% reported that the best term to explain the concept of CRF was "tiredness," and 59% chose "sadness" as the best descriptor of depression. Regarding diagnostic accuracy, the areas under the curve (AUCs) for "fatigue," "weakness," and "tiredness" were 0.71, 0.81, and 0.76, respectively; the AUCs for "depression" and "sadness" ranged from 0.81 to 0.91 and 0.73 to 0.83, respectively. Negative correlations were found among FACIT-F fatigue subscale scores and NRS scores for "fatigue" (r = -0.58), "tiredness" (r = -0.67), and "weakness" (r = -0.62). Regarding depression, there were positive correlations between HADS-D scores and both NRS for "depression" (r = 0.61) and "sadness" (r = 0.54).

SIGNIFICANCE OF RESULTS

"Tiredness" was considered the best descriptor of CRF. Taking into consideration the clinical correlation with depression scores, the term "depression" was accepted as the best term to explain the concept of depression.