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Silva WF, Castralli HA, Penha AB, Mariussi PM, Bellaver G, Zago A, Fischer GB, Salvador JC, Salles RF, Barbosa CD. HISTOPLASMOSE MEDULAR REFRATÁRIA AO TRATAMENTO: RELATO DE CASO. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Roborel de Climens A, Tugaut B, Dias Barbosa C, Buggage R, Brun-Strang C. Living with Stargardt disease: insights from patients and their parents. Ophthalmic Genet 2020; 42:150-160. [PMID: 33305649 DOI: 10.1080/13816810.2020.1855663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Background: Stargardt disease (STGD), a rare, inherited macular degeneration most commonly affecting children and young adults, is a rapidly progressive disease leading to severe central vision loss. This research aimed to develop a conceptual disease model describing STGD symptoms and their impact on patients' lives.Material and Methods: Qualitative interviews were conducted with patients (juvenile and adult) and parents of children and adolescents with STGD. Interviewed subjects were enrolled through ophthalmologists from specialized eye centers in the USA and in France. Trained interviewers used semi-structured techniques to elicit concepts relevant to patients and their parents. Thematic analysis of interview transcripts led to the identification of concepts which were organized to generate a disease model.Results: A total of 21 patients (12 in the US; 9 in France) - 14 adults, 7 juveniles - and 7 parents were interviewed. The most cited ocular symptoms were photosensitivity and central vision decline. Interviewees reported limitations on Physical (e.g. difficulty with sports/physical activities), Mental (e.g. frustration and worry, reduced ability to concentrate), Social (e.g. issue with facial recognition and difficulty discussing disease) and Role (e.g. impact on driving and reading, difficulties at school/work) functioning. These impacts were, when possible, mitigated by coping strategies and support (e.g. using electronic devices, setting up routines or accepting the disease).Conclusions: This research provides an overview of symptoms experienced by patients with STGD and highlights the dramatic impact these have on patients' lives, allowing the identification of concepts of importance when evaluating new therapeutic options for STGD.
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Affiliation(s)
| | | | | | - Ronald Buggage
- Research and Development, Sanofi, Chilly-Mazarin, France
| | - Catherine Brun-Strang
- Global Health Economics and Value Assessment Early Portfolio, Sanofi, Chilly-Mazarin, France
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Tandon R, Lenderking WR, Weiss C, Shalhoub H, Barbosa CD, Chen J, Greene M, Meehan SR, Duvold LB, Arango C, Agid O, Castle D. The impact on functioning of second-generation antipsychotic medication side effects for patients with schizophrenia: a worldwide, cross-sectional, web-based survey. Ann Gen Psychiatry 2020; 19:42. [PMID: 32684942 PMCID: PMC7359579 DOI: 10.1186/s12991-020-00292-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 06/29/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It is well established that the different antipsychotics used for schizophrenia symptoms differ substantially in their side effects. However, relatively little is known about the impact of these side effects on functioning from the patient's perspective. We aimed to understand how key side effects of second-generation antipsychotics impact the functioning and quality of life (QoL) of patients with schizophrenia. METHODS This is a cross-sectional, web-based survey of patient-reported side effect burden of antipsychotic drugs in adults with schizophrenia. The survey was deployed in the United States, Canada, Australia, Spain, Italy, Norway, and Denmark. It included sociodemographic and clinical questions, the Quality of Life Enjoyment and Satisfaction Questionnaire Short Form (Q-LES-Q-SF), and the Glasgow Antipsychotic Side-Effect Scale (GASS). Eight pre-defined key side effects classified as activating ("Shaky hands or arms," "Restlessness," and "Difficulty sleeping"), sedating ("Sleepy during the day", "Feeling drugged or like a zombie," and "Feeling dizzy/Fainted") or other side effects ("Problems enjoying sex" and "Gaining weight"), and additional questions related to impacts on function and quality of life were asked. RESULTS In total, 435 participants (mean age: 38 years, 53.8% female) were included. The total Q-LES-Q-SF score indicated overall medium satisfaction with their quality of life (score of 44.3; possible range 14-70). The most prevalent side effects were "Sleepy during the day" (83.2%), "Difficulty sleeping" (74.7%), "Dry mouth" (63.9%), "Problems enjoying sex" (53.4%) and "Gaining weight" (52.4%). Women reported the side effects of "Sleepy during the day", "Problems enjoying sex" and "Gaining weight" more frequently than men. Key side effects impacted physical, social, occupational and psychological aspects of functioning. Patients with key side effects often felt frustrated by their experiences. Total Q-LES-Q-SF score showed a significant inverse correlation with the score of pre-defined groups of side effects indicating worse QoL in association with more severe key side effects in these patients. CONCLUSION Stable patients with schizophrenia taking second-generation antipsychotics live with many side effects, including activating and sedating side effects, sexual side effects, and weight gain. Presence of these side effects is associated with substantial impacts across all aspects of daily functioning and lower quality of life and satisfaction.
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Affiliation(s)
- Rajiv Tandon
- Western Michigan University Homer Stryker M.D. School of Medicine, 300 Portage Street, Kalamazoo, MI 49007 USA
| | | | - Catherine Weiss
- Otsuka Pharmaceutical Development & Commercialization, Inc., 508 Carnegie Center Drive, Princeton, NJ 08540 USA
| | - Huda Shalhoub
- Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD 20814 USA
| | | | - Jun Chen
- Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD 20814 USA
| | - Mallik Greene
- Otsuka Pharmaceutical Development & Commercialization, Inc., 508 Carnegie Center Drive, Princeton, NJ 08540 USA
| | | | | | - Celso Arango
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry and Mental Health, Hospital General Universitario Gregorio Marañón, IiSGM,CIBERSAM, School of Medicine, Universidad Complutense, Calle del Dr. Esquerdo, 46, 28007 Madrid, Spain
| | - Ofer Agid
- Schizophrenia Division, Complex Care & Recovery Program, Centre for Addiction and Mental Health, Toronto, Canada
- Department of Psychiatry and Institute of Medical Science, University of Toronto, 1001 Queen Street West, Toronto, ON M6J 1H4 Canada
| | - David Castle
- St Vincent’s Health and The University of Melbourne, 41 Victoria Parade, Fitzroy, VIC 3065 Australia
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Silva GO, Castro RD, Oliveira LG, Sant'Anna FM, Barbosa CD, Sandes SHC, Silva RS, Resende MFS, Lana AMQ, Nunes AC, Cerqueira MMOP, Souza MR. Viability of Staphylococcus aureus and expression of its toxins (SEC and TSST-1) in cheeses using Lactobacillus rhamnosus D1 or Weissella paramesenteroides GIR16L4 or both as starter cultures. J Dairy Sci 2020; 103:4100-4108. [PMID: 32197850 DOI: 10.3168/jds.2018-16037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 01/29/2020] [Indexed: 01/20/2023]
Abstract
Staphylococcus aureus is one of the main causative agents of food poisoning. This bacterium is an important component of cheese microbiota and plays an important role in foodborne diseases. Another important component of the microbiota is the lactic acid bacterium, which actively participates in processes that define the physicochemical, sensorial, and microbiological features of cheese. Of the various microbiological interactions in cheese, the interaction between lactic acid bacteria and Staph. aureus is most relevant. To this end, we evaluated the viability of Staph. aureus strains and the expression of their enterotoxins in cheeses produced experimentally, using Weissella paramesenteroides GIR16L4 or Lactobacillus rhamnosus D1 or both as starter cultures. Over 7 d, we observed that the presence of lactic acid bacteria did not impair Staph. aureus growth. However, via qPCR we observed a change in the gene expression of staphylococcal enterotoxins, suggesting that molecular communication exists between Staph. aureus strains and lactic acid bacteria in cheese.
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Affiliation(s)
- G O Silva
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil.
| | - R D Castro
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - L G Oliveira
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - F M Sant'Anna
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - C D Barbosa
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - S H C Sandes
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - R S Silva
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - M F S Resende
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - A M Q Lana
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - A C Nunes
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - M M O P Cerqueira
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - M R Souza
- Departamento de Tecnologia e Inspeção de Produtos de Origem Animal, campus Pampulha da Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
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Tandon R, Lenderking WR, Weiss C, Shalhoub H, Barbosa CD, Chen J, Greene M, Meehan SR, Duvold LB, Arango C, Agid O, Castle D. Correction to: The impact on functioning of second-generation antipsychotic medication side effects for patients with schizophrenia: a worldwide, cross-sectional, web-based survey. Ann Gen Psychiatry 2020; 19:45. [PMID: 32793294 PMCID: PMC7418310 DOI: 10.1186/s12991-020-00294-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 08/03/2020] [Indexed: 11/28/2022] Open
Abstract
[This corrects the article DOI: 10.1186/s12991-020-00292-5.].
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Affiliation(s)
- Rajiv Tandon
- Western Michigan University Homer Stryker M.D. School of Medicine, 300 Portage Street, Kalamazoo, MI 49007 USA
| | | | - Catherine Weiss
- Otsuka Pharmaceutical Development & Commercialization, Inc., 508 Carnegie Center Drive, Princeton, NJ 08540 USA
| | - Huda Shalhoub
- Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD 20814 USA
| | | | - Jun Chen
- Evidera, 7101 Wisconsin Avenue, Suite 1400, Bethesda, MD 20814 USA
| | - Mallik Greene
- Otsuka Pharmaceutical Development & Commercialization, Inc., 508 Carnegie Center Drive, Princeton, NJ 08540 USA
| | | | | | - Celso Arango
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry and Mental Health, Hospital General Universitario Gregorio Marañón, IiSGM,CIBERSAM, School of Medicine, Universidad Complutense, Calle del Dr. Esquerdo, 46, 28007 Madrid, Spain
| | - Ofer Agid
- Schizophrenia Division, Complex Care & Recovery Program, Centre for Addiction and Mental Health, Toronto, Canada.,Department of Psychiatry and Institute of Medical Science, University of Toronto, 1001 Queen Street West, Toronto, ON M6J 1H4 Canada
| | - David Castle
- St Vincent's Health and The University of Melbourne, 41 Victoria Parade, Fitzroy, VIC 3065 Australia
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Bharmal M, Fofana F, Barbosa CD, Williams P, Mahnke L, Marrel A, Schlichting M. Correction to: Psychometric properties of the FACT-M questionnaire in patients with Merkel cell carcinoma. Health Qual Life Outcomes 2019; 17:52. [PMID: 30917810 PMCID: PMC6438018 DOI: 10.1186/s12955-019-1122-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 03/15/2019] [Indexed: 11/10/2022] Open
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Kaufman HL, Dias Barbosa C, Guillemin I, Lambert J, Mahnke L, Bharmal M. Living with Merkel Cell Carcinoma (MCC): Development of a Conceptual Model of MCC Based on Patient Experiences. Patient 2018; 11:439-449. [PMID: 29512061 PMCID: PMC6019419 DOI: 10.1007/s40271-018-0301-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Merkel cell carcinoma (MCC) is a rare and aggressive skin cancer with limited treatment options at advanced stages. There is a paucity of data available regarding the impact of MCC and its management on patients' lives. This study aimed to address this gap by interviewing patients with metastatic MCC entering a trial of an immunotherapy (avelumab). METHODS In a single-arm, open-label, international, phase 2 trial in patients with stage IV, chemotherapy-refractory, histologically confirmed MCC, patients were invited to participate in semi-structured phone interviews. These were conducted before avelumab administration. Interview transcripts were analysed qualitatively to identify concepts important to patients relating to their experience of metastatic MCC and its management. RESULTS Nineteen patients were interviewed. Most reported MCC to be painless and asymptomatic. They reported being often misdiagnosed and described a long process before receiving the correct diagnosis. They also reported a feeling of "shock" after being informed of the severity and seriousness of their cancer. Overall, patients did not report impaired physical and cognitive capacities or impact on daily lives, either before or after diagnosis. However, patients and their relatives reported feelings of "worry" and "fear" about the unknown outcome of the disease. Chemotherapy and radiotherapy negatively affected patients physically and psychologically in their everyday lives. CONCLUSIONS MCC disease was not perceived by the interviewed patients to result in severe functional limitations or to severely impact everyday activities, but was associated with substantial negative psychological impact. In contrast, chemotherapy and radiotherapy for MCC are highly debilitating and disrupt patients' lives. CLINICALTRIALS. GOV IDENTIFIER NCT02155647.
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Affiliation(s)
- Howard L Kaufman
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.
- Replimune Inc, Woburn, MA, USA.
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Bharmal M, Fofana F, Barbosa CD, Williams P, Mahnke L, Marrel A, Schlichting M. Psychometric properties of the FACT-M questionnaire in patients with Merkel cell carcinoma. Health Qual Life Outcomes 2017; 15:247. [PMID: 29273043 PMCID: PMC5741938 DOI: 10.1186/s12955-017-0815-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/29/2017] [Indexed: 11/10/2022] Open
Abstract
Background No validated disease-specific questionnaires exist to capture health-related quality of life (HRQoL) in patients with Merkel cell carcinoma (MCC). The Functional Assessment of Cancer Therapy – Melanoma (FACT-M) is validated in patients with melanoma, which shares many similarities with MCC. This paper reports the psychometric properties of the FACT-M in the metastatic MCC population. Methods Data were collected as part of a single-arm, open-label, multicenter trial involving patients with metastatic MCC who had failed at least one previous line of chemotherapy. FACT-M and EQ-5D were administered at baseline, Week 7, Week 13, and Week 25. An optional interview was administered at the same time points. MCC-specific FACT-M scores were derived following a combined quantitative and qualitative approach. Reliability and construct validity of original and additional MCC-specific FACT-M scores were assessed at baseline. Capacity to detect change in tumor size was assessed from baseline to Week 7. Minimally important differences (MIDs) were computed using distribution and anchor-based methods. Results Baseline assessments were available in 70 patients (mean age: 70 years; 74.3% male); 19 patients were interviewed at baseline. Additional MCC-specific scores were as follows: Physical Function score (six items), Psychological Impact score (six items), and MCC summary score (12 items). FACT-M original and additional MCC-specific scores both demonstrated acceptable psychometric properties: high reliability (Cronbach’s alpha: 0.81–0.96), good convergent validity (correlations above 0.4 observed for 88% of items of the Melanoma surgery scale, 75% of items of the Melanoma scale, and 100% of items of the other FACT-M domains). Some evidence of floor/ceiling effects and poor discriminant ability was found. Higher scores (better HRQoL) on all FACT-M domains were observed in patients with better functioning (assessed by ECOG performance score), supporting clinical validity. Despite the small sample for responsiveness analysis (n = 37), the majority of FACT-M scores showed sensitivity to changes in tumor size at Week 7 with small to moderate effect sizes. MIDs were consistent with previously reported values in the literature for FACT-M domains. Conclusions FACT-M is suitable to capture HRQoL in patients with metastatic MCC, thus making it a potential candidate for assessing HRQoL in MCC trials. Trial registration This study is a post-hoc analysis conducted on data collected in Part A of the JAVELIN Merkel 200 trial. This trial was registered on 2 June 2014 with ClinicalTrials.gov as NCT02155647.
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Kaufman H, Lambert J, Barbosa CD, Guillemin I, Mahnke L, Bharmal M. Patient experiences with avelumab vs chemotherapy for treating merkel cell carcinoma: Results from protocol-specified qualitative research. J Clin Oncol 2017. [DOI: 10.1200/jco.2017.35.15_suppl.e21065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e21065 Background: Avelumab is a fully human anti–PD-L1 monoclonal antibody that has shown durable responses and a manageable safety profile in patients (pts) with various tumors, including metastatic Merkel cell carcinoma (mMCC). We report findings from qualitative interviews with mMCC pts about their experiences with avelumab or chemotherapy. Methods: Pts with mMCC who progressed after chemotherapy were enrolled in a registrational, single-arm, multicenter, international phase 2 trial (NCT02155647). Protocol-specified semi-structured phone interviews were conducted at baseline (to document experiences with chemotherapy) and during avelumab treatment at Weeks 13 and 25. Interview transcripts were analyzed qualitatively using a thematic approach. Results: Interviews were conducted with 19 pts at baseline and 10 pts at Weeks 13 and 25. At baseline, most pts (n = 12) reported that chemotherapy was initially successful prior to relapse. At Week 13, pts generally were “optimistic,” but “cautious,” and had “high hopes” regarding avelumab treatment. Pts most frequently reported having no or fewer side effects (n = 6) with avelumab vs prior chemotherapy. At Week 13, fatigue was the most frequently reported impact of avelumab (n = 8); at Week 25, 3 pts still reported fatigue, but 5 “felt less tired” than at Week 13. Most pts (n = 12) had experienced fatigue with chemotherapy; having “less energy” was the most-reported effect (n = 4) when compared with avelumab. Most pts did not report any negative impact of avelumab on everyday lives (n = 7); 3 reported a need “to rest more often after activities.” In contrast, only 6/19 pts reported that chemotherapy had no negative impact or a” very small” negative impact on everyday lives. Eight pts reported feeling “slowed down” or “being limited” in physical capacities during chemotherapy. Eight pts thought that chemotherapy had substantial negative impact on their lives, describing it as “very disruptive,” “debilitating,” or “devastating.” Conclusions: Pts had a more positive experience with avelumab than chemotherapy; it had a minimal detrimental impact on their lives. Clinical trial information: NCT02155647.
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Affiliation(s)
- Howard Kaufman
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ
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Barbosa CD, Balp MM, Kulich K, Germain N, Rofail D. A literature review to explore the link between treatment satisfaction and adherence, compliance, and persistence. Patient Prefer Adherence 2012; 6:39-48. [PMID: 22272068 PMCID: PMC3262489 DOI: 10.2147/ppa.s24752] [Citation(s) in RCA: 319] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
PURPOSE To explore the published evidence on the link between treatment satisfaction and patients' compliance, adherence, and/or persistence. METHODS Articles published from January 2005 to November 2010 assessing compliance, adherence, or persistence and treatment satisfaction were identified through literature searches in Medline, Embase, and PsycInfo. Abstracts were reviewed by two independent researchers who selected articles for inclusion. The main attributes of each study examining the link between satisfaction and adherence, compliance, or persistence were summarized. RESULTS The database searches yielded 1278 references. Of the 281 abstracts that met the inclusion criteria, 20 articles were retained. In the articles, adherence and compliance were often used interchangeably and various methods were used to measure these concepts. All showed a positive association between treatment satisfaction and adherence, compliance, or persistence. Sixteen studies demonstrated a statistically significant link between satisfaction and compliance or persistence. Of these, ten demonstrated a significant link between satisfaction and compliance, two showed a significant link between satisfaction and persistence, and eight demonstrated a link between either a related aspect or a component of satisfaction (eg, treatment convenience) or adherence (eg, intention to persist). An equal number of studies aimed at explaining compliance or persistence according to treatment satisfaction (n = 8) and treatment satisfaction explained by compliance or persistence (n = 8). Four studies only reported correlation coefficients, with no hypothesis about the direction of the link. The methods used to evaluate the link were varied: two studies reported the link using descriptive statistics, such as percentages, and 18 used statistical tests, such as Spearman's correlation or logistic regressions. CONCLUSION This review identified few studies that evaluate the statistical association between satisfaction and adherence, compliance, or persistence. The available data suggested that greater treatment satisfaction was associated with better compliance and improved persistence, and with lower regimen complexity or treatment burden.
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Affiliation(s)
- Carla Dias Barbosa
- Mapi Consultancy, Lyon, France
- Correspondence: Carla Dias Barbosa, Mapi Consultancy, 27 rue de la Villette, 69003 Lyon, France, Tel +33 4 7213 6656, Fax +33 4 7213 5140, Email
| | | | | | | | - Diana Rofail
- Mapi Values UK, Macclesfield, Cheshire, United Kingdom
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Oba-Shinjo SM, Berto AGA, Passerotti CC, Barbosa CD, Sampaio LO. Decorin is one of the proteoglycans expressed in Walker 256 rat mammary carcinoma. Braz J Med Biol Res 2003; 36:1079-89. [PMID: 12886463 DOI: 10.1590/s0100-879x2003000800015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Proteoglycan and glycosaminoglycan content was analyzed in a model of rat mammary carcinoma to study the roles of these compounds in tumorigenesis. Hyaluronic acid and proteoglycans bearing chondroitin and/or dermatan sulfate chains were detected in solid tumors obtained after subcutaneous inoculation of Walker 256 rat carcinoma cells. About 10% of sulfated glycosaminoglycan chains corresponded to heparan sulfate. The small leucine-rich proteoglycan, decorin, was identified as one of the proteoglycans, in addition to others of higher molecular weight, by cross-reaction with an antiserum raised against pig laryngeal decorin and by N-terminal amino acid sequencing. Decorin was separated from other proteoglycans by hydrophobic chromatography and its complete structure was determined. It has a molecular weight of about 85 kDa and a dermatan chain of 45 kDa with 4-sulfated disaccharides. After degradation of the glycosaminoglycan chain, three core proteins of different molecular weight (36, 46 and 56 kDa) were identified. The presence of hyaluronic acid and decorin has been reported in a variety of tumors and tumor cells. In the Walker 256 mammary carcinoma model, hyaluronic acid may play an important role in tumor progression, since it provides a more hydrated extracellular matrix. On the other hand, decorin, which is expressed by stromal cells, represents a host defense response to tumor growth.
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Affiliation(s)
- S M Oba-Shinjo
- Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil.
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