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Dunlop HM, Williams LJ, Hall PS, Barber M, Dodds C, Figueroa JD. Evaluation of the association of area-level socioeconomic deprivation and breast cancer recurrence by oestrogen receptor subtypes in Scotland. Breast Cancer Res 2023; 25:106. [PMID: 37784154 PMCID: PMC10546786 DOI: 10.1186/s13058-023-01704-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 08/30/2023] [Indexed: 10/04/2023] Open
Abstract
BACKGROUND Women from socioeconomically deprived areas have lower breast cancer (BC) incidence rates for screen-detected oestrogen receptor (ER) + tumours and higher mortality for select tumour subtypes. We aimed to determine if ipsilateral breast cancer recurrence (IBR) differs by Scottish Index of Multiple Deprivation (SIMD) quintile and tumour subtype in Scotland. METHODS Patient data for primary invasive BC diagnosed in 2007-2008 in Scotland was analysed. Manual case-note review for 3495 patients from 10 years post-diagnosis was used. To determine the probability of IBR while accounting for the competing risk of death from any cause, cumulative incidence functions stratified by ER subtype and surgery were plotted. Multivariable Cox Proportional Hazards models were used to estimate the association of SIMD accounting for other predictors of IBR. RESULTS Among 2819 ER + tumours, 423 patients had a recurrence and 438 died. SIMD was related to death (p = 0.018) with the most deprived more likely to have died in the 10-year period (17.7% vs. 12.9%). We found no significant differences by SIMD in prognostic tumour characteristics (grade, TNM stage, treatment, screen-detection) or risk of IBR. Among 676 patients diagnosed with ER- tumours, 105 died and 185 had a recurrence. We found no significant differences in prognostic tumour characteristics by SIMD except screen detection with the most deprived more likely than the least to have their tumours detected from screening (46.9% vs. 28%, p = 0.03). Among patients with ER- tumours, 50% had mastectomy and the most deprived had increased 5-year IBR risk compared to the least deprived (HR 3.03 [1.41-6.53]). CONCLUSIONS IBR is not a major contributor to mortality differences by SIMD for the majority of BC patients in our study. The lack of inequities in IBR are likely due to standardised treatment protocols and access to healthcare. The association with socioeconomic deprivation and recurrence for ER- tumours requires further study.
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Affiliation(s)
- Hayley M Dunlop
- The Ohio State University College of Medicine, Columbus, OH, USA
| | - Linda J Williams
- Edinburgh Clinical Trials Unit, The Usher Institute, The University of Edinburgh, Edinburgh, EH16 4UX, UK
| | - Peter S Hall
- Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - Matthew Barber
- Edinburgh Breast Unit, NHS Lothian, Western General Hospital, Edinburgh, UK
| | | | - Jonine D Figueroa
- Centre for Global Health, The Usher Institute, The University of Edinburgh, Edinburgh, EH8 9AG, UK.
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
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Poiseuil M, Payet C, Molinié F, Dabakuyo-Yonli TS, Mathoulin-Pelissier S, Amadeo B, Coureau G. Survival after breast cancer according to participation in organised or opportunistic screening and deprivation. Cancer Epidemiol 2023; 82:102312. [PMID: 36508966 DOI: 10.1016/j.canep.2022.102312] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/25/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Many studies have investigated the survival of women by comparing those who participated in organised screening with those who did not. However, among those who do not participate in organised screening, some women undergo opportunistic screening, but these women remain difficult to identify, particularly in France. Therefore, the aim of this study was to identify opportunistic screening, and then to study survival after breast cancer separately according to participation in organised, opportunistic or no screening, and taking into account sociodemographic inequalities. METHODS The study population was identified from 3 French cancer registries, whose data was crossed with the screening coordination centers and the National Health Data System to identify the different type of screening. The European Deprivation Index was used to define the level of deprivation. We estimated net survival using the Pohar-Perme method. RESULTS The 5-year net survival probabilities were higher for women who attended organised screening (97.0 %) than for women with opportunistic screening (94.1 %) or non-attenders (78.1 %). According to the level of deprivation, a significant difference was observed between the groups of women screened by organised and opportunistic screening, compared to the non-attenders. CONCLUSION The identification of opportunistic screening is an important element in identifying women who do not screening. It enables to us to see that women who do not attend any screening have a much higher loss-of-opportunity in terms of survival than those who participate in organised or opportunistic screening, and even more so in the most deprived areas.
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Affiliation(s)
- Marie Poiseuil
- Univ. Bordeaux, Gironde General Cancer Registry, 33000 Bordeaux, France; Inserm, Bordeaux Population Health, Research Center U1219, Team EPICENE, 33000 Bordeaux, France.
| | - Catherine Payet
- Centre Régional de Coordination du Dépistage des Cancers (CRCDC), Nouvelle Aquitaine, France.
| | - Florence Molinié
- Loire-Atlantique/Vendée Cancer Registry, Nantes, France; CERPOP, Université de Toulouse, Toulouse, France; FRANCIM Network of French Cancer Registries, France.
| | - Tienhan Sandrine Dabakuyo-Yonli
- FRANCIM Network of French Cancer Registries, France; Breast and Gynaecologic Cancer Registry of Côte d'Or, Georges Francois Leclerc Comprehensive Cancer Centre, INSERM U1231, 1 rue Professeur Marion, Dijon, France; Epidemiology and Quality of Life Research Unit, INSERM U1231, Dijon, France.
| | - Simone Mathoulin-Pelissier
- Inserm, Bordeaux Population Health, Research Center U1219, Team EPICENE, 33000 Bordeaux, France; Institut Bergonie, Inserm CIC 1401, Clinical and Epidemiological Research Unit, 351 cours de la Libération, 33405 Talence cedex, France.
| | - Brice Amadeo
- Univ. Bordeaux, Gironde General Cancer Registry, 33000 Bordeaux, France; Inserm, Bordeaux Population Health, Research Center U1219, Team EPICENE, 33000 Bordeaux, France; FRANCIM Network of French Cancer Registries, France.
| | - Gaëlle Coureau
- Univ. Bordeaux, Gironde General Cancer Registry, 33000 Bordeaux, France; Inserm, Bordeaux Population Health, Research Center U1219, Team EPICENE, 33000 Bordeaux, France; FRANCIM Network of French Cancer Registries, France.
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3
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Woods LM, Belot A, Atherton IM, Ellis-Brookes L, Baker M, Ingleby FC. Are deprivation-specific cancer survival patterns similar according to individual-based and area-based measures? A cohort study of patients diagnosed with five malignancies in England and Wales, 2008-2016. BMJ Open 2022; 12:e058411. [PMID: 35688589 PMCID: PMC9189835 DOI: 10.1136/bmjopen-2021-058411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 05/13/2022] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To investigate if measured inequalities in cancer survival differ when using individual-based ('person') compared with area-based ('place') measures of deprivation for three socioeconomic dimensions: income, deprivation and occupation. DESIGN Cohort study. SETTING Data from the Office for National Statistics Longitudinal Study of England and Wales, UK, linked to the National Cancer Registration Database. PARTICIPANTS Patients diagnosed with cancers of the colorectum, breast, prostate, bladder or with non-Hodgkin's lymphoma during the period 2008-2016. PRIMARY AND SECONDARY OUTCOME MEASURES Differentials in net survival between groups defined by individual wage, occupation and education compared with those obtained from corresponding area-level metrics using the English and Welsh Indices of Multiple Deprivation. RESULTS Survival was negatively associated with area-based deprivation irrespective of the type analysed, although a trend from least to most deprived was not always observed. Socioeconomic differences were present according to individually-measured socioeconomic groups although there was an absence of a consistent 'gradient' in survival. The magnitude of differentials was similar for area-based and individually-derived measures of deprivation, which was unexpected. CONCLUSION These unique data suggest that the socioeconomic influence of 'person' is different to that of 'place' with respect to cancer outcomes. This has implications for health policy aimed at reducing inequalities. Further research could consider the separate and additional influence of area-based deprivation over individual-level characteristics (contextual effects) as well as investigate the geographic, socioeconomic and healthcare-related characteristics of areas with poor outcomes in order to inform policy intervention.
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Affiliation(s)
- Laura M Woods
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - Aurélien Belot
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
| | - Iain M Atherton
- School of Health and Social Care, Edinburgh Napier University, Edinburgh, UK
| | - Lucy Ellis-Brookes
- National Cancer Registration and Analysis Service, Public Health England, London, UK
| | - Matthew Baker
- National Cancer Research Institute Consumer Forum, London, UK
| | - Fiona C Ingleby
- Department of Non-Communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
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Mesa-Eguiagaray I, Wild SH, Bird SM, Williams LJ, Brewster DH, Hall PS, Figueroa JD. Breast cancer incidence and survival in Scotland by socio-economic deprivation and tumour subtype. Breast Cancer Res Treat 2022; 194:463-473. [PMID: 35648299 PMCID: PMC9239954 DOI: 10.1007/s10549-022-06632-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/09/2022] [Indexed: 11/04/2022]
Abstract
Background Women from socio-economically deprived areas are less likely to develop and then to survive breast cancer (BC). Whether associations between deprivation and BC incidence and survival differ by tumour molecular subtypes and mode of detection in Scotland are unknown. Methods Data consisted of 62,378 women diagnosed with invasive BC between 2000 and 2016 in Scotland. Incidence rates and time trends were calculated for oestrogen receptor positive (ER+) and negative (ER−) tumours and stratified by the Scottish Index of Multiple Deprivation (SIMD) quintiles and screening status. SIMD is an area-based measure derived across seven domains: income, employment, education, health, access to services, crime and housing. We calculated adjusted hazard ratios (aHR [95% confidence intervals]) for BC death by immunohistochemical surrogates of molecular subtypes for the most versus the least deprived quintile. We adjusted for mode of detection and other confounders. Results In Scotland, screen-detected ER+tumour incidence increased over time, particularly in the least deprived quintile [Average Annual Percentage Change (AAPC) = 2.9% with 95% CI from 1.2 to 4.7]. No marked differences were observed for non-screen-detected ER+tumours or ER− tumours by deprivation. BC mortality was higher in the most compared to the least deprived quintile irrespective of ER status (aHR = 1.29 [1.18, 1.41] for ER+ and 1.27 [1.09, 1.47] for ER− tumours). However, deprivation was associated with significantly higher mortality for luminal A and HER2−enriched tumours (aHR = 1.46 [1.13, 1.88] and 2.10 [1.23, 3.59] respectively) but weaker associations for luminal B and TNBC tumours that were not statistically significant. Conclusions Deprivation is associated with differential BC incidence trends for screen-detected ER+tumours and with higher mortality for select tumour subtypes. Future efforts should evaluate factors that might be associated with reduced survival in deprived populations and monitor progress stratified by tumour subtypes and mode of detection. Supplementary Information The online version contains supplementary material available at 10.1007/s10549-022-06632-1.
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Affiliation(s)
- Ines Mesa-Eguiagaray
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK.
| | - Sarah H Wild
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - Sheila M Bird
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK.,Cambridge University's MRC Biostatistics Unit, Cambridge, UK
| | - Linda J Williams
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - David H Brewster
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK
| | - Peter S Hall
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK.,Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - Jonine D Figueroa
- Usher Institute, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, UK. .,Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK.
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van Maaren MC, Rachet B, Sonke GS, Mauguen A, Rondeau V, Siesling S, Belot A. Socioeconomic status and its relation with breast cancer recurrence and survival in young women in the Netherlands. Cancer Epidemiol 2022; 77:102118. [PMID: 35131686 PMCID: PMC9422085 DOI: 10.1016/j.canep.2022.102118] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/06/2022] [Accepted: 01/27/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Associations between socioeconomic status (SES) and breast cancer survival are most pronounced in young patients. We further investigated the relation between SES, subsequent recurrent events and mortality in breast cancer patients < 40 years. Using detailed data on all recurrences that occur between date of diagnosis of the primary tumor and last observation, we provide a unique insight in the prognosis of young breast cancer patients according to SES. METHODS All women < 40 years diagnosed with primary operated stage I-III breast cancer in 2005 were selected from the nationwide population-based Netherlands Cancer Registry. Data on all recurrences within 10 years from primary tumor diagnosis were collected directly from patient files. Recurrence patterns and absolute risks of recurrence, contralateral breast cancer (CBC) and mortality - accounting for competing risks - were analysed according to SES. Relationships between SES, recurrence patterns and excess mortality were estimated using a multivariable joint model, wherein the association between recurrent events and excess mortality (expected mortality derived from the general population) was included. RESULTS We included 525 patients. The 10-year recurrence risk was lowest in high SES (18.1%), highest in low SES (29.8%). Death and CBC as first events were rare. In high, medium and low SES 13.2%, 15.3% and 19.1% died following a recurrence. Low SES patients had shorter median time intervals between diagnosis, first recurrence and 10-year mortality (2.6 and 2.7 years, respectively) compared to high SES (3.5 and 3.3 years, respectively). In multivariable joint modeling, high SES was significantly related to lower recurrence rates over 10-year follow-up, compared to low SES. A strong association between the recurrent event process and excess mortality was found. CONCLUSIONS High SES is associated with lower recurrence risks, less subsequent events and better prognosis after recurrence over 10 years than low SES. Breast cancer risk factors, adjuvant treatment adherence and treatment of recurrence may possibly play a role in this association.
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Affiliation(s)
- Marissa C van Maaren
- Department of Research and Development, Netherlands Comprehensive Cancer Organisation, Utrecht, The Netherlands; Department of Health Technology and Services Research, Faculty of Behavioural, Management and Social Sciences, Technical Medical Centre, University of Twente, Enschede, The Netherlands.
| | - Bernard Rachet
- Inequalities in Cancer Outcomes Network (ICON), Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.
| | - Gabe S Sonke
- Department of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands.
| | - Audrey Mauguen
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, United States.
| | - Virginie Rondeau
- INSERM U1219, Biostatistics team, University of Bordeaux, Bordeaux, France.
| | - Sabine Siesling
- Department of Research and Development, Netherlands Comprehensive Cancer Organisation, Utrecht, The Netherlands; Department of Health Technology and Services Research, Faculty of Behavioural, Management and Social Sciences, Technical Medical Centre, University of Twente, Enschede, The Netherlands.
| | - Aurélien Belot
- Inequalities in Cancer Outcomes Network (ICON), Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.
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Ethnic, racial and socioeconomic disparities in breast cancer survival in two Brazilian capitals between 1996 and 2012. Cancer Epidemiol 2021; 75:102048. [PMID: 34700284 DOI: 10.1016/j.canep.2021.102048] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/11/2021] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To study the impact of socio-economic status and ethno-racial strata on excess mortality hazard and net survival of women with breast cancer in two Brazilian state capitals. METHOD We conducted a survival analysis with individual data from population-based cancer registries including women with breast cancer diagnosed between 1996 and 2012 in Aracaju and Curitiba. The main outcomes were the excess mortality hazard (EMH) and net survival. The associations of age, year of diagnosis, disease stage, race/skin colour and socioeconomic status (SES) with the excess mortality hazard and net survival were analysed using multi-level spline regression models, modelled as cubic splines with knots at 1 and 5 years of follow-up. RESULTS A total of 2045 women in Aracaju and 7872 in Curitiba were included in the analyses. The EMH was higher for women with lower SES and for black and brown women in both municipalities. The greatest difference in excess mortality was seen between the most deprived women and the most affluent women in Curitiba, hazard ratio (HR) 1.93 (95%CI 1.63-2.28). For race/skin colour, the greatest ratio was found in Curitiba (HR 1.35, 95%CI 1.09-1.66) for black women compared with white women. The most important socio-economic difference in net survival was seen in Aracaju. Age-standardised net survival at five years was 55.7% for the most deprived women and 67.2% for the most affluent. Net survival at eight years was 48.3% and 61.0%, respectively. Net survival in Curitiba was higher than in Aracaju in all SES groups." CONCLUSION Our findings suggest the presence of contrasting breast cancer survival expectancy in Aracaju and Curitiba, highlighting regional inequalities in access to health care. Lower survival among brown and black women, and those in lower SES groups indicates that early detection, early diagnosis and timely access to treatment must be prioritized to reduce inequalities in outcome among Brazilian women.
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7
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Poiseuil M, Tron L, Woronoff AS, Trétarre B, Dabakuyo-Yonli TS, Fauvernier M, Roche L, Dejardin O, Molinié F, Launoy G. How do age and social environment affect the dynamics of death hazard and survival in patients with breast or gynecological cancer in France? Int J Cancer 2021; 150:253-262. [PMID: 34520579 DOI: 10.1002/ijc.33803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 07/22/2021] [Accepted: 08/04/2021] [Indexed: 11/07/2022]
Abstract
Several studies have investigated the association between net survival (NS) and social inequalities in people with cancer, highlighting a varying influence of deprivation depending on the type of cancer studied. However, few of these studies have accounted for the effect of social inequalities over the follow-up period, and/or according to the age of the patients. Thus, using recent and more relevant statistical models, we investigated the effect of social environment on NS in women with breast or gynecological cancer in France. The data were derived from population-based cancer registries, and women diagnosed with breast or gynecological cancer between 2006 and 2009 were included. We used the European deprivation index (EDI), an aggregated index, to define the social environment of the women included. Multidimensional penalized splines were used to model excess mortality hazard. We observed a significant effect of the EDI on NS in women with breast cancer throughout the follow-up period, and especially at 1.5 years of follow-up in women with cervical cancer. Regarding corpus uteri and ovarian cancer patients, the effect of deprivation on NS was less pronounced. These results highlight the impact of social environment on NS in women with breast or gynecological cancer in France thanks to a relevant statistical approach, and identify the follow-up periods during which the social environment may have a particular influence. These findings could help investigate targeted actions for each cancer type, particularly in the most deprived areas, at the time of diagnosis and during follow-up.
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Affiliation(s)
- Marie Poiseuil
- Univ. Bordeaux, Gironde General Cancer Registry, Bordeaux, France.,Inserm, Bordeaux Population Health, Research Center U1219, Team EPICENE, Bordeaux, France
| | - Laure Tron
- 'ANTICIPE' U1086 INSERM-UCN, Normandie Université UNICAEN, Centre François Baclesse, Caen, France
| | - Anne-Sophie Woronoff
- Doubs Cancer Registry, Besançon University Hospital, Besançon, France.,Research Unit EA3181, University of Burgundy Franche-Comté, Besançon, France.,French Network of Cancer Registries (FRANCIM), Toulouse, France
| | - Brigitte Trétarre
- French Network of Cancer Registries (FRANCIM), Toulouse, France.,Hérault Cancer Registry, Montpellier, France
| | - Tienhan Sandrine Dabakuyo-Yonli
- French Network of Cancer Registries (FRANCIM), Toulouse, France.,Breast and Gynecologic Cancer Registry of Côte d'Or, Georges Francois Leclerc Comprehensive Cancer Centre, Dijon, France.,Epidemiology and Quality of Life Research Unit, INSERM U1231, Dijon, France
| | - Mathieu Fauvernier
- Hospices Civils de Lyon, Pôle Santé Publique, Service de Biostatistique - Bioinformatique, Lyon, France.,Lyon University, Lyon 1 University, CNRS, UMR 5558, Biometrics and Evolutionary Biology Laboratory, Biostatistics and Health Team, Villeurbanne, France
| | - Laurent Roche
- Hospices Civils de Lyon, Pôle Santé Publique, Service de Biostatistique - Bioinformatique, Lyon, France.,Lyon University, Lyon 1 University, CNRS, UMR 5558, Biometrics and Evolutionary Biology Laboratory, Biostatistics and Health Team, Villeurbanne, France
| | - Olivier Dejardin
- 'ANTICIPE' U1086 INSERM-UCN, Normandie Université UNICAEN, Centre François Baclesse, Caen, France.,Research Department, Caen University Hospital Centre, Caen, France
| | - Florence Molinié
- French Network of Cancer Registries (FRANCIM), Toulouse, France.,Loire-Atlantique/Vendée Cancer Registry, Nantes, France.,SIRIC-ILIAD, INCA-DGOS-Inserm_12558, CHU Nantes, Nantes, France
| | - Guy Launoy
- 'ANTICIPE' U1086 INSERM-UCN, Normandie Université UNICAEN, Centre François Baclesse, Caen, France.,French Network of Cancer Registries (FRANCIM), Toulouse, France.,Research Department, Caen University Hospital Centre, Caen, France
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8
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Woods LM, Rachet B, Morris M, Bhaskaran K, Coleman MP. Are socio-economic inequalities in breast cancer survival explained by peri-diagnostic factors? BMC Cancer 2021; 21:485. [PMID: 33933034 PMCID: PMC8088027 DOI: 10.1186/s12885-021-08087-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 03/23/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Patients living in more deprived localities have lower cancer survival in England, but the role of individual health status at diagnosis and the utilisation of primary health care in explaining these differentials has not been widely considered. We set out to evaluate whether pre-existing individual health status at diagnosis and primary care consultation history (peri-diagnostic factors) could explain socio-economic differentials in survival amongst women diagnosed with breast cancer. METHODS We conducted a retrospective cohort study of women aged 15-99 years diagnosed in England using linked routine data. Ecologically-derived measures of income deprivation were combined with individually-linked data from the English National Cancer Registry, Clinical Practice Research Datalink (CPRD) and Hospital Episodes Statistics (HES) databases. Smoking status, alcohol consumption, BMI, comorbidity, and consultation histories were derived for all patients. Time to breast surgery was derived for women diagnosed after 2005. We estimated net survival and modelled the excess hazard ratio of breast cancer death using flexible parametric models. We accounted for missing data using multiple imputation. RESULTS Net survival was lower amongst more deprived women, with a single unit increase in deprivation quintile inferring a 4.4% (95% CI 1.4-8.8) increase in excess mortality. Peri-diagnostic co-variables varied by deprivation but did not explain the differentials in multivariable analyses. CONCLUSIONS These data show that socio-economic inequalities in survival cannot be explained by consultation history or by pre-existing individual health status, as measured in primary care. Differentials in the effectiveness of treatment, beyond those measuring the inclusion of breast surgery and the timing of surgery, should be considered as part of the wider effort to reduce inequalities in premature mortality.
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Affiliation(s)
- Laura M Woods
- Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel St, London, WC1E 7HT, UK.
| | - Bernard Rachet
- Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel St, London, WC1E 7HT, UK
| | - Melanie Morris
- Department of Health Services Research and Policy, Faculty of Public Health and Policy London School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK
| | - Krishnan Bhaskaran
- Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel St, London, WC1E 7HT, UK
| | - Michel P Coleman
- Department of Non-Communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel St, London, WC1E 7HT, UK
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9
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Afshar N, English DR, Milne RL. Factors Explaining Socio-Economic Inequalities in Cancer Survival: A Systematic Review. Cancer Control 2021; 28:10732748211011956. [PMID: 33929888 PMCID: PMC8204531 DOI: 10.1177/10732748211011956] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/06/2021] [Accepted: 03/31/2021] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND There is strong and well-documented evidence that socio-economic inequality in cancer survival exists within and between countries, but the underlying causes of these differences are not well understood. METHODS We systematically searched the Ovid Medline, EMBASE, and CINAHL databases up to 31 May 2020. Observational studies exploring pathways by which socio-economic position (SEP) might causally influence cancer survival were included. RESULTS We found 74 eligible articles published between 2005 and 2020. Cancer stage, other tumor characteristics, health-related lifestyle behaviors, co-morbidities and treatment were reported as key contributing factors, although the potential mediating effect of these factors varied across cancer sites. For common cancers such as breast and prostate cancer, stage of disease was generally cited as the primary explanatory factor, while co-morbid conditions and treatment were also reported to contribute to lower survival for more disadvantaged cases. In contrast, for colorectal cancer, most studies found that stage did not explain the observed differences in survival by SEP. For lung cancer, inequalities in survival appear to be partly explained by receipt of treatment and co-morbidities. CONCLUSIONS Most studies compared regression models with and without adjusting for potential mediators; this method has several limitations in the presence of multiple mediators that could result in biased estimates of mediating effects and invalid conclusions. It is therefore essential that future studies apply modern methods of causal mediation analysis to accurately estimate the contribution of potential explanatory factors for these inequalities, which may translate into effective interventions to improve survival for disadvantaged cancer patients.
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Affiliation(s)
- Nina Afshar
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Cancer Health Services Research Unit, Centre for Health Policy, School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Dallas R. English
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Roger L. Milne
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Melbourne, Victoria, Australia
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10
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Rosskamp M, Verbeeck J, Sass V, Gadeyne S, Verdoodt F, De Schutter H. Social Inequalities in Cancer Survival in Belgium: A Population-Based Cohort Study. Cancer Epidemiol Biomarkers Prev 2020; 30:45-52. [PMID: 33082205 DOI: 10.1158/1055-9965.epi-20-0721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/28/2020] [Accepted: 10/09/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Socioeconomic status (SES) is an important factor in cancer survival; however, results are heterogeneous and linked to characteristics of the study population and health care system. This population-based cohort study evaluates the association between individual-level socioeconomic and demographic factors and cancer survival for the first time in Belgium. METHODS From the Belgian Cancer Registry, we identified 109,591 patients diagnosed between 2006 and 2013 with one of eight common cancer types. Information on treatment, socioeconomic parameters, and vital status were retrieved from multiple data sources and linked using a unique personal identification number. The outcome was 5-year observed survival. Associations between survival and socioeconomic and demographic factors were assessed using multivariable Cox proportional-hazard regression models. RESULTS Lower income, unemployment, and living alone were all associated with worse cancer survival. These associations were most pronounced for certain lifestyle-related cancer types (e.g., head and neck cancers) and those with good to moderate prognosis (e.g., colorectal and female breast cancer). CONCLUSIONS These results indicate that, despite a comprehensive and nationwide health insurance program in which equity in rights and access to health care are pursued, SES is associated with disparities in cancer survival in Belgium. IMPACT This population-based study with individual-level socioeconomic information of more than 100,000 patients with cancer identifies patient groups that may be at highest risk for socioeconomic disparities in cancer survival. Reasons behind the observed disparities are multiple and complex and should be further examined. Health policy interventions should consider the observed deprivation gap to plan targeted actions.
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Affiliation(s)
| | | | - Victoria Sass
- Department of Sociology, Interface Demography, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Sociology, University of Washington, Seattle, Washington
| | - Sylvie Gadeyne
- Department of Sociology, Interface Demography, Vrije Universiteit Brussel, Brussels, Belgium
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Afshar N, English DR, Blakely T, Thursfield V, Farrugia H, Giles GG, Milne RL. Differences in cancer survival by area-level socio-economic disadvantage: A population-based study using cancer registry data. PLoS One 2020; 15:e0228551. [PMID: 31999795 PMCID: PMC6992207 DOI: 10.1371/journal.pone.0228551] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/19/2020] [Indexed: 11/23/2022] Open
Abstract
Despite overall improvements in cancer survival due to earlier diagnosis and better treatment, socio-economically disadvantaged people have lower cancer survival than more advantaged people. We aimed to examine differences in cancer survival by area-level socio-economic disadvantage in Victoria, Australia and assess whether these inequalities varied by year of diagnosis, age at diagnosis, time since diagnosis and sex. Cases diagnosed with a first primary cancer in 2001–2015 were identified using the Victorian Cancer Registry and followed to the end of 2016. Five-year net survival and the excess risk of death due to a cancer diagnosis were estimated. People living in more disadvantaged areas had lower five-year survival than residents of less disadvantaged regions for 21 of 29 cancer types: head and neck, oesophagus, stomach, colorectum, anus/anal canal, liver, gallbladder/biliary tract, pancreas, lung, melanoma, connective/soft tissue, female breast, ovary, prostate, kidney, bladder, brain and central nervous system, unknown primary, non-Hodgkin lymphoma, multiple myeloma and leukemia. The observed lower survival in more deprived regions persisted over time, except head and neck cancer, for which the gap in survival has widened. Socio-economic inequalities in survival decreased with increasing age at diagnosis for cancers of connective/soft tissue, bladder and unknown primary. For colorectal cancer, the observed survival disadvantage in lower socio-economic regions was greater for men than for women, while for brain and central nervous system tumours, it was larger for women. Cancer survival is generally lower for residents of more socio-economically disadvantaged areas. Identifying the underlying reasons for these inequalities is important and may help to identify effective interventions to increase survival for underprivileged cancer patients.
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Affiliation(s)
- Nina Afshar
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- * E-mail:
| | - Dallas R. English
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Tony Blakely
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Vicky Thursfield
- Victorian Cancer Registry, Cancer Council Victoria, Melbourne, Victoria, Australia
| | - Helen Farrugia
- Victorian Cancer Registry, Cancer Council Victoria, Melbourne, Victoria, Australia
| | - Graham G. Giles
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
| | - Roger L. Milne
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, Victoria, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
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Boyce K, White C, Hunt P, Abel N, James Z, Micic T, Gomez K. Inequalities in health? An update on the effect of social deprivation for patients with breast cancer in South East Wales. Surgeon 2019; 17:88-96. [DOI: 10.1016/j.surge.2018.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 05/17/2018] [Accepted: 05/23/2018] [Indexed: 02/03/2023]
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Exarchakou A, Rachet B, Belot A, Maringe C, Coleman MP. Impact of national cancer policies on cancer survival trends and socioeconomic inequalities in England, 1996-2013: population based study. BMJ 2018; 360:k764. [PMID: 29540358 PMCID: PMC5850596 DOI: 10.1136/bmj.k764] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/02/2018] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To assess the effectiveness of the NHS Cancer Plan (2000) and subsequent national cancer policy initiatives in improving cancer survival and reducing socioeconomic inequalities in survival in England. DESIGN Population based cohort study. SETTING England. POPULATION More than 3.5 million registered patients aged 15-99 with a diagnosis of one of the 24 most common primary, malignant, invasive neoplasms between 1996 and 2013. MAIN OUTCOME MEASURES Age standardised net survival estimates by cancer, sex, year, and deprivation group. These estimates were modelled using regression model with splines to explore changes in the cancer survival trends and in the socioeconomic inequalities in survival. RESULTS One year net survival improved steadily from 1996 for 26 of 41 sex-cancer combinations studied, and only from 2001 or 2006 for four cancers. Trends in survival accelerated after 2006 for five cancers. The deprivation gap observed for all 41 sex-cancer combinations among patients with a diagnosis in 1996 persisted until 2013. However, the gap slightly decreased for six cancers among men for which one year survival was more than 65% in 1996, and for cervical and uterine cancers, for which survival was more than 75% in 1996. The deprivation gap widened notably for brain tumours in men and for lung cancer in women. CONCLUSIONS Little evidence was found of a direct impact of national cancer strategies on one year survival, and no evidence for a reduction in socioeconomic inequalities in cancer survival. These findings emphasise that socioeconomic inequalities in survival remain a major public health problem for a healthcare system founded on equity.
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Affiliation(s)
- Aimilia Exarchakou
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - Bernard Rachet
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - Aurélien Belot
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - Camille Maringe
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | - Michel P Coleman
- Cancer Survival Group, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
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Davies H, Marcu A, Vedsted P, Whitaker KL. Is lower symptom recognition associated with socioeconomic inequalities in help-seeking for potential breast cancer symptoms? Psychooncology 2018; 27:626-632. [PMID: 28940942 DOI: 10.1002/pon.4557] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/16/2017] [Accepted: 09/13/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Socioeconomic inequalities in recognising signs and symptoms of cancer may result in inequalities in timely help-seeking and subsequent prognosis of breast cancer. We explored the mediating role of symptom attribution and concern on the relationship between level of education and help-seeking for potential breast cancer symptoms. METHODS Women aged ≥47 years (n = 961) were purposively recruited (by education) to complete an online vignette-based survey that included nipple rash and axillary lump (in separate vignettes) as potential symptoms of breast cancer. Women completed questions relating to medical help-seeking (yes/no), cancer attribution, symptom concern, cancer avoidance, family history, and demographics. RESULTS Women with low education and mid education attributed nipple rash less often to cancer (26% and 27% mentioned cancer) than women with a degree or higher (40%). However, women with a degree or higher (63%) or mid education (64%) were less likely to anticipate seeking help for the nipple rash than women with no formal qualifications (73%). This association was statistically significant in the 60- to 69-year-old age group. There was no significant association between education and help-seeking for axillary lump. Mediation analysis adjusting for potential confounders confirmed that the association between education and help-seeking for nipple rash was fully mediated by symptom concern. CONCLUSIONS Socioeconomic inequalities in stage at diagnosis and survival of breast cancer may not always be explained by lower likelihood of suspecting cancer and subsequent impact on help-seeking. Reducing inequalities in stage at diagnosis will involve understanding a broader range of bio-psycho-social factors (eg, comorbidities and healthcare system factors).
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Affiliation(s)
- Hilary Davies
- School of Health Sciences, University of Surrey, Guildford, UK
| | - Afrodita Marcu
- School of Health Sciences, University of Surrey, Guildford, UK
| | - Peter Vedsted
- Research Unit for General Practice, Research Centre for Cancer Diagnosis in Primary Care (CaP), Faculty of Health, Aarhus University, Aarhus, Denmark
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Lyle G, Hendrie GA, Hendrie D. Understanding the effects of socioeconomic status along the breast cancer continuum in Australian women: a systematic review of evidence. Int J Equity Health 2017; 16:182. [PMID: 29037209 PMCID: PMC5644132 DOI: 10.1186/s12939-017-0676-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 10/03/2017] [Indexed: 12/31/2022] Open
Abstract
Background Globally, the provision of equitable outcomes for women with breast cancer is a priority for governments. However, there is growing evidence that a socioeconomic status (SES) gradient exists in outcomes across the breast cancer continuum – namely incidence, diagnosis, treatment, survival and mortality. This systematic review describes this evidence and, because of the importance of place in defining SES, findings are limited to the Australian experience. Methods An on-line search of PubMed and the Web of Science identified 44 studies published since 1995 which examined the influence of SES along the continuum. The critique of studies included the study design, the types and scales of SES variable measured, and the results in terms of direction and significance of the relationships found. To aid in the interpretation of results, the findings were discussed in the context of a systems dynamic feedback diagram. Results We found 67 findings which reported 107 relationships between SES within outcomes along the continuum. Results suggest no differences in the participation in screening by SES. Higher incidence was reported in women with higher SES whereas a negative association was reported between SES and diagnosis. Associations with treatment choice were specific to the treatment choice undertaken. Some evidence was found towards greater survival for women with higher SES, however, the evidence for a SES relationship with mortality was less conclusive. Conclusions In a universal health system such as that in Australia, evidence of an SES gradient exists, however, the strength and direction of this relationship varies along the continuum. This is a complex relationship and the heterogeneity in study design, the SES indicator selected and its representative scale further complicates our understanding of its influence. More complex multilevel studies are needed to better understand these relationships, the interactions between predictors and to reduce biases introduced by methodological issues.
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Affiliation(s)
- Greg Lyle
- Centre for Population Health Research, Curtin University, Perth, Australia.
| | | | - Delia Hendrie
- School of Public Health, Curtin University, Perth, Australia
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Introduction of an organised programme and social inequalities in mammography screening: A 22-year population-based study in Geneva, Switzerland. Prev Med 2017; 103:49-55. [PMID: 28778819 DOI: 10.1016/j.ypmed.2017.07.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 06/28/2017] [Accepted: 07/24/2017] [Indexed: 12/15/2022]
Abstract
In developed countries, breast cancer mortality has decreased during the last decades due to, at least partially, the advent of mammography screening. Organised programmes aim, among other objectives, to increase participation and decrease social inequalities in screening access. We aimed to characterise the evolution of socioeconomic disparities in mammography screening before and after the implementation of an organised programme in Geneva, Switzerland. We included 5345 women, aged 50-74years, without past history of breast cancer who participated in the cross-sectional Bus Santé study, between 1992 and 2014. Outcome measures were: 1) never had a mammography (1992-2014) and 2) never had a mammography or not screened in the two years before being surveyed (subgroup analysis, 2007-2014). Educational attainment was divided in three groups (primary, secondary and tertiary) and period in two (before/after introduction of a screening programme in 1999). We calculated measures of relative and absolute change, including the relative (RII) and slope (SII) indices of social inequality adjusted for age and nationality. We compared the prevalence of screening before and after screening programme implementation using Poisson models. The proportion of unscreened women decreased during the study period from 30.5% to 3.6%. Lower educated women were more frequently unscreened (RII=2.39, p<0.001; SII=0.10, p<0.001). Organised screening decreased the proportion of unscreened women independently of education (prevalence ratiobefore vs. after=4.41, p<0.001), but absolute and relative inequalities persisted (RII=2.11, p=0.01; SII=0.04, p=0.01). Introduction of an organised programme increased women's adherence to mammography screening but did not eliminate social disparities in screening participation.
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