Patients with cancer who will be cured and projections of complete prevalence in Italy from 2018 to 2030.

BACKGROUND: The number and projections of cancer survivors are necessary to meet the healthcare needs of patients, while data on cure prevalence, that is, the percentage of patients who will not die of cancer by time since diagnosis, are lacking. MATERIALS AND METHODS: Data from Italian cancer registries (duration of registration ranged from 9 to 40 years, with a median of 22 years) covering 47% of the population were used to calculate the limited-duration prevalence, the complete prevalence in 2018, projections to 2030, and cure prevalence, by cancer type, sex, age, and time since diagnosis. RESULTS: A total of 3 347 809 people were alive in Italy in 2018 after a cancer diagnosis, corresponding to 5.6% of the resident population. They will increase by 1.5% per year to 4 012 376 in 2030, corresponding to 6.9% of the resident population, 7.6% of women and ∼22% after age 75 years. In 2030, more than one-half of all prevalent cases (2 million) will have been diagnosed by ≥10 years. Those with breast (1.05 million), prostate (0.56 million), or colorectal cancers (0.47 million) will be 52% of all prevalent patients. Cure prevalence was 86% for all patients alive in 2018 (87% for patients with breast cancer and 99% for patients with thyroid or testicular cancer), increasing with time since diagnosis to 93% for patients alive after 5 years and 96% after 10 years. Among patients who survived at least 5 years, the excess risk of death (1 - cure prevalence) was <5% for patients with most cancer types except for those with cancers of the breast (8.3%), lung (11.1%), kidney (13.2%), and bladder (15.5%). CONCLUSIONS: Study findings encourage the implementation of evidence-based policies aimed at improving long-term clinical follow-up and rehabilitation of people living after cancer diagnosis throughout the course of the disease. Updated estimates of complete prevalence are important to enhance data-driven cancer control planning.

The European study on centralisation of childhood cancer treatment.

BACKGROUND: It is generally agreed to centralise treatment of childhood cancers (CCs). We analysed (1) the degree of centralisation of CCs in European countries and 2) the relations between centralisation and survival. PATIENTS AND METHODS: The analysis comprised 4415 CCs, diagnosed between 2000 and 2007 and followed up to the end of 2013, from Belgium, Bulgaria, Finland, Ireland, the Netherlands and Slovenia. All these countries had national population-based cancer registries and were able to provide information on diagnosis, treatment, treatment hospitals, and survival. Each case was then classified according to whether the patient was treated in a high- or a low-volume hospital among those providing CC treatment. A Cox proportional hazard model was used to calculate the relation between volume category and five-year survival, adjusting by age, sex and diagnostic group. RESULTS: The number of hospitals providing treatment for CCs ranged from six (Slovenia) to slightly more than 40 (the Netherlands and Belgium). We identified a single higher volume hospital in Ireland and in Slovenia, treating 80% and 97% of cases, respectively, and three to five major hospitals in the other countries, treating between 65% and 93% of cases. Outcome was significantly better when primary treatment was given in high-volume hospitals compared to low-volume hospitals for central nervous system tumours (relative risk [RR] = 0.71), haematologic tumours (RR = 0.74) and for all CC combined (RR = 0.83). CONCLUSION: Treatment centralisation is associated with survival benefits and should be further strengthened in these countries. New plans for centralisation should include ongoing evaluation.

Epidemiology of rare cancers and inequalities in oncologic outcomes.

Rare cancers epidemiology is better known compared to the other rare diseases. Thanks to the long history of the European population-based cancer registries and to the EUROCARE huge database, the burden of rare cancers has been estimated the European (EU28) population. A considerable fraction of all cancers is represented by rare cancers (24%). They are a heterogeneous group of diseases, but they share similar problems: uncertainty of diagnosis, lack of therapies, poor research opportunities, difficulties in clinical trials, lack of expertise and of centres of reference. This paper analyses the major epidemiological indicators of frequency (incidence and prevalence) and outcome (5-year survival) of all rare cancers combined and of selected rare cancers that will be in depth treated in this monographic issue. Source of the results is the RARECAREnet search tool, a database publicly available. Disparities both in incidence and survival, and consequently in prevalence of rare cancers were reported across European countries. Major differences were shown in outcome: 5-year relative survival for all rare cancers together, adjusted by age and case-mix, varied from 55% or more (Italy, Germany, Belgium and Iceland) and less than 40% (Bulgaria, Lithuania and Slovakia). Similarly, for all the analyzed rare cancers, a large survival gap was observed between the Eastern and the Nordic and Central European regions. Dramatic geographical variations were assessed for curable cancers like testicular and non epithelial ovarian cancers. Geographical difference in the annual age-adjusted incidence rates for all rare cancers together varied between >140 per 100,000 (Italy, Scotland, France, Germany, and Switzerland) and <100 (Finland, Portugal, Malta, and Poland). Prevalence, the major indicator of public health resources needs, was about 7-8 times larger than incidence. Most of rare cancers require complex surgical treatment, thus a multidisciplinary approach is essential and treatment should be provided in centres of expertise and/or in networks including expert centres. Networking is the most appropriate answer to the issues pertaining to rare cancers. Actually, in Europe, an opportunity to improve outcome and reduce disparities is provided by the creation of the European Reference Networks for rare diseases (ERNs). The Joint Action of rare cancers (JARC) is a major European initiative aimed to support the mission of the ERNs. The role of population based cancer registries still remains crucial to describe rare cancers management and outcome in the real word and to evaluate progresses made at the country and at the European level.

Survival of 86,690 patients with thyroid cancer: A population-based study in 29 European countries from EUROCARE-5.

BACKGROUND: Incidence rates of thyroid cancer (TC) increased in several countries during the last 30 years, while mortality rates remained unchanged, raising important questions for treatment and follow-up of TC patients. This study updates population-based estimates of relative survival (RS) after TC diagnosis in Europe by sex, country, age, period and histology. METHODS: Data from 87 cancer registries in 29 countries were extracted from the EUROCARE-5 dataset. One- and 5-year RS were estimated using the cohort approach for 86,690 adult TC patients diagnosed in 2000-2007 and followed-up to 12/31/2008. RS trends in 1999-2007 and 10-year RS in 2005-2007 were estimated using the period approach. RESULTS: In Europe 2000-2007, 5-year RS after TC was 88% in women and 81% in men. Survival rates varied by country and were strongly correlated (Pearson ρ = 75%) with country-specific incidence rates. Five-year RS decreased with age (in women from >95% at age 15-54 to 57% at age 75+), from 98% in women and 94% in men with papillary TC to 14% in women and 12% in men with anaplastic TC. Proportion of papillary TC varied by country and increased over time, while survival rates were similar across areas and periods. In 1999-2007, 5-year RS increased by five percentage points for all TCs but only by two for papillary and by four for follicular TC. Ten-year RS in 2005-2007 was 89% in women and 79% in men. CONCLUSIONS: The reported increasing TC survival trend and differences by area are mainly explained by the varying histological case-mix of cases.

Estimates of prostate cancer burden in Italy.

Age-standardized incidence rates of prostate cancer (PC) sharply increased during the period 1990-2005 in Italian areas covered by cancer registries, while corresponding mortality rates remained nearly constant. The latest observations have reported on a reversal of the incidence trend with decreasing values after 2005. We provided incidence, mortality, and prevalence estimates at national and geographical area levels, together with time projections up to the year 2020. We applied the MIAMOD method, using as input national mortality data for the years 1970-2010 and population-based survival data for the period of diagnosis (1985-2002). We assumed relative survival of prostate cancer remained constant after the year of diagnosis (2005). The age-standardized incidence rates of PC were estimated to increase during the period 1984-2005, from 31 per 100,000 in 1984 to 93 per 100,000 in 2005. From 2005 onwards, the estimated rates declined to 71 in 2015 and to 62 in 2020. Age-standardized mortality rates slightly increased from 1970 up to about 19 per 100,000 in 1999 and then started to decrease with an estimated reduction of about 2.3% per year. Mortality projections indicated a continuing reduction, with a predicted age-standardized rate of about 12 per 100,000 in 2020. Prevalence was estimated to continuously increase up to a crude prevalence value of 1.2% in the year 2020. The results indicate that the epidemic peak of PC was reached around the year 2005 followed by declining incidence rates, while a substantial decrease in mortality, starting during the early 2000s, is expected to continue during the 2010s.

Life expectancy of colon, breast, and testicular cancer patients: an analysis of US-SEER population-based data.

BACKGROUND: Cancer survivorship is an increasingly important issue in cancer control. Life expectancy of patients diagnosed with breast, colon, and testicular cancers, stratified by age at diagnosis and time since diagnosis, is provided as an indicator to evaluate future mortality risks and health care needs of cancer survivors. PATIENTS AND METHODS: The standard period life table methodology was applied to estimate excess mortality risk for cancer patients diagnosed in 1985-2011 from SEER registries and mortality data of the general US population. The sensitivity of life expectancy estimates on different assumptions was evaluated. RESULTS: Younger patients with colon cancer showed wider differences in life expectancy compared with that of the general population (11.2 years in women and 10.7 in men at age 45-49 years) than older patients (6.3 and 5.8 at age 60-64 years, respectively). Life expectancy progressively increases in patients surviving the first years, up to 4 years from diagnosis, and then starts to decrease again, approaching that of the general population. For breast cancer, the initial drop in life expectancy is less marked, and again with wider differences in younger patients, varying from 8.7 at age 40-44 years to 2.4 at ages 70-74 years. After diagnosis, life expectancy still decreases with time, but less than that in the general population, slowly approaching that of cancer-free women. Life expectancy of men diagnosed with testicular cancer at age 30 years is estimated as 45.2 years, 2 years less than cancer-free men of the same age. The difference becomes 1.3 years for patients surviving the first year, and then slowly approaches zero with increasing survival time. CONCLUSIONS: Life expectancy provides meaningful information on cancer patients, and can help in assessing when a cancer survivor can be considered as cured.

Long-term survival, prevalence, and cure of cancer: a population-based estimation for 818 902 Italian patients and 26 cancer types.

BACKGROUND: Persons living after a cancer diagnosis represent 4% of the whole population in high-income countries. The aim of the study was to provide estimates of indicators of long-term survival and cure for 26 cancer types, presently lacking. PATIENTS AND METHODS: Data on 818 902 Italian cancer patients diagnosed at age 15-74 years in 1985-2005 were included. Proportions of patients with the same death rates of the general population (cure fractions) and those of prevalent patients who were not at risk of dying as a result of cancer (cure prevalence) were calculated, using validated mixture cure models, by cancer type, sex, and age group. We also estimated complete prevalence, conditional relative survival (CRS), time to reach 5- and 10-year CRS >95%, and proportion of patients living longer than those thresholds. RESULTS: The cure fractions ranged from >90% for patients aged <45 years with thyroid and testis cancers to <10% for liver and pancreatic cancers of all ages. Five- or 10-year CRS >95% were both reached in <10 years by patients with cancers of the stomach, colon-rectum, pancreas, corpus and cervix uteri, brain, and Hodgkin lymphoma. For breast cancer patients, 5- and 10-year CRSs reached >95% after 19 and 25 years, respectively, and in 15 and 18 years for prostate cancer patients. Five-year CRS remained <95% for >25 years after cancer diagnosis in patients with liver and larynx cancers, non-Hodgkin lymphoma, myeloma, and leukaemia. Overall, the cure prevalence was 67% for men and 77% for women. Therefore, 21% of male and 31% of female patients had already reached 5-year CRS >95%, whereas 18% and 25% had reached 10-year CRS >95%. CONCLUSIONS: A quarter of Italian cancer patients can be considered cured. This observation has a high potential impact on health planning, clinical practice, and patients' perspective.

Cancer prevalence in United States, Nordic Countries, Italy, Australia, and France: an analysis of geographic variability.

BACKGROUND: The objectives of this study were to quantitatively assess the geographic heterogeneity of cancer prevalence in selected Western Countries and to explore the associations between its determinants. METHODS: For 20 cancer sites, 5-year cancer prevalence, incidence, and survival were observed and age standardised for the mid 2000s in the United States, Nordic European Countries, Italy, Australia, and France. RESULTS: In Italy, 5-year crude prevalence for all cancers was 1.9% in men and 1.7% in women, while it was ∼1.5% in all other countries and sexes. After adjustment for the different age distribution of the populations, cancer prevalence in the United States was higher (20% in men and 10% in women) than elsewhere. For all cancers combined, the geographic heterogeneities were limited, though relevant for specific cancers (e.g., prostate, showing >30% higher prevalence in the United States, or lung, showing >50% higher prevalence in USA women than in other countries). For all countries, the correlations between differences of prevalence and differences of incidence were >0.9, while prevalence and survival were less consistently correlated. CONCLUSION: Geographic differences and magnitude of crude cancer prevalence were more strongly associated with incidence rates, influenced by population ageing, than with survival rates. These estimates will be helpful in allocating appropriate resources.

Cancer prevalence estimates in Europe at the beginning of 2000.

BACKGROUND: Complete cancer prevalence data in Europe have never been updated after the first estimates provided by the EUROPREVAL project and referred to the year 1993. This paper provides prevalence estimates for 16 major cancers in Europe at the beginning of the year 2003. PATIENTS AND METHODS: We estimated complete prevalence by the completeness index method. We used information on cancer patients diagnosed in 1978-2002 with vital status information available up to 31 December 2003, from 76 European cancer registries. RESULTS: About 11.6 millions of Europeans with a history of one of the major considered cancers were alive on 1 January 2003. For breast and prostate cancers, about 1 out of 73 women and 1 out of 160 men were living with a previous diagnosis of breast and prostate cancers, respectively. The demographic variations alone will increase the number of prevalent cases to nearly 13 millions in 2010. CONCLUSIONS: Several factors (early detection, population aging and better treatment) contribute to increase cancer prevalence and push for the need of a continuous monitoring of prevalence indicators to properly plan needs, resource allocation to cancer and for improving health care programs for cancer survivors. Cancer prevalence should be included within the EU official health statistics.

Invasive extramammary Paget's disease and the risk for secondary tumours in Europe.

The aim of this study was to determine the incidence and survival of Extramammary Paget's disease (EMPD) and to describe the possible increased risk of tumours after EMPD. All invasive cases diagnosed between 1990 and 2002 were selected from the RARECARE database. Incidence was expressed in European standardized rates. Relative survival was calculated for the period 1995-1999, with a follow-up until 31st December 2003. Standardized incidence ratios of second primary tumours were calculated to reveal possible increased risk after EMPD. European age standardized Incidence of EMPD within Europe is 0.6 per 1000,000 person years. Five-year relative survival for invasive EMPD was 91.2% (95%CI; 83.5-95.4), 8.6 percent of the EMPD patients developed other malignancies. The highest increased risk of developing a second primary tumour was found in the first year of follow-up (SIR:2.0 95%CI; 1.3-2.9), living in the South European region (SIR:2.3 95%CI; 1.5-3.5) or being female (SIR:1.5 95%CI; 1.1-1.9). Female genital organs displayed greatest increased risk of developing a second primary tumour after EMPD (SIR:15,1 95%CI; 0.38-84.23). Due to the increased risk of a second primary tumour after EMPD a thorough search for other tumours during their follow-up is recommended.

Rare cancers of the head and neck area in Europe.

The RARECARE project has proposed a different and more detailed grouping of cancers, based on localisation and histological type, in order to identify rare entities with clinical meaning. RARECARE gathered data on cancer patients diagnosed from 1978 to 2002 and archived in 76 population-based cancer registries, all of which had vital status information available up to at least 31st December 2003. This study provides incidence, prevalence and survival rates for rare head and neck epithelial (H&N) cancers. Among the rare H&N cancers, those of oral cavity had the highest annual crude incidence rate of 48 per million, followed by oropharynx and 'major salivary glands and salivary gland type tumours' (28 and 13 per million, respectively). Incidence rates of epithelial tumours of nasal cavities, nasopharynx, eye and adnexa and middle ears were all lower than 5 per million. The prevalence for all investigated entities was lower than 35 per 100,000. The 5-year relative survival rates ranged from 40% for epithelial cancer of oropharynx to 85% for epithelial cancer of eye and adnexa. Survival rates were lower for men and for patients aged ≥65 years. With few exceptions, the lowest and highest survival figures were observed for Eastern Europe and Northern Europe, respectively. According to the definition for rare tumours by RARECARE (incidence<6 per 100,000), as well as according to the definition for rare diseases by the European Commission (prevalence<50 per 100,000) the H&N cancers described in this paper should be considered rare and diagnosis and treatment of these cancers should therefore be centralised.

Cancer survival in Spain: estimate for nine major cancers.

BACKGROUND: This study provides estimates of population-based relative survival in Spain for nine major cancers and reports results on cancer survival by region, gender and age group. PATIENTS AND METHODS: Our analysis covered eight Spanish regions, namely, Basque Country, Navarre, Girona, Tarragona, Castellón, Albacete, Murcia and Granada, and included patients with cancer of the colon, rectum, lung, breast, ovary, prostate, testis, melanoma of skin and Hodgkin's lymphoma. Cases diagnosed during the period 1995-99 were followed up until 31 December 2004. For individual records, the maximum likelihood approach was used to estimate 5-year relative survival (5y-RS), with crude and adjusted 5y-RS being calculated. A statistical test was applied to explain significant geographical variations. RESULTS: In the regions studied, the highest 5y-RS ratio was detected for lung cancer (adjusted 5y-RS of 12.4% in Navarre versus 6.1% in Granada) and the lowest for breast cancer (91.3% in Castellón versus 81.2% in Albacete). 5y-RS for the respective cancer types was as follows: colon and rectal, 54.7% and 50.2%, respectively; ovarian, 43% overall, though much lower in the oldest age groups; prostate, 76%, rising to close to 80% in the 45-74 age group, with rates ranging from highest in Girona to lowest in Albacete; testicular, 95%, the type with the best prognosis; and Hodgkin's lymphoma, 85%, rising to 92% among young adults. In the case of melanoma of skin, the sex-related difference in 5y-RS was >10% for women. CONCLUSIONS: Although regional differences were identified for most tumours, these were more marked in lung cancer. Women showed better prognosis. Breast and prostate cancer registered lower survival among young than among middle-aged adults. The worst prognosis was for lung cancer and the best for cutaneous melanoma, with breast, prostate and Hodgkin's lymphoma displaying favourable and colon, rectum and ovary unfavourable prognoses. Identifying regional, gender- and age-related differences affords valuable knowledge for improving cancer care.

Cancer incidence and mortality in Spain: estimates and projections for the period 1981-2012.

BACKGROUND: National indicators of cancer burden are essential information for cancer surveillance and health planning, so that in countries with partial registration coverage and geographically variable risk patterns, such as Spain, this is even more relevant. This article provides estimates of cancer incidence in Spain for all cancers combined, with the single exception of non-melanoma skin cancer, and for major cancer sites over the period 1981-2006, with projections up to 2012. PATIENTS AND METHODS: Estimates were obtained by applying the MIAMOD method, a statistical back-calculation approach, to derive incidence from mortality and relative survival data. RESULTS: During the period 1981-2012, age-standardised incidence rates for all cancers rose from the beginning of the period and started to decline from 2000 onwards among men, and increased across the whole period among women. Differences in incidence trends between men and women might be attributable to the gender-specific case-mix of sites for all cancers, and to differences in risk factors specific to certain cancer sites in men and women, with smoking being the main factor accounting for these differences between the sexes. CONCLUSIONS: Estimates and projections of cancer incidence and mortality show divergent trends in Spain by sex and tumour type. This information is basic for planning and enhancing public health strategies and resources.

Estimating regional cancer burden in countries with partial registration coverage: an application to all malignant neoplasms in Italy over the period 1970-2010.

Regional epidemiological indicators of cancer burden are essential information for cancer surveillance and health resources planning, especially in countries with partial registration coverage and geographically variable risk patterns, such as Italy. This paper presents a methodology to derive cancer incidence and prevalence at the regional and national scale and illustrates its application to all malignant neoplasms in Italy for the period 1970-2010. The method, denoted as MIAMOD, is based on a back-calculation approach and derives cancer-specific morbidity measures by using official mortality data and model-based relative survival from local Cancer Registries data. The output includes time-trends and projections of a complete set of epidemiological indicators, i.e. mortality, incidence and prevalence. Results for all cancers in Italy show different incidence patterns by gender and a pronounced regional variability among men: male incidence is estimated to decrease in almost all northern-central regions, while more stable or even rising trends are estimated in the southern regions. No incidence reduction is expected for women. Prevalence increases country-wide in both sexes. The proposed approach can be applied to derive regional up-to-date time trends of cancer burden indicators in countries with local and sparse cancer registration systems. These estimates are useful for planning health services on a national and regional basis and for highlighting regional differences.

Survival differences between European and US patients with colorectal cancer: role of stage at diagnosis and surgery.

BACKGROUND: Population based colorectal cancer survival among patients diagnosed in 1985-89 was lower in Europe than in the USA (45% v 59% five year relative survival). AIMS: To explain this difference in survival using a new analytic approach for patients diagnosed between 1990 and 1991. SUBJECTS: A total of 2492 European and 11 191 US colorectal adenocarcinoma patients registered by 10 European and nine US cancer registries. METHODS: We obtained clinical information on disease stage, number of lymph nodes examined, and surgical treatment. We analysed three year relative survival, calculating relative excess risks of death (RERs, referent category US patients) adjusted for age, sex, site, surgery, stage, and number of nodes examined, using a new multivariable approach. RESULTS: We found that 85% of European patients and 92% of US patients underwent surgical resection. Three year relative survival was 69% for US patients and 57% for European patients. After adjustment for age, sex, and site, the RER was significantly high in all 10 European populations, ranging from 1.07 (95% confidence interval 0.86-1.32) (Modena, Italy) to 2.22 (1.79-2.76) (Thames, UK). After further adjustment for stage, surgical resection, and number of nodes examined (a determinant of stage), RERs ranged from 0.77 (0.62-0.96) to 1.59 (1.28-1.97). For some European registries the excess risk was small and not statistically significant. CONCLUSIONS: US-Europe survival differences in colorectal cancer are large but seem to be mostly attributable to differences in stage at diagnosis. There are wide variations in diagnostic and surgical practice between Europe and the USA.

Population-based incidence and mortality cancer trends (1986-1997) from the network of Italian cancer registries.

The objective of this study was to analyse incidence and mortality cancer trends in the Italian Network of Cancer Registries (about 8,000,000 inhabitants) during the period 1986-1997. Included were 525,645 newly diagnosed cancers and 269,902 cancer deaths (subjects > 14 years). Joinpoints (points in time where trend significantly changes from linearity) were found and estimated annual percentage changes (EAPC) used to summarize tendencies. Overall cancer incidence increased in both sexes and cancer mortality significantly decreased (since 1991 among men). Lung cancer showed significantly decreasing incidence (EAPC = -1.4%) and mortality (EAPC = -1.6%) among men and increasing trends among women. In women, breast cancer incidence significantly increased (EAPC= +1.7%) and mortality decreased since 1989 (EAPC= -2.0%). Stomach cancer incidence and mortality decreased in both sexes. Prostate incidence sharply increased since 1991 and mortality decreased. Colon cancer incidence increased and rectum mortality decreased significantly in both sexes. Significant increases in incidence were also found for kidney (up to 1991 among men), urinary bladder, skin epithelioma, melanoma, liver (up to 1993 among men), pancreas, mesothelioma, Kaposi's sarcoma (up to 1995 among men), testis, thyroid, non-Hodgkin's lymphomas and multiple myeloma. Mortality significantly decreased for cancers of the oral cavity and pharynx, oesophagus, liver (women), larynx (men), bone, cervix (since 1990), central nervous system, urinary bladder, thyroid, Hodgkin's lymphomas and leukaemias (men). Non-Hodgkin's lymphoma mortality increased in both sexes. In conclusion, most of the changes seen can be explained as the effect of changes in smoking habits and of the extension of secondary prevention activities. The Italian health care system will also have to cope with growing cancer diagnostic and therapeutic needs due to population ageing.

Colon cancer prevalence and estimation of differing care needs of colon cancer patients.

BACKGROUND: Cancer prevalence-the proportion of people in a population with a diagnosis of cancer-includes groups with widely differing cancer care needs. We estimated the proportions of the prevalent colon cancer cases requiring initial care, terminal care and follow-up. PATIENTS AND METHODS: Prevalence by year since diagnosis was estimated from incidence and vital status data on 243,471 colon cancer cases collected by EUROPREVAL from 36 European population-based cancer registries. The proportions of cured and fatal cases were estimated by applying 'cure' survival models to the dataset. The proportion of recurrence-free cases was estimated by analysis of a representative sample of 278 colon cancer patients from the Lombardy Cancer Registry (LCR), northern Italy. RESULTS: The proportions of total prevalence requiring initial care was estimated at 12% in the LCR and 10% in Italy and Europe. Recurrence-free patients formed 89% of the total prevalence in the LCR and 91% in Italy and Europe. Eleven per cent (LCR) and 9% (Italy, Europe) of the total prevalence had recurred and consisted of patients in the terminal phase of their illness. CONCLUSIONS: In 1992, 660,000 people were living with a diagnosis of colon cancer in Europe. We have estimated the proportions of this prevalence requiring particular types health care in the years following diagnosis, providing data useful for planning the allocation of health-care resources.

The EUROCARE-3 database: methodology of data collection, standardisation, quality control and statistical analysis.

The EUROCARE database contains data on 6.5 million cancer patients diagnosed from 1978 to 1994 in populations covered by 67 cancer registries in 22 European countries. The quality-checked entries specify age, sex, diagnosis date, cancer site, morphology, microscopic confirmation and vital status, as well as containing broad indicators of stage. For EUROCARE-3, which refers to diagnoses from 1990 to 1994, 3389 cases with major data problems and 142,525 second or subsequent cancers were removed, leaving more than 2 million cases for analysis. From these data, observed and relative survival for each cancer site and country were calculated at 1, 3 and 5 years from diagnosis. Overall European survival for each cancer site and for all cancers combined were calculated combining country-specific survival figures. Overall, 1.1% of cases were lost to follow-up, 4.2% were known from death certificates only and 1.2% were known at autopsy only. The percentage of microscopically confirmed cases varied with cancer site and country, and was always higher in northern European countries. Comparison of quality indicators for the EUROCARE-3 database with earlier EUROCARE databases indicates that data quality and standardisation have improved.

Life expectancy and cancer survival in the EUROCARE-3 cancer registry areas.

BACKGROUND: Mortality information is essential for estimating relative cancer survival (that excludes deaths from other causes). However, sufficiently detailed mortality data are not available for all areas covered by the cancer registries (CRs) participating in the EUROCARE-3 study. MATERIALS AND METHODS: Mathematical methods were used to construct complete local mortality data (life tables) for each year of age (0-99), for each year (1978-2000) and by sex, from the incomplete life tables provided by CRs, presenting the results as life expectancy at birth (LE). Socio-economic data were obtained from the United Nations (UN) and Organisation for Economic Co-operation and Development (OECD). RESULTS: The time and regional trends in LE provided by our estimates are closely similar to those published by the UN at the country level. According to UN data, LE (men plus women) varied from 70 years in Estonia to almost 79 years in Sweden in the period 1995-1999. LE increased markedly over the 20-year study period in most countries except Estonia and Denmark. LE correlated directly with GDP, national expenditure on health and relative survival for all cancers combined. We found that within-country LE variation was large in some countries (particularly the UK). Sweden, Iceland, Switzerland, and parts of Spain and Italy had high LE; eastern European countries had low LE. CONCLUSIONS: Detailed area-specific life tables are essential for reliable estimation of relative cancer survival and its comparison across populations, since LE varies markedly across Europe. Where not available, life tables can be constructed to the required level of detail using mathematical approaches.