Portugal is a special case
The other European countries that have implemented the RTBF have a reference grid showing special conditions that fall within the law. On one hand these include less severe cancers which have better prognoses and can therefore be considered resolved after a shorter period after the end of treatment. On the other hand, they also define criteria and maximum loadings for other chronic conditions, such as hepatitis C, HIV or leukaemia.
Even though the Portuguese law specifically includes chronic diseases (no information can be collected after two uninterrupted years of efficient treatment in case of aggravated health risk or mitigated disability), there is not yet such a reference grid to guide insurers in applying the law.
The Portuguese Association of Insurers (APS) has created a suggested table for the more benign cancers and viral hepatitis C, following the example of Luxembourg and Belgium, but it remains unclear how to treat other conditions such as diabetes and HIV, resulting in confusion for applicants and the insurance companies.
Recent developments
While the first initiations of the law have been relatively clear-cut and limited, recent advances have been more far-reaching. Even though it is not clearly defined how the law is to be applied, the Portuguese version includes the right to forget chronic illnesses following “effective and continuous treatment for two years”.
With effect of 1 October 2022, the French legislation treats HIV not with a restricted maximum loading, but rather includes it in the non-rateable conditions that will have to be forgotten entirely if the necessary criteria are met.30 Earlier this year, in France the period after which conditions have to be forgotten has been reduced to a maximum of five years for all ages; and medical underwriting for loan insurance with sums assured up to EUR 200,000 has been abolished altogether.31
The Belgian insurance association, Assuralia, has obliged its members to a code of conduct that additionally applies the RTBF to Guaranteed Income insurance, a Disability insurance that pays out in case of prolonged illness or disability to compensate for the difference between the normal salary and the public social security system.32
With these developments and the foreseeable implementation of the law in further countries, we want to comment and discuss the implications of the law for the insurance industry and create a basis for a joint dialogue between representatives from politics, patient groups and insurance that will make it possible to find consensual regulation in countries that are planning to implement the RTBF, or in countries that plan to extend the current legislation.
In order to estimate the risk that insurers will be exposed to with the RTBF, we will in the following provide an overview on cancer risk in general, with a focus on long-term mortality risk and on how the RTBF may affect an insurer’s portfolio.
Part II: Long-term risk of cancer
The number of cancer survivors is increasing
The number of people living after a cancer diagnosis (i. e. prevalent cases) has been increasing for the past 30 years, reaching around 5 % of the total population in several countries.33 This trend is driven by an increasing number of new cancer diagnoses (predominantly due to population ageing) and by improving cancer survival rates associated with better treatment and early diagnosis.
In 2020, there were around 20 million cancer survivors in Europe and about one-third of these are within working age and thus potential candidates to buy insurance cover.34 This growing group of people includes cancer patients who are currently in treatment, patients who are in remission, i. e. who have become cancer‐free but still have a measurable excess risk of recurrence or death, and patients who are considered to be “cured”, as they have reached the same mortality rates as the general population.35
Within the scope of the RTBF, all types of cancer will be accepted at standard rates five or 10 years after concluding treatment. How will the RTBF influence the insurer’s portfolio when risk adjustment measures are no longer possible or permitted only for certain types of insurance covers? Do cancer survivors have significant extra mortality if they have been cancer-free for 10 years and more?
In the following, we will try to give some answers to these questions. First, let us look into medical studies on cancer survival.
Cancer survival depends on different factors
An individual’s life expectancy and survival after a cancer diagnosis is dependent on the age at diagnosis, the type of cancer that was diagnosed, the stage at which the cancer was diagnosed and the type of treatment that the patient received. Consequently, there is a huge variability in cancer survival.
Not only the “cure fraction”, i. e. “the proportion of cancer cases expected to reach the same death rates of the general population” differs between cancer types, but also the “time-to-cure”, defined as the “number of years after cancer diagnosis necessary to eliminate or to make the excess mortality due to cancer negligible”.36
Cancers with a very good prognosis and a short time‑to‑cure
There are several cancer types that, when diagnosed at an early stage, have a particularly good prognosis and a short time-to-cure, for example testicular and thyroid cancers with a cure fraction of 94 % and 98 %, respectively, and a time-to-cure of less than one year after diagnosis.37
Cancers in this group can today be seen as chronic diseases rather than a death sentence and it is therefore legitimate to “forget” them at an earlier stage as defined in the RTBF’s medical grids.
Cancers with a negligible long-term risk
Another group of cancers has been identified, for which the cancer-related “excess mortality became negligible in less than 10 years for patients below 45 years of age with Hodgkin lymphoma, skin melanoma, and cervical cancer”.38 Furthermore, a “negligible excess risk of death within 10 years from diagnosis” has been reported for colorectal cancer patients and younger patients with stomach cancer.39
These cancers do not seem to have a significantly increased mortality after 10 years compared to the general population and it should therefore be legitimate to “forget” them 10 years after concluding treatment.
Cancers that come back many years after diagnosis
There are cancers which have a risk of late recurrence or death even 10 years after diagnosis, e. g. lung cancer with a time-to-cure of more than 10 years, breast cancer with a time-to-cure of 10 to 17 years, or bladder cancer with a time-to-cure of 18 to 20 years.40,41
This group of cancers is relevant for the insurers in the scope of the RTBF as the cancer-related mortality is still elevated 10 years after diagnosis.
Long-term risks of cancer treatment
Cancer treatment is getting more precise, resulting in higher survival rates and less severe long-term effects for cancer survivors. Despite this favourable development, cancer treatment can still be harmful to the body, and cancer survivors can, depending on their treatment, be more prone to develop second cancers and other chronic conditions, including defects of their thyroid gland, diabetes, neurological complications, liver failure, renal disease and heart failure.42
While in older adults (diagnosed at ages 60 to 70), the “negative long-term effects of cancer treatment could eventually be reduced to a minimum”43 long-term effects of cancer treatment seem relevant for childhood cancer survivors. A recent study examined late effects in children and young adults who had a cancer diagnosis before the age of 25 years and were followed for 20 years. The study summarises that “cancer survivors are a heterogeneous group where the extent of late effects differs across cancer subtypes, deprivation status, treatment exposures and chemotherapy drug classes. Compared with community controls, survivors notably had a higher risk of morbidity regardless of their primary cancer diagnosis and deprivation status.”44
This is relevant for the RTBF population as the 10 years will have passed when this age group reaches the typical age of applying for Life insurance in association with a mortgage. Late effects of cancer treatment can still be underwritten in the RTBF, but the original cancer cannot. This is a challenge that is present in underwriters’ daily work in countries where the RTBF already is in force.
Long-term mortality of all cancers combined
The RTBF will not distinguish between different cancer types or cancer stages after a certain time period following the treatment. What is the real long-term mortality risk when we look at all cancers combined?
a) Literature research
There are a few recent studies that evaluate “all cancer” survival or mortality. The authors of an Italian study on cancer patients aged 45 to 80 who were followed for 28 years after their diagnosis conclude that “cancer patients’ life expectancy in the long-term approaches, but seldom reaches, the general population’s life expectancy”.45
Another study on Swedish cancer patients diagnosed at age 60 and followed for 17 years after diagnosis, showed that cancer patients had increased mortality rates compared to the total population in the years after diagnosis. This converged towards the mortality level of the total population five to 10 years after diagnosis, but still did not reach the level of the total population 17 years after diagnosis.46
The elevated mortality of cancer survivors in the long term can be attributed to cancer relapse, second cancers and late effects of cancer treatment.47,48 Furthermore, when lifestyle behaviours that may have contributed to the development of cancer persist (such as smoking and unhealthy diet), these can continue to decrease a patient’s survival in the long term.49,50
However, the cancer-related extra mortality was not quantified in the publications, and to estimate the risk that insurers will be exposed to in the scope of the RTBF, we analysed data from the U. S. Surveillance, Epidemiology and End Results (SEER) Cancer Registries Program (2000–2018).51
b) Actuarial considerations: calculation of cancer patients’ relative mortality one to 18 years after diagnosis
In order to estimate the mortality risk of all cancers combined, we extracted mortality data from the SEER database for cancer patients diagnosed in the years 2000 to 2018.52 The relative mortality of cancer patients was calculated as the ratio of the “observed mortality” of cancer patients to the “expected mortality” of the general population, which provides a measure of the excess mortality experienced by cancer patients.
Statistical analysis was performed using the software “R” and a GLM framework with Tukey Test. A Bonferroni correction for multiple testing was applied to determine significances. More details on data extraction methods and statistical analyses are available upon request.
Relative mortalities for different age bands are shown in Figure 3, as per years after diagnosis. Please note that the x‑axis shows the years after diagnosis and not the years after the end of treatment (which applies to the RTBF). If we suppose that cancer treatment takes around two years, we have to look at the time points seven and 12 years after diagnosis to indicate the time points five and 10 years after finishing treatment, which are relevant for the RTBF.
Figure 3: Relative mortality of all cancer sites combined*
Log-normal y‑axis; 1‑18 years after diagnosis for different age bands. Relative mortality indicates the excess mortality of cancer patients as a factor to the population mortality (dashed line)