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. 2025 Jul 3;25(1):2375.
doi: 10.1186/s12889-025-23559-6.

Estimating years of life lost due to premature mortality at regional level in France in 2017, using a probabilistic redistribution approach

Affiliations

Estimating years of life lost due to premature mortality at regional level in France in 2017, using a probabilistic redistribution approach

Romana Haneef et al. BMC Public Health. .

Abstract

Background: Years of life lost (YLL) due to premature mortality is an important metric to assess the fatal impact of diseases. The main objectives of this study were to apply the four-step probabilistic method to redistribute ill-defined deaths (IDDs) and to quantify the premature mortality burden at regional level in France for 2017.

Methods: We used the statistical database on medical causes of death derived from death certificate collection and coded by the Center for Epidemiology on Medical Causes of deaths (INSERM-CépiDc). First, we mapped the specific ICD-10 codes that define the underlying cause of death (CoD) to the Global Burden of Disease (GBD) cause list. Second, identified IDDs were redistributed to specific ICD-10 codes. A four-step probabilistic redistribution developed for the Belgium Burden of Disease (BeBOD) study was adopted to fit the French context: redistribution using predefined ICD codes, package redistribution using multiple causes of death data, internal redistribution, and redistribution to all causes. Finally, Standard Expected Years of Life Lost (SEYLL) and age-standardized SEYLL rates (ASYR) were calculated at regional level, using the GBD 2019 reference life table.

Results: In France, 36% of all deaths were IDDs in 2017. The majority was redistributed using predefined ICD codes (14%), followed by the package redistribution using multiple causes of death data (11%), all-cause redistribution (11%) and internal redistribution (< 1%). The total number of SEYLL was 9.6 million for all causes, (4.1 million in females [43%] and 5.5 million in males [57%]). Tracheal, bronchus, and lung cancer ranked first (10%), followed by ischemic heart disease (7%), and Alzheimer's disease and other dementias (6%) in terms of SEYLL. For all causes, we observed the lowest ASYRs in Corse for females (8970 per 100 000) and in Ile-de-France for males (16 109 per 100 000).

Conclusions: We quantified the full mortality burden for the first time in France at regional level, based on a new probabilistic redistribution method developed by researchers from Sciensano before COVID-19 pandemic. These estimates are important for future investigations on the contribution of social inequalities and risk factors to all-cause mortality in France with a focus on regional differences.

Keywords: Cause of death; France; Garbage Code; Ill-defined deaths; Life expectancy; Mortality; Redistribution; YLL; Years of life lost.

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Conflict of interest statement

Declarations. Ethics approval and consent to participate: This study was conducted in accordance with the ethical standards of the Helsinki Declaration of 1975 (revised in 2013). Consent for publication: Not applicable. Competing interests: The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Percentage of IDDs relative to the total number of deaths in each region of France and Belgium, 2017
Fig. 2
Fig. 2
The redistribution method with the percentage of redistributed deaths per step in French mortality database, 2017
Fig. 3
Fig. 3
Number of deaths, level 3 GBD cause, for the top 10 causes of death by the contribution of different redistribution steps, France, 2017
Fig. 4
Fig. 4
Crude number of deaths, level 1 GBD cause by sex and age group after the redistribution of IDDs in France, 2017
Fig. 5
Fig. 5
Distribution of causes of death, level 2 GBD cause by age group and sex in France, 2017
Fig. 6
Fig. 6
Age-standardized years of life lost (ASYRs) (per 100 000 inhabitants), by sex and regions in France in 2017
Fig. 7
Fig. 7
15 Leading causes of premature death ranked by age-standardized years of life lost rate (ASYRs) (per 100 000 inhabitants), level 3 GBD cause, both sexes, Metropolitan France, 2017

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