Years of potential life lost
![]() | This article may be confusing or unclear to readers. In particular, Examples, instead of using the YPLL as defined, show the value YPLL × 100000 or use different undefined terms such as 'Person Years Lost' or YLL. (May 2016) |
Years of potential life lost (YPLL) or potential years of life lost (PYLL) is an estimate of the average years a person would have lived if they had not died prematurely.[1] It is, therefore, a measure of premature mortality. As an alternative to death rates, it is a method that gives more weight to deaths that occur among younger people. An alternative is to consider the effects of both disability and premature death using disability adjusted life years.
Calculation
[edit]To calculate the years of potential life lost, the analyst has to set an upper reference age. The reference age should correspond roughly to the life expectancy of the population under study. In the developed world, this is commonly set at age 75, but it is essentially arbitrary. Thus, PYLL should be written with respect to the reference age used in the calculation: e.g., PYLL[75].
PYLL can be calculated using individual level data or using age grouped data.[2]
Briefly, for the individual method, each person's PYLL is calculated by subtracting the person's age at death from the reference age. If a person is older than the reference age when they die, that person's PYLL is set to zero (i.e., there are no "negative" PYLLs). In effect, only those who die before the reference age are included in the calculation. Some examples:
- Reference age = 75; Age at death = 60; PYLL[75] = 75 − 60 = 15
- Reference age = 75; Age at death = 6 months; PYLL[75] = 75 − 0.5 = 74.5
- Reference age = 75; Age at death = 80; PYLL[75] = 0 (age at death greater than reference age)
To calculate the PYLL for a particular population in a particular year, the analyst sums the individual PYLLs for all individuals in that population who died in that year. This can be done for all-cause mortality or for cause-specific mortality.
Significance
[edit]In the developed world, mortality counts and rates tend to emphasise the most common causes of death in older people because the risk of death increases with age. Because YPLL gives more weight to deaths among younger people, it is the favoured metric among those who wish to draw attention to those causes of death that are more common in younger people. Some researchers say that this measurement should be considered by governments when they decide how best to divide up scarce resources for research.[3]
For example, in most of the developed world, heart disease and cancer are the leading causes of death, as measured by the number (or rate) of deaths. For this reason, heart disease and cancer tend to get a lot of attention (and research funding). However, one might argue that everyone has to die of something eventually, and so public health efforts should be more explicitly directed at preventing premature death. When PYLL is used as an explicit measure of premature death, then injuries and infectious diseases, become more important. While the most common cause of death of young people aged 5 to 40 is injury and poisoning in the developed world, because relatively few young people die, the principal causes of lost years remain cardiovascular disease and cancer.[4]
By main cause of death in the United States of America
[edit]![]() | The examples and perspective in this section deal primarily with United States and do not represent a worldwide view of the subject. (March 2022) |
![]() | This section needs expansion. You can help by adding to it. (March 2022) |
Cause of premature death | Person-years lost |
---|---|
Cancer | 8.6 million |
Heart disease and strokes | 8.8 million |
Accidents and other injuries | 5.9 million |
All other causes | 13.6 million |
Cause of premature death | Person-years lost |
---|---|
(Use/Accessibility/... of) firearms | 1.42 million[6][7] |
Motor vehicle crashes | 1.34 million[7] |
All other causes |
A study suggests the global "mean loss of life expectancy" (LLE) from all forms of direct violence was about 0.3 years, while air pollution accounted for about 2.9 years in 2015.[8]
By country
[edit]![]() | This section needs to be updated.(May 2018) |
Here is a table of YPLL for all causes (ages 0–69, per 100,000) with the most recent available data from the OECD:[1]
Rank | Country | Female YPLL | Male YPLL | Date |
---|---|---|---|---|
1 | ![]() | 4831 | 13225 | 2015 |
2 | ![]() | 6120 | 11427 | 2016 |
3 | ![]() | 4460 | 12372 | 2017 |
4 | ![]() | 4589 | 9547 | 2017 |
5 | ![]() | 3863 | 9626 | 2016 |
6 | ![]() | 4862 | 8265 | 2016 |
7 | ![]() | 3729 | 9290 | 2016 |
8 | ![]() | 4131 | 7262 | 2016 |
9 | ![]() | 3660 | 6509 | 2016 |
10 | ![]() | 3083 | 6555 | 2017 |
11 | ![]() | 2776 | 5780 | 2016 |
12 | ![]() | 2630 | 5723 | 2015 |
13 | ![]() | 3292 | 5096 | 2016 |
14 | ![]() | 2775 | 5621 | 2015 |
15 | ![]() | 2972 | 5312 | 2016 |
16 | ![]() | 2607 | 5761 | 2016 |
17 | ![]() | 3197 | 5002 | 2015 |
18 | ![]() | 2963 | 5197 | 2016 |
19 | ![]() | 2558 | 5451 | 2016 |
20 | ![]() | 3075 | 4776 | 2015 |
21 | ![]() | 2606 | 4736 | 2017 |
22 | ![]() | 2800 | 4525 | 2015 |
23 | ![]() | 3019 | 4075 | 2016 |
24 | ![]() | 2634 | 4460 | 2016 |
25 | ![]() | 2207 | 4709 | 2016 |
26 | ![]() | 2473 | 4190 | 2016 |
27 | ![]() | 2198 | 4391 | 2016 |
28 | ![]() | 2364 | 4190 | 2015 |
29 | ![]() | 2508 | 3975 | 2016 |
30 | ![]() | 2235 | 4191 | 2017 |
31 | ![]() | 2476 | 3895 | 2016 |
32 | ![]() | 2231 | 3957 | 2016 |
33 | ![]() | 2144 | 4015 | 2016 |
34 | ![]() | 2369 | 3614 | 2016 |
Australia
[edit]The report of the NSW Chief Medical Officer in 2002 indicates that cardiovascular disease (32.7% (of total Males Years of Life Lost due to premature mortality) and 36.6% of females YLL) and malignant neoplasms (27.5% of Males YLL and 31.2% of Females YLL) are the main causes of lost years [9]
When disability adjusted life years are considered, cancer (25.1/1,000), cardiovascular disease (23.8/1,000), mental health issues (17.6/1,000), neurological disorders (15.7/1,000), chronic respiratory disease (9.4/1,000) and diabetes (7.2/1,000) are the main causes of good years of expected life lost to disease or premature death.[10] The dramatic difference is in the greater number of years of disability caused mental illness and neurological issues and by diabetes.[citation needed]
See also
[edit]References
[edit]- ^ Gardner JW; Sanborn JS (1976). "Years of potential life lost (YPLL)—what does it measure?". Comparative Biochemistry and Physiology. A, Comparative Physiology. 53 (4): 323–6. doi:10.1016/s0300-9629(76)80148-x. PMID 3312.
- ^ Association of Public Health Epidemiologists in Ontario. "Calculating Potential Years of Life Lost (PYLL)". Archived from the original on July 6, 2011. Retrieved 2008-05-13.
- ^ Burnet NG, Jefferies SJ, Benson RJ, Hunt DP, Treasure FP (January 2005). "Years of life lost (YLL) from cancer is an important measure of population burden—and should be considered when allocating research funds". Br. J. Cancer. 92 (2): 241–5. doi:10.1038/sj.bjc.6602321. PMC 2361853. PMID 15655548.
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2009-01-21. Retrieved 2009-01-17.
{{cite web}}
: CS1 maint: archived copy as title (link)Page 54 Retrieved 17 January 2009. - ^ National Cancer Institute. "Person-Years of Life Lost". Cancer Trends Progress Report, 2009/2010 Update. Archived from the original on July 1, 2011.
- ^ "Premature deaths from guns expose another toll of the firearms crisis". Georgia Public Broadcasting. Retrieved 16 March 2022.
- ^ a b Klein, Joshua; Prabhakaran, Kartik; Latifi, Rifat; Rhee, Peter (1 February 2022). "Firearms: the leading cause of years of potential life lost". Trauma Surgery & Acute Care Open. 7 (1): e000766. doi:10.1136/tsaco-2021-000766. ISSN 2397-5776. PMC 8819782. PMID 35141422.
- ^ Lelieveld, Jos; Pozzer, Andrea; Pöschl, Ulrich; Fnais, Mohammed; Haines, Andy; Münzel, Thomas (1 September 2020). "Loss of life expectancy from air pollution compared to other risk factors: a worldwide perspective". Cardiovascular Research. 116 (11): 1910–1917. doi:10.1093/cvr/cvaa025. ISSN 0008-6363. PMC 7449554. PMID 32123898.
- ^ "Report of the NSW Chief Health Officer: Years of life lost due to premature mortality (YLL)". Archived from the original on 13 June 2007. Retrieved 2009-01-17. Retrieved=17 January 2009
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2009-01-21. Retrieved 2009-01-17.
{{cite web}}
: CS1 maint: archived copy as title (link)Retrieved=17 January 2009 Page 53