Citation: The PLoS Medicine Editors (2010) Can We Count on Global Health Estimates? PLoS Med 7(11): e1001002. https://doi.org/10.1371/journal.pmed.1001002
Published: November 30, 2010
Copyright: © 2010 PLoS Medicine Editors. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Funding: The authors are each paid a salary by the Public Library of Science, and they wrote this editorial during their salaried time.
Competing interests: The authors' individual competing interests are at http://www.plosmedicine.org/static/editorsInterests.action. PLoS is funded partly through manuscript publication charges, but the PLoS Medicine Editors are paid a fixed salary (their salary is not linked to the number of papers published in the journal).
The PLoS Medicine Editors are Virginia Barbour, Jocalyn Clark, Susan Jones, and Emma Veitch.
Provenance: Written by editorial staff; not externally peer reviewed.
- Byass P (2010) The Imperfect World of Global Health Estimates. PLoS Med 7: e1006. doi:10.1371/journal.pmed.1001006
- Boerma T, Mathers C, Abouzahr C (2010) WHO and Global Health Monitoring: The Way Forward. PLoS Med 7: e373. doi:10.1371/journal.pmed.1000373
- Murray C, Lopez A (2010) Production and Analysis of Health Indicators: The Role of Academia. PLoS Med 7: e1004. doi:10.1371/journal.pmed.1001004
- Sankoh O (2010) Global Health Estimates: Stronger Collaboration Needed With Low- and Middle-Income Countries. PLoS Med 7: e1005. doi:10.1371/journal.pmed.1001005
- Graham W, Adjei S (2010) A Call for Responsible Estimation of Global Health. PLoS Med 7: 1003. doi:10.1371/journal.pmed.1001003
Estimates of global health indicators—which give insight into death and disease rates, document advances in health and development, and help policymakers monitor progress—are a necessary evil. They are absolutely essential to improving global health, but they are always unsatisfyingly imperfect. Estimates are estimates—that is, they are not true measurements of health and death. They rely on often inadequate data to create a best guess. Some estimates are undoubtedly better than others, but even with advanced statistical techniques and complex modeling tools it is often frustratingly difficult to interpret and judge the estimates that result and to have complete confidence in their accuracy.
As such, estimates are often debated, sometimes fiercely. The idea for a cluster of articles on this topic came from Ties Boerma and Colin Mathers at WHO, who submitted an article to PLoS Medicine laying out their reflections on WHO's estimate work following the high-profile publication of maternal and child mortality estimates by an academic group in advance of the UN's own release of estimates. We felt that a range of viewpoints on the burning issues in health indicator estimates, and on the future of the field, would serve readers best, so we commissioned a group of articles to accompany the piece by Boerma and colleagues .
That academic institutions are now in the game of estimate-making, introducing competition in an area that was once the dominion of UN agencies, provides some impetus for the cluster. But the fact that so much has been made of the differences between different estimates is another driver. On the one hand, why does it matter that either 380,000  or 500,000  women die every year trying to give birth—these are both astonishing and deplorable numbers. On the other hand, that national authorities and policymakers working for decades with one set of (UN) numbers might be blind-sided by new, “improved” estimates tracking their country's health and development , means something important is lost in translation and must be explored.
We commissioned articles from several experts to provide insights and opinion on what the estimates mean for global health, how their generation can be improved, and how to move forward with better data, measurement, and coordination. Representing very different institutional and political orientations, the experts nevertheless agree that the debate about health estimates highlights the relative importance of “the global” and “the local.” For example, each commentator emphasizes the importance of improving the quantity and quality of individual health data and of improving the role of local experts at the country level. This suggests that contentiousness about health indicator estimates operates too much at the level of the global and political, and not enough at levels where real data are generated and interpreted.
Medical journals would serve the field best by equally considering original research of both country and global data estimates (following the quality of the science rather than any specific policy agenda), and by publishing incisive commentary and analysis on how these estimates are shaped, fueled, and improved. Since at the very core of the debate about health estimates is the issue of quality, availability, and transparency of data, medical journals could also continue to advocate for data sharing (as PLoS often has), and to support initiatives that call for action on health data—such as the H8 position paper from the eight leading global health agencies published in PLoS Medicine earlier this year . The last thing the field needs is yet more divisions.
The editors thank Rhona MacDonald for comments on an earlier draft of this editorial.
ICMJE authorship criteria read and met: VB JC SJ EV. Wrote the first draft of the paper: JC.
- 1. Byass P (2010) The Imperfect World of Global Health Estimates. PLoS Med 7: e1006.P. Byass2010The Imperfect World of Global Health Estimates.PLoS Med7e1006
- 2. Boerma T, Mathers C, Abouzahr C (2010) WHO and Global Health Monitoring: The Way Forward. PLoS Med 7: e373.T. BoermaC. MathersC. Abouzahr2010WHO and Global Health Monitoring: The Way Forward.PLoS Med7e373
- 3. Murray C, Lopez A (2010) Production and Analysis of Health Indicators: The Role of Academia. PLoS Med 7: e1004.C. MurrayA. Lopez2010Production and Analysis of Health Indicators: The Role of Academia.PLoS Med7e1004
- 4. Sankoh O (2010) Global Health Estimates: Stronger Collaboration Needed With Low- and Middle-Income Countries. PLoS Med 7: e1005.O. Sankoh2010Global Health Estimates: Stronger Collaboration Needed With Low- and Middle-Income Countries.PLoS Med7e1005
- 5. Graham W, Adjei S (2010) A Call for Responsible Estimation of Global Health. PLoS Med 7: 1003.W. GrahamS. Adjei2010A Call for Responsible Estimation of Global Health.PLoS Med71003
- 6. Hogan MC, Foreman KJ, Naghavi M, Ahn SY, Wang M, et al. (2010) Maternal mortality for 181 countries, 1980–2008: A systematic analysis of progress towards Millennium Development Goal 5. Lancet. MC HoganKJ ForemanM. NaghaviSY AhnM. Wang2010Maternal mortality for 181 countries, 1980–2008: A systematic analysis of progress towards Millennium Development Goal 5.Lancet201010.1016/SO140-6736(10)60518-1. 201010.1016/SO140-6736(10)60518-1.
- 7. Hill K, Thomas K, AbouZahr C, Walker N, Say L, et al. (2007) Estimates of maternal mortality worldwide between 1990 and 2005: an assessment of available data. Lancet 370: 1311–1319.K. HillK. ThomasC. AbouZahrN. WalkerL. Say2007Estimates of maternal mortality worldwide between 1990 and 2005: an assessment of available data.Lancet37013111319
- 8. Melgar JD, Melgar AR (2010) New modelled estimates of maternal mortality. Lancet 375: 1963–1964.JD MelgarAR Melgar2010New modelled estimates of maternal mortality.Lancet37519631964
- 9. Qomariyah SN, Anggondowati T (2010) New modelled esimates of maternal mortality. Lancet 375: 1964–1965.SN QomariyahT. Anggondowati2010New modelled esimates of maternal mortality.Lancet37519641965
- 10. Chan M, Kazatchkine M, Lob-Levyt J, Obaid T, Schweizer J, et al. (2010) Meeting the demand for results and accountability: A call for action on health data from eight global health agencies. PLoS Med 7: e1000223.M. ChanM. KazatchkineJ. Lob-LevytT. ObaidJ. Schweizer2010Meeting the demand for results and accountability: A call for action on health data from eight global health agencies.PLoS Med7e1000223