First study (2004)
The survey was sponsored by the Center for International Emergency Disaster and Refugee Studies, Johns HopkinsThe most common causes of death before the invasion of Iraq were heart attacks, strokes and other chronic diseases. However, after the invasion, violence was recorded as the primary cause of death and was mainly attributed to coalition forces—with about 95 percent of those deaths caused by bombs or fire from helicopter gunships.
Criticisms and countercriticisms
Some criticisms have focused on the relatively broad 95% confidence intervals (CI95), resulting from the difficulty and scarcity of reliable sources."100,000 Deador 8,000. How many Iraqi civilians have died as a result of the war?"''Lancet'' publications related to criticisms
* 20 November 2004. Criticism and suggestions by peer reviewer ProfessorOther responses to criticism
''Second study (2006)
A second study by some of the same authors was published in October 2006, in ''The Lancet''."Critics say 600,000 Iraqi dead doesn't tally. But pollsters defend methods used in Johns Hopkins study"We estimate that between March 18, 2003, and June, 2006, an additional 654,965 (392,979–942,636) Iraqis have died above what would have been expected on the basis of the pre-invasion crude mortality rate as a consequence of the coalition invasion. Of these deaths, we estimate that 601,027 (426,369–793,663) were due to violence.If accurate, these figures would imply the death of an average 500 people per day, or 2.5% of Iraq's population during the period.Iraqi deaths survey 'was robust'
The survey was conducted between May 20 and July 10Lancet:006 Alec Trevelyan (006) is a fictional character and the main antagonist in the 1995 James Bond film '' GoldenEye'', the first film to feature actor Pierce Brosnan as Bond. Trevelyan is portrayed by actor Sean Bean. The likeness of Bean as Ale ...by eight Iraqi physicians organized through Mustansiriya University in Baghdad. They visited 1,849 randomly selected households that had an average of seven members each. One person in each household was asked about deaths in the 14 months before the invasion and in the period after. The interviewers asked for death certificates 87 percent of the time; when they did, more than 90 percent of households produced certificates.
Only 47 of the sought 50 clusters were included in this analysis. On two occasions, miscommunication resulted in clusters not being visited in Muthanna and Dahuk, and instead being included in other Governorates. In Wassit, insecurity caused the team to choose the next nearest population area, in accordance with the study protocol. Later it was discovered that this second site was actually across the boundary in Baghdad Governorate. These three misattributed clusters were therefore excluded, leaving a final sample of 1849 households in 47 randomly selected clusters.The ''Lancet'' authors based their calculations on an overall, post-invasion, excess mortality rate of 7.8/1000/year. "Pre-invasion mortality rates were 5.5 per 1000 people per year (95% CI 4.3–7.1), compared with 13.3 per 1000 people per year (10.9–16.1) in the 40 months post-invasion." See Table 3 in the ''Lancet'' article. The population number used in the calculation is reported in the ''Lancet'' supplement: "Mortality projections were applied to the 2004 mid-year population estimates (26,112,353) of the surveyed areas (which exclude the governorates of Muthanna and Dahuk, which had been omitted through misattribution) to establish the mortality projections." Of 629 deaths verified and recorded among a sample of 1,849 households incorporating some 12,801 people at the time of the survey, 13% took place in the 14 months before the invasion and 87% in the 40 months afterwards. "The study population at the beginning of the recall period (January 1, 2002) was calculated to be 11 956, and a total of 1474 births and 629 deaths were reported during the study period." The study concluded that the mortality rate per 1,000 population per year in the pre-invasion period was 5.5 (range of 4.3–7.1, using a 95% CI, confidence interval) and in the post-invasion period was 13.3 (95% CI, 10.9–16.1). Excess mortality rate over the pre-invasion period was therefore 7.8 per 1,000 population per year, with violent death accounting for 92% of the increased mortality rate. ''Washington Post'': "Gunshot wounds caused 56 percent of violent deaths, with car bombs and other explosions causing 14 percent, according to the survey results. Of the violent deaths that occurred after the invasion, 31 percent were caused by coalition forces or airstrikes, the respondents said." The study results show an increasing mortality rate throughout the post-invasion periods, with the excess mortality rate for June 2005–June 2006 of 14.2 (95% CI, 8.6–21.5) being nearly 5.5 times the excess mortality rate for March 2003–April 2004 of 2.6 (95% CI, 0.6–4.7). The 2006 study also provides an estimate for the 18-month period following the invasion (March 2003 through September 2004) of 112,000 deaths (95% CI, 69,000–155,000). The authors conclude, "Thus, the data presented here validates our 2004 study, which conservatively estimated an excess mortality of nearly 100,000 as of September, 2004." The authors described the fact that their estimate is over ten times higher than other estimates, such as the
Official reactions
A 12 October 2006 ''"Six hundred thousand or whatever they guessed at is just, it's not credible," Bush said, and he dismissed the methodology as "pretty well discredited." In DecemberThe UK government, too, rejected the researchers' conclusions. In doing so, it did not mention the advice of the Ministry of Defence's Chief Scientific Adviser, Sir Roy Anderson, who had called the study "robust" and its claimed methods "close to 'best practice' in this area, given the difficulties of data collection and verification in the present circumstances in Iraq", in an internal memo on the day the study was published, dated 13 October 2006.005 ''005'' is a 1981 arcade game by Sega. They advertised it as the first of their RasterScan Convert-a-Game series, designed so that it could be changed into another game in minutes "at a substantial savings". It is one of the first examples of a ...Bush estimated that 30,000 Iraqis had died in the war. Asked at the news conference what he thinks the number is now, Bush said: "I stand by the figure a lot of innocent people have lost their life." At a separate Pentagon briefing, Gen. George Casey, the top U.S. commander in Iraq, said that the figure "seems way, way beyond any number that I have seen. I've not seen a number higher than 50,000. And so I don't give it that much credibility at all."
Criticisms
TheAAPOR investigation of the 2nd ''Lancet'' survey
On 3 February 2009, the Executive Council of theWhen researchers draw important conclusions and make public statements and arguments based on survey research data, then subsequently refuse to answer even basic questions about how their research was conducted, this violates the fundamental standards of science, seriously undermines open public debate on critical issues, and undermines the credibility of all survey and public opinion research. These concerns have been at the foundation of AAPOR's standards and professional code throughout our history, and when these principles have clearly been violated, making the public aware of these violations is in integral part of our mission and values as a professional organization.AAPOR subsequently released a more detailed list of eight specific pieces of information Burnham failed to disclose after repeated requests. These include a copy of the survey questionnaire in all languages into which it was translated, the consent statement, information of sample selection methodology and a summary of the disposition of all sample cases. Neither Dr. Burnham nor the
According to ''New Scientist's'' investigation... Burnham has sent his data and methods to other researchers, who found it sufficient. A spokesman for the Bloomberg School of Public Health at Johns Hopkins, where Burnham works, says the school advised him not to send his data to AAPOR, as the group has no authority to judge the research. The "correct forum", it says, is the scientific literature.According to MacKenzie, "Burnham's complete data, including details of households, is available to bona fide researchers on request." She further noted that the AAPOR's own journal, ''Public Opinion Quarterly'', "published an analysis of Burnham's Iraq survey by David Marker of Westat, a consultancy in Maryland that designs surveys." The
We are aware that, in taking this action, you have subjected yourselves to some criticism. On behalf of the American Statistical Association, we wish to recognize AAPOR for following procedure and acting professionally on such a difficult and divisive matter. In so doing, you eloquently express by your actions the goals stated in your Code.On 1 February 2010, The Bloomberg School and Dr. Burnham were named for the
STONEWALLING/COVERUP" award in iMediaEthics' 2010 Top Ten "Dubious Polling" Awards, based largely on the AAPOR censure. The authors David W. Moore and George F. Bishop, write that Bloomberg and Burnham received the award, "for stonewalling in the face of serious questions about a flawed survey project, which reported more than 600,000 Iraqi deaths from 2003 to 2006," saying, "AAPOR asked for the kind of information that any scientist doing this type of work should release ... The Bloomberg School will not attempt to evaluate what experts believe is almost certainly a faulty methodology, saying the scientific community should make the evaluation. But then the school advises Burnham not to release details about his methods, so the scientific community can't have the information it needs for a definitive assessment. Sounds like a cop-out and a Catch 22, all rolled into one!
Johns Hopkins Investigation of the 2nd ''Lancet'' survey
In February 2009 Johns Hopkins Bloomberg School of Public Health published the results of an internal review of the study. The review found that researchers in the field used data collection forms that were different from those approved in the original protocol. The forms used in the field contained spaces for names of respondents or householders and many such names were collected, in violation of the protocol. The press release said the review did not find evidence that any individual was harmed as a result of these violations, and that no identifiable info was ever out of the possession of the researchers. As a result of their investigation, Hopkins suspended Dr. Burnham's privileges to serve as a principal investigator on projects involving human subjects research. The press release also discussed an examination of all the original data collection forms:An examination was conducted of all the original data collection forms, numbering over 1,800 forms, which included review by a translator. The original forms have the appearance of authenticity in variation of handwriting, language and manner of completion. The information contained on the forms was validated against the two numerical databases used in the study analyses. These numerical databases have been available to outside researchers and provided to them upon request since April 2007. Some minor, ordinary errors in transcription were detected, but they were not of variables that affected the study's primary mortality analysis or causes of death. The review concluded that the data files used in the study accurately reflect the information collected on the original field surveys.
Number of clusters
Steven E. Moore, who conducted survey research in Iraq for theMr. Moore did not question our methodology, but rather the number of clusters we used to develop a representative sample. Our study used 47 randomly selected clusters of 40 households each. In his critique, Mr. Moore did not note that our survey sample included 12,801 people living in 47 clusters, which is the equivalent to a survey of 3,700 randomly selected individuals. As a comparison, a 3,700-person survey is nearly 3 times larger than the average U.S. political survey that reports a margin of error of +/-3%.
Pre-invasion death rate
Fred Kaplan, writing for '' Slate'', has criticised the pre-invasion death rate used in both the 2004 and 2006 Lancet surveys. In an 29 October 2004 article in '' Slate'' he wrote:But there are two problems with this calculation. First, Daponte (who has studied Iraqi population figures for many years) questions the finding that prewar mortality was 5 deaths per 1,000. According to quite comprehensive data collected by the United Nations, Iraq's mortality rate from 1980–85 was 8.1 per 1,000. From 1985–90, the years leading up to the 1991 Gulf War, the rate declined to 6.8 per 1,000. After '91, the numbers are murkier, but clearly they went up. Whatever they were in 2002, they were almost certainly higher than 5 per 1,000.See also a related article about Beth Daponte: In an 20 October 2006 '' Slate'' article Fred Kaplan wrote that the pre-invasion death rate calculated by the 2006 Lancet report authors was also too low. This he said would cause the ''Lancet'' estimate of excess deaths since the invasion to be too high. Fred Kaplan wrote:
Based on the household surveys, the report estimates that, just before the war, Iraq's mortality rate was 5.5 per 1,000. (That is, for every 1,000 people, 5.5 die each year.) The results also show that, in the three and a half years since the war began, this rate has shot up to 13.3 per 1,000. So, the 'excess deaths' amount to 7.8 (13.3 minus 5.5) per 1,000. They extrapolate from this figure to reach their estimate of 655,000 deaths. However, according to data from the United Nations, based on surveys taken at the time, Iraq's preinvasion mortality rate was 10 per 1,000."Number Crunching. Taking another look at the Lancet's Iraq study"In a 20 November 2006 '' Slate'' article, 2 of the ''Lancet'' study authors, Gilbert Burnham and Les Roberts, write:
By Fred Kaplan. October 20, 2006. '' Slate.''
Kaplan claims that the rate was really 10, according to U.N. figures. He wrote, ' Iraq's pre-invasion rate really was 5.5 per 1,000, it was lower than almost every country in the Middle East, and many countries in Europe.' This is just wrong! If Kaplan had checked the U.N. death-rate figures, most Middle Eastern nations really do have lower death rates than most European countries, and in fact have lower death rates than 5.5. Jordan's death rate is 4.2, Iran's 5.3, and Syria's 3.5. The reason for the lower rate is simple: Most Middle Eastern nations have much younger populations compared to most Western nations."Counting Corpses. ''The Lancet'' number crunchers respond to ''Slate''s Fred Kaplan. (And Kaplan replies)"From an 19 October 2006 Washington Post article there is this:
By Gilbert Burnham and Les Roberts. November 20, 2006. '' Slate.''
In a telephone interview, Jon Pedersen, research director for the 2004The above-mentioned U.N. "pre-invasion mortality rate" of 9 deaths/1,000/year is more than either the 2002 or 2003 mortality rates measured by both Lancet studies. Even though the 2004 and 2006 Lancet studies interviewed different sets of households across Iraq, they came up with the same 2002 pre-war mortality rate. From the 2006 ''Lancet'' article: "The striking similarity between the 2004 and 2006 estimates of pre-war mortality diminishes concerns about people's ability to recall deaths accurately over a 4-year period." Here is an excerpt from the supplement to the 2006 ''Lancet'' study:NDP NDP may stand for: Computing * Neighbor Discovery Protocol, an Internet protocol * Nortel Discovery Protocol, a layer two Internet protocol, also called SONMP * Nondeterministic programming, a type of computer language Government * National ...study, said several factors probably account for researchers' different findings. One key issue is how researchers extrapolate from the deaths identified in their field research to a death toll for the whole country. Pedersen noted that the Lancet study is based on a pre-invasion mortality rate of 5.5 deaths per thousand people er year The U.N., he said, used the figure of 9 deaths per thousand. Extrapolating from the lower pre-invasion mortality rate would yield a greater increase in post-invasion deaths, he noted.
For the purpose of analysis, the 40 months of survey data were divided into three equal periods—March 2003 to April 2004; May 2004 to May 2005, and June 2005 to June 2006. Following the invasion the death rate rose each year. * "Pre-invasion: 5.5 deaths/1,000/year * March 2003–April 2004: 7.5 deaths/1,000/year * May 2004–May 2005: 10.9 deaths/1,000/year * June 2005–June 2006: 19.8 deaths/1,000/year * Overall post-invasion: 13.2 deaths/1,000/yearThe difference between the pre-invasion mortality rate and the different mortality rates after the invasion are the excess mortality rates for each period. Table 3 in the ''Lancet'' article lists those rates as 2.6, 5.6, and 14.2. Why the excess mortality rate for June 2005 to June 2006 is listed as 14.2 instead of 14.3 May be due to how rounding was done. The overall excess mortality rate for the whole post-invasion survey period is listed as 7.8 deaths/1000/year in Table 3. The difference between the ''Lancet'' and U.N. pre-invasion mortality rates is 3.5 deaths/1,000/year. The Lancet study used the number of 26,112,353 (from Lancet supplement) as the population of Iraq. 3.5 times 26,112 equals 91,392. So 3.5 deaths/1,000/year means around 91,400 deaths in one year in a population of 26.1 million.
Infant and child death rates
In a 5 March 2007 article in ''40 houses surveyed per day
Madelyn Hicks, a psychiatrist and public health researcher at King's College London in the UK, says she "simply cannot believe" the paper's claim that 40 consecutive houses were surveyed in a single day. "There is simply not enough time in the day," she says, "so I have to conclude that something else is going on for at least some of these interviews." Households may have been "prepared by someone, made ready for rapid reporting," she says, which "raises the issue of bias being introduced." An 24 October 2006 ''Others had suggested that it was impossible for 40 households to be surveyed in one day—but in fact the researchers were split into two teams and conducted 20 household interviews each, he said.An 30 October 2006
In Iraq in 2004, the surveys took about twice as long and it usually took a two-person team about three hours to interview a 30-house cluster. I remember one rural cluster that took about six hours and we got back after dark. Nonetheless, Dr. Hicks' concerns are not valid as many days one team interviewed two clusters in 2004.Lancet author answers your questions"
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Death certificates
Of the 1849 households that completed the survey there were reports of 629 deaths during the study period from 1 January 2002 through June 2006. The ''Lancet'' study claims that, "Survey teams asked for death certificates in 545 (87%) reported deaths and these were present in 501 cases. The pattern of deaths in households without death certificates was no different from those with certificates." So, 92% of those asked for death certificates produced them. In an interview in April 2007 ''Lancet'' study author Les Roberts reported that, "90 percent of the people we interviewed had death certificates. We're quite sure they didn't make these deaths up." TheDeath certificates, which are needed in order to obtain retirement benefits for a person's surviving spouse or children, as well as for inheritance purposes, are issued by the MoH Births/Deaths Administrative Offices which are located in Public Hospitals. Death certificates are usually issued the same day. The following documents are required: :*Medical report; :*Civil ID card of the deceased person; :*Food ration card of the deceased person. :The issuance of death certificates is free.In a 20 November 2006 '' Slate'' article, 2 of the ''Lancet'' study authors, Gilbert Burnham and Les Roberts, write:
In JulyIn October 2006 Middle East Professor006 Alec Trevelyan (006) is a fictional character and the main antagonist in the 1995 James Bond film '' GoldenEye'', the first film to feature actor Pierce Brosnan as Bond. Trevelyan is portrayed by actor Sean Bean. The likeness of Bean as Ale ...for example, the Ministry of Health reported exactly zero violent deaths in Anbar Province, in spite of the contradictory evidence we saw on our televisions. Is that a surveillance network on which our understanding of what is going on in Iraq can depend?
Although there are benefits to registering with the government for a death certificate, there are also disadvantages. Many families who have had someone killed believe that the government or the Americans were involved, and will have wanted to avoid drawing further attention to themselves by filling out state forms and giving their address."655,000 Dead in Iraq since Bush Invasion"In a peer-reviewed paper on the Lancet survey, economist Michael Spagat examined the death certificate data. He noted that the very high reported rate of death certificates by the survey "implies that the official death certificate system has issued, but failed to record the issuance of, about 500,000 death certificates", and notes that the rate of confirmations claimed by the second survey is substantially higher than the rate found in the first survey, despite covering a longer period, and calculates the odds against this to be very high. Spagat further notes several "unlikely patterns in the confirmations of violent deaths through the viewing of death certificates and in the patterns of when death certificates were requested and when they were not requested." His analysis concludes that "there is likely fabrication in the death-certificate data" and that "these data do not give reliable support to he Lancet survey'svery high estimated death rate."
By Middle Eastern ProfessorJuan Cole John Ricardo Irfan "Juan" Cole (born October 23, 1952) is an American academic and commentator on the modern Middle East and South Asia. Dead link; no archive located. He is Richard P. Mitchell Collegiate Professor of History at the University .... October 11, 2006.
Main street bias
The research team of Professors Neil Johnson, Sean Gourley and J.P. Onella of the physics department at Oxford University, Professor Michael Spagat of the economics department of Royal Holloway, University of London, and Professor Gesine Reinert of the statistics department at Oxford University, claimed the methodology of the study was fundamentally flawed by what they term "main street bias". They claimed the sampling methods used "will result in an over-estimation of the death toll in Iraq" because "by sampling only cross streets which are more accessible, you get an over-estimation of deaths.""UK scientists attack Lancet study over death toll"But Prof Burnham said the researchers penetrated much further into residential areas than was clear from the ''Lancet'' paper. The notion 'that we avoided back alleys was totally untrue'. He added that 28% of households were in rural areas—which matches the population spread.An article in ''
Criticism of graph
Figure 4 from the October 2006 ''Lancet'' survey of Iraq War mortality, showing a comparison of 3 mortality estimates. Two letters subsequently published in the Lancet journal challenged this graph. The purpose of the graph in the ''Lancet'' article is in "monitoring trends over time," which show increased deaths from 3 mortality different mortality estimates. Results from other studies track results from the Lancet surveys. The graph states, "the similar patterns of mortality over time documented in our survey and by other sources corroborate our findings about the trends in mortality over time." The graph shows that the IBC and DoD data document the rise in cumulative deaths over time (plotted along the "Deaths" axis on the left). Rates for the Lancet are plotted independently using the "Deaths per 1,000 per year" axis on the right. A letter by Debarati Guha-Sapir, Olivier Degomme and Jon Pedersen argues: "Burnham and colleagues' figure 4, in which cumulated Iraq Body Count deaths parallel their study's mortality rates, is misleading. Rates cannot be compared with numbers, much less with cumulative numbers." A second letter by Josh Dougherty argues that the DoD figure is misrepresented: "Burnham and colleagues' assertion that the DoD 'estimated the civilian casualty rate at 117 deaths per day' is mistaken, as is their figure 4, which repeats this error in graphic form. These data refer to Iraqi civilians and security-force personnel, not just to civilians, and to casualties (ie, deaths or injuries), not just deaths." The ''Lancet'' authors replied, "Josh Dougherty and Debarati Guha-Sapir and colleagues all point out that figure 4 of our report mixes rates and counts, creating a confusing image. We find this criticism valid and accept this as an error on our part. Moreover, Dougherty rightly points out that the data in the US Department of Defense source were casualties, not deaths alone... We wanted to show that the three sources all similarly pointed to an escalating conflict."More responses to criticisms
In a ''"Over the last 25 years, this sort of methodology has been used more and more often, especially by relief agencies in times of emergency," said Dr. David Rush, a professor and epidemiologist at Tufts University in Boston.Sir
The US Congress should agree: in June this yearBurnham is one of the authors of both of the ''Lancet'' studies. 19 October 2006 ''Washington Post'' article"Is Iraq's Civilian Death Toll 'Horrible' – Or Worse?"006 Alec Trevelyan (006) is a fictional character and the main antagonist in the 1995 James Bond film '' GoldenEye'', the first film to feature actor Pierce Brosnan as Bond. Trevelyan is portrayed by actor Sean Bean. The likeness of Bean as Ale ...they unanimously passed a bill outlining financial and political measures to promote relief, security and democracy in the Democratic Republic of Congo. The bill was based in part on the veracity of a survey conducted by the Burnet Institute (Melbourne) and the International Rescue Committee (New York) that found 3.9 million Congolese had perished because of the conflict. This survey used the same methodology as Burnham and his associates. It also passed the scrutiny of a UK parliamentary delegation and the European Union.
A review of a variety of mortality estimates for Iraq was made by a group of scientists and published in 2008 in ''Conflict and Health'', a peer-reviewed journal; their conclusion is that the Lancet "studies provided the most rigorous methodology as their primary outcome was mortality.
UNDP ILCS study compared to ''Lancet'' studies
UNDP ILCS stands for the 2004 United Nations Development Programme Iraq Living Conditions Survey"Iraq Living Conditions Survey 2004"Working for the U.N. Development ProgramIn an 30 October 2006NDP NDP may stand for: Computing * Neighbor Discovery Protocol, an Internet protocol * Nortel Discovery Protocol, a layer two Internet protocol, also called SONMP * Nondeterministic programming, a type of computer language Government * National ...the highly regarded Norwegian researcher Jon Pederson led a survey that recorded between 18,000 and 29,000 violent deaths during the first year of occupation. The survey was not focused on deaths, but asked about them over the course of lengthy interviews that focused on access to services. While this was more than twice the rate recorded by IBC raq Body Count projectat the time, Pederson expressed concern for the completeness and quality of the data in a newspaper interview last year. The surveys reported in ''The Lancet'' were focused solely on recording deaths and count about two and a half times as many excess deaths from all causes over the same period.
This UNDP survey covered about 13 months after the invasion. Our first survey recorded almost twice as many violent deaths from the 13th to the 18th months after the invasion as it did during the first 12. The second survey found an excess rate of 2.6/1000/year over the same period corresponding to approximately 70,000 deaths by April 2004. Thus, the rates of violent death recorded in the two survey groups are not so divergent.The ILCS asked about deaths during the course of a lengthy interview on the household's living conditions. In the 3 main ILCS documents (in pdf form) all the war-related deaths info is in 6 paragraphs on page 54 of the analytical report. It states:
The ILCS data has been derived from a question posed to households concerning missing and dead persons during the two years prior to the survey. Although the date was not asked for, it is reasonable to suppose that the vast majority of deaths due to warfare occurred after the beginning of 2003.
Iraq Body Count project compared to ''Lancet'' studies
Besides the comparisons made in various publications, and in previous sections here, there are also more comparisons and criticisms of both studies in the relevant sections of the above-linked articles. In particular see the "Undercounting" section atORB survey compared with ''Lancet'' studies
On 14 September 2007, ORB (Opinion Research Business), an independent UK based polling agency, published an estimate of the total casualties of the Iraq war. The figure suggested by ORB, which was based on survey responses from 1,499 adults, stands at 1,220,580 deaths, with a margin of error of 2.5%. This estimate, although conducted independently, and using a different polling methodology, is consistent with the Lancet findings if accounting for the additional 14 months covered by the ORB poll."UK Poll Consistent with 1 Million Extrapolation of ''Lancet'' Death Toll"Iraq Family Health Survey compared with ''Lancet'' studies
The "Iraq Family Health Survey" published in the ''See also
* Casualties of the Iraq War. An overview of many casualty estimates. *