The study surveyed 9,345 households across Iraq and estimated 151,000 deaths due to violence (95% uncertainty range, 104,000 to 223,000) from March 2003 through June 2006.Employees of the Iraqi Health Ministry carried out the survey.The study also estimated that 35% of violent deaths were attributed to the Coalition, and 32% to militias.Cardiovascular conditions accounted for about half (47%) of nonviolent deaths, chronic illnesses 11%, infant or childhood deaths other than injuries 12.4%, non-war injuries 11%, and cancer 8%.by the Project on Defense Alternatives at Commonwealth Institute in Cambridge, Massachusetts, stated that for March 19, 2003, to April 30, 2003, "Based on the analysis that follows we estimate that the 2003 Iraq war produced between 7,600 and 10,800 Iraqi combatant fatalities." The study also stated: "Our analysis of the evidence leads to the conclusion that between 10,800 and 15,100 Iraqis were killed in the war.Of these, between 3,200 and 4,300 were noncombatants – that is: civilians who did not take up arms." The study explained that to arrive at these numbers, they had adjusted the underlying incident reports from the field by reducing each count by anywhere from 20% to 60%, based on their own reliability assessments, in order to "control for casualty inflation – a prevalent form of bias." The study author Carl Conetta reported: "All told, more than 40,000 Iraqis were killed or injured," The Iraq Body Count project (IBC) documented a higher number of civilian deaths up to the end of the major combat phase (May 1, 2003). There were 17,338 civilian injuries inflicted up to May 1, 2003.
The causes of violent deaths were gunshot (56%), car bomb (13%), other explosion/ordnance (14%), airstrike (13%), accident (2%), unknown (2%).ORB reported that "48% died from a gunshot wound, 20% from the impact of a car bomb, 9% from aerial bombardment, 6% as a result of an accident and 6% from another blast/ordnance." The Lancet study's figure of 654,965 excess deaths through the end of June 2006 is based on household survey data.The estimate is for all excess violent and nonviolent deaths.The data was in the form of a list of yearly totals for death certificates issued for violent deaths by hospitals and morgues.The official who provided the data told the Associated Press said the ministry does not have figures for the first two years of the war, and estimated the actual number of deaths at 10 to 20 percent higher because of thousands who are still missing and civilians who were buried in the chaos of war without official records.Official estimates of Iraq War casualties range from 110,000 to 460,000.