Lancet surveys of Iraq War casualties

The Lancet, one of the oldest scientific medical journals in the world, published two peer-reviewed studies on the effect of the 2003 invasion of Iraq and subsequent occupation on the Iraqi mortality rate. The first was published in 2004; the second (by many of the same authors) in 2006. The studies estimate the number of excess deaths caused by the occupation, both direct (combatants plus non-combatants) and indirect (due to increased lawlessness, degraded infrastructure, poor healthcare, etc.).

The first survey published on 29 October 2004, estimated 98,000 excess Iraqi deaths (with a range of 8,000 to 194,000, using a 95% confidence interval (CI)) from the 2003 invasion and subsequent occupation of Iraq to that time, or about 50% higher than the death rate prior to the invasion. The authors described this as a conservative estimate, because it excluded the extreme statistical outlier data from Fallujah. If the Fallujah cluster were included, the mortality estimate would increase to 150% over pre-invasion rates (95% CI: 1.6 to 4.2).

The second survey published on 11 October 2006, estimated 654,965 excess deaths related to the war, or 2.5% of the population, through the end of June 2006. The new study applied similar methods and involved surveys between May 20 and July 10, 2006. More households were surveyed, allowing for a 95% confidence interval of 392,979 to 942,636 excess Iraqi deaths. 601,027 deaths (range of 426,369 to 793,663 using a 95% confidence interval) were due to violence. 31% (186,318) of those were attributed to the US-led Coalition, 24% (144,246) to others, and 46% (276,472) unknown. The causes of violent deaths were gunshot (56% or 336,575), car bomb (13% or 78,133), other explosion/ordnance (14%), air strike (13% or 78,133), accident (2% or 12,020), and unknown (2%).

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