The mummy's curse is assumed to be a physical rather than a metaphysical entity and therefore only those people physically present at the breach of sacred seals in a previously undisturbed area of the pharaoh's tomb were deemed at risk. It is also assumed that exposure is finite so only those who visit and enter the same day were said to be exposed. The tomb of Tutankhamen had been raided in ancient times, possibly on more than one occasion (fig ). Therefore the opening of the first door, clearing of the passageway, the opening of the second and fourth door, and the clearing of the antechamber and annexe were not thought to put individuals at risk.
I defined exposure to the curse as those Western individuals recorded in the writings of Howard Carter as present at the breaking of the seals and the opening of the third door on 17 February 1923, the opening of the sarcophagus on 3 February 1926, the opening of the coffins on 10 October 1926, and the examination of the mummy on 11 November 1926.
1,3,4 Thus people could have had from one to four exposures to the curse.
For unexposed individuals I used Westerners recorded in Carter's writings as being in Egypt at the time but not recorded by him to have been present at the site at the aforementioned times. I included only Western individuals in the analysis as documentation of this group was more likely to be complete and the life expectancy of Egyptians would be expected to differ from that of Westerners.
Dates of birth and death were identified by biographical texts, newspaper obituaries (the
Times,
New York Times,
Le Monde) and a Google web based search.
5–16 I searched with the keywords archaeology, Egyptology, personal name, Egypt, Tutankhamun, and Tutankhamen. For non-archaeologists I searched genealogy, royal, military, and other occupational websites. When I could not establish precise dates, individuals were assumed to have been born or died on June 30 of the year recorded.
Women were mostly ignored in the biographical texts of the time. Therefore it was often possible to identify a date of marriage only through a husband's entry. In such circumstances I assumed a woman to have been born at least 16 years (the legal age for marriage) before this date.
Data were analysed with SPSS for Windows (version 11.0.0). I divided records into those who survived less than or greater than 10 years. I chose the cut off of 10 years because if there was an effect of exposure this would probably occur in the first 10 years. Comparisons were then made by age, sex, and exposure. Survival was analysed by any or no exposure and by number of exposures by logistic regression.