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Trends in the proportion of children in the Northeast United States whose mothers underwent abdominal x-ray examinations during pregnancy by year of birth (1947–60) and corresponding rate of childhood cancer in birth cohorts
| Year of birth | Total Number of Children | % X-rayed | Leukemia Rate/10,000 | Solid Cancers Rate/10,000 |
|---|---|---|---|---|
| 1947–1950 | 3,752 | 9.9 | 5.2 | 3.8 |
| 1951–1954 | 4,175 | 10.5 | 4.5 | 4.2 |
| 1955–1957 | 3,129 | 9.8 | 3.7 | 3.2 |
| 1958–1960 | 3,220 | 7.1 | 3.1 | 2.7 |
Source: Monson and MacMahon 1984 [62]
