Low weight gain in infancy and suicide in adult life

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Abstract
As previously described, all births in Hertfordshire from 1911 onwards were notified by the attending midwife.3 Health visitors saw the babies periodically throughout infancy, recorded the method of feeding, and wrote general comments on the baby's development and well being. At 1 year the babies were weighed. We traced 10141 (79%) of the boys born during 1911-30 and 5585 (60%) of the girls born during 1923-30. The average birthweight and weight at 1 year of those who were traced were the same as those of the babies who were not traced. We compared the numbers of deaths from suicide at ages 20-74 (International Classification of Diseases (9th revision) codes E950-959) during 1951-93 with the national rates for men and women of a corresponding age and year of birth. Death rates were expressed as standardised mortality ratios with the national average as 100. Tests for trend were based on the corresponding log-linear model, and for differences between means we used a two sample t test.

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