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Published online by Cambridge University Press: 18 August 2016
In 1947 the company with which the author is associated decided to institute an enquiry into the mortality of impaired lives. From the first the venture was both medical and actuarial, and a leading part in the planning of the investigation was undertaken by the company's Principal Medical Officer, T. W. Preston, M.D., who devised an impairment coding scheme and has since continued to supervise the coding of policies qualifying for inclusion in the data. While the present paper describes methods used in the statistical analysis of the results, the author wishes to place on record the major role played by Dr Preston in the carrying out of the investigation. The work has, in fact, involved the combination of medical and actuarial skills, and without the participation of the medical profession no actuarial investigation into the mortality of impaired lives would be practicable.
page 215 note * Deaths at age 70 and above to be disregarded.
page 216 note * Codes 220 and 221 were discarded at an early stage of the investigation.
page 219 note * For example, thoracoplasty, phrenicotomy, etc.
page 232 note * Morrison, G. L. and Morris, J. N., Lancet, 1959, ii, p. 864, and 1960, ii, p. 829.Google Scholar
page 232 note † Master, A. M., Garfield, C. J. and Walters, M. B., Normal blood pressure and hypertension (London: Henry Kimpton, 1952).Google Scholar
