The paper is a sequel to an earlier paper by Clarke published in T.F.A. vol. 27, p. 20 and it brings up to date the results of an investigation into the mortality experienced by various classes of impaired lives.

For each impairment considered, percentages of actual to expected deaths are shown, the expected deaths being calculated from mortality rates applicable to a corresponding group of standard lives.

In a separate section of the paper, the deaths are analysed by cause with a view to establishing what causes of death are responsible for the extra mortality arising among lives suffering from specific impairments.