Compulsory military service as a measure of later physical and cognitive performance in male survivors of childhood cancer

Abstract

Background: Compromised physical fitness and cognitive difficulties have been reported as late effects of cancer treatment during childhood. To assess this issue, the military rankings of cancer survivors in medical checkups at call-up, and conscripts’ physical and cognitive performance during the first weeks of compulsory military education were compared to those of matched population controls without a history of cancer. Material and methods: A total of 1680 male patients born between 1960 and 1992 with a malignancy diagnosed before the age of 16 who were alive at the call-up age (18 years) were identified using the Finnish Cancer Registry, and five age, sex and place of residence matched controls for each patient using the Population Register Centre. Data on military service were gathered from Finnish Defense Forces. A conditional logistic regression analysis, the GEE-method with the cumulative logit link function, the chi-square test, the chi-square test for trend and a one-way analysis of variance were used in different analyses. Results: Cancer survivors were exempted from military service more often than the controls (p