Tight underpants and trousers and risk of dyspermia


Istituto di Ricerche Farmacologiche ‘Mario Negri’, via Eritrea, 62–20157 Milano, Italy.


The association between the wearing of tight underpants and trousers and risk of dyspermia has been analysed using data from a case–control study. Cases included infertile men with a diagnosis of unexplained dyspermia. Normospermic men of infertile couples were eligible as controls. In comparison with men usually wearing loose underpants, the odds ratio (OR) of dyspermia was 1.9 (95% confidence interval, CI, 0.9–4.1) in those wearing tight underwear. Likewise, the OR of dyspermia was 1.6 (95% CI 0.9–3.0) in men reporting usually wearing tight trousers (including jeans), in comparison with those wearing loose trousers.