Obstructive sleep apnea (OSA) may signifi¬cantly affect erectile function, After screening for age and co-morbidities (includ¬ing diabetes, smoking history and body mass index – all risk factors of erectile dysfunction, or ED), researchers found that patients with ED were twice more likely to have OSA than their counterparts without OSA. The likeli¬hood of having OSA increased as the severity of erectile dysfunction increased, suggesting that men with this condition should also be screened for OSA.