Bruyneel M, et al. – In this study, researchers assessed the prevalence of known and newly diagnosed overt and subclinical hypothyroidism (SCH) among patients with obstructive sleep apnea (OSA). Participants included 280 consecutive patients (70% male) with moderate or severe OSA who were referred for CPAP therapy. The investigators determined thyroid-stimulating hormone and free T4 levels in participants by obtaining a fasting blood sample. Participants had mean ± SD body mass index and apnea–hypopnea index of 33 ± 7 kg/m² and 49 ± 25, respectively. According to findings, a thyroid problem was detected in 16% of patients, and 8% of these were newly diagnosed with SCH in this patient population of moderate or severe OSA.