Fig. 2From: Is sleep apnea underdiagnosed in adult patients with osteogenesis imperfecta? –a single-center cross-sectional studyMean transcutaneous CO2 (TcCO2) values in patients with Osteogenesis imperfecta during the in-laboratory polysomnography study. TcCO2 was recorded on 23 patients during wake-state, N3 sleep-stage, and REM sleep-stage. There was no significant increase in the TcCO2 values during sleep compared to wakefulness (p > 0.05)Back to article page