![](https://www.itamar-medical.com/wp-content/uploads/2019/05/true-sleep-image.png)
- WatchPAT calculates AHI and RDI using the patient’s True Sleep Time rather than the recorded time used in most commercially available HSAT’s
- True Sleep Time reduces the risk of misdiagnosis and misclassification that has been reported up to 20% with using total recording time3