[Retracted] Development of an IoT-Based Sleep Apnea Monitoring System for Healthcare Applications

Table 6

Comparison table with previous studies.

Reference	Main parameters	Result (final or mean)
In the paper [25]	Oxygen saturation (SpO2)	() %; The oxygen saturation for sleep apnea patients is in this range
In the paper [6]	Heart rate	() bpm; The study detected sleep apnea in this range of heart rate.
In the paper [26]	Polysomonography	91.8% to 96.5% accuracy on adaptive apnea index
In the paper [27]	Snoring sound intensity	45 dB to 58 dB and mean value is approximately 52 dB
In the paper [11]	3D camera	A novel approach has been proposed to measure respiratory movement using a 3D camera to detect apnea.
Our system	SpO2, heart rate, ECG, skin response, snoring sound intensity	SpO2: 94.55 to 97.81; BPM: 74.47 to 91.39; GSR: 128.95 to 275.45; Sound: 35 dB to 60 dB; ECG: generalized