Table 2. Summary of extracted study parameters.

Publication (year)	Device (size)	Wrist band	Ground truth	Number of patients & condition	Age (range) [years]	SpO2 according to ground truth (range) [%]	Pearson correlation coefficient	Race	Data availability	Conflict of interest	Funding
Rafl et al. (2022) [17]	Series 6 (not mentioned)	Not mentioned	Masimo Radical-7 pulse oximeter	24 healthy adults in hypoxic conditions	Mean: 24 (20 - 28)	Not mentioned	Not mentioned	Caucasian	Upon request from the corresponding author	None	Czech Technical University
Pätz et al. (2022) [14]	Series 6 (44 mm)	adjustable elastic wristband made of rubber	GE Healthcare Carescape Dinamap V100 pulse oximeter	508 patients (238 adults, 270 children) with congenital heart disease	Adults median: 32 (18 - 76); Children median: 10 (0.1 - 17)	Adults median: 97 (78 - 100); Children median: 97 (73 - 100)	0.813	Not mentioned	Not mentioned	None	Not mentioned
Littell et al. (2022) [16]	Series 6 (not mentioned)	Not mentioned	Coviden Nellcor Portable SpO2 Patient Monitoring System	84 patients <23 years with weight >3 kg with an ECG ordered as part of their medical care	Mean: 7.2 (0.1 - 18)	Median: 98 (78 - 100)	0.76	Not mentioned	Uploaded to public repository	None	None
Spaccarotella, Polimeni et al. (2022) [2]	Series 6 (not mentioned)	Not mentioned	Nellcor Portable SpO2 Patient Monitoring System, PM10N	257 adult patients (141 with cardiovascular disease, 60 with lung disease, 56 healthy controls)	Mean: 64.0 (not mentioned)	Not mentioned	0.89	White	Upon request from the corresponding author	None	None
Pipek et al. (2021) [15]	Series 6 (44 mm)	small/medium and large	Mobil POD-2 Finger Oximeter, Multilaser OX-06 Oximeter	100 adult patients (23 with COPD, 61 with interstitial lung disease, 16 healthy controls)	Mean: 59.6 (not mentioned)	Mean: 94.4% (not mentioned)	0.81	Assessed with Fitzpatrick skin type, but no information on distribution	Not mentioned	None	Not mentioned