Effect of Skin Pigmentation and Finger Choice on Accuracy of Oxygen Saturation Measurement in an IoT-Based Pulse Oximeter

Shyqyri Haxha; Chike Nwibor; Mian Ali; Mohamed Sakel; Karen Saunders; Vladimir Dyo; Shakira Nabakooza

doi:10.3390/s24113301

Table 3

The Ailie PO’s multiple finger comparison measurements with SpO₂ mean and SD, using repeated two-way ANOVA test and post hoc test (Bonferroni-corrected at alpha p = 0.01).

Finger	SpO₂ (Mean ± 1.96 × SD)	R1	R2	R3	R4	R5	L1	L2	L3	L4
R1	97.95 ± 0.94	-
R2	97.90 ± 0.64	NS	-
R3	98.05 ± 0.69	NS	NS	-
R4	97.80 ± 1.15	NS	NS	NS	-
R5	98.10 ± 0.64	NS	NS	NS	NS	-
L1	97.40 ± 1.90	NS	NS	NS	NS	NS	-
L2	97.60 ± 1.10	NS	NS	NS	NS	NS	NS	-
L3	97.75 ± 1.25	NS	NS	NS	NS	NS	NS	NS	-
L4	98.10 ± 0.45	NS	NS	NS	NS	NS	NS	NS	NS	-
L5	97.70 ± 0.66	NS	NS	NS	NS	NS	NS	NS	NS	NS