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. 2019 Jul 23;9:10666. doi: 10.1038/s41598-019-46936-9

Table 5.

Correlation between reference blood pressure (BP) versus BP calibrated from scale pulse transit time (PTT), wrist PTT, and pulse arrival time (PAT) (mean +/− SE). DP: diastolic BP. SP: systolic BP. ǂp < 0.025 with respect to PAT (paired t-test).

DP SP
Green PPG IR PPG Green PPG IR PPG
Scale PTT PTTS1 0.70 +/− 0.04 0.60 +/− 0.04 0.67 +/− 0.04 0.55 +/− 0.07
PTTS2 0.73 +/− 0.03 0.59 +/− 0.05 0.67 +/− 0.04 0.54 +/− 0.07
Wrist PTT PTTW1 0.75 +/− 0.03 0.61 +/− 0.07ǂ 0.76 +/− 0.03 0.61 +/− 0.08
PTTW2 0.79 +/− 0.03ǂ 0.65 +/− 0.07ǂ 0.81 +/− 0.02ǂ 0.65 +/− 0.08
PAT 0.69 +/− 0.04 0.42 +/− 0.09 0.72 +/− 0.04 0.50 +/− 0.10