Table 1.

Study protocol for patients included in the validation set.

Subject preparation

At least 5 min relaxed in an isolated and quiet room at a comfortable temperature Back, elbow and forearm supported, legs uncrossed, and feet flat on the floor, empty bladder Appropriate cuff size and smartphone at the level of the left ventricle of the heart

Lateral difference determination (LD)

3 reference measurements on right arm 3 reference measurements on left arm

Simultaneous OptiBP and Reference BP recordings

Measurements #0 (for screening and calibration, OptiBP on right arm for even-numbered subject and left for uneven) Reference measurement (R0) and OptiBP measurement (T0) Wait at least 60 s

Measurement #1 Reference measurement (R1) and OptiBP measurement (T1) Wait at least 60 s

Measurement #2 Reference measurement (R2) and OptiBP measurement (T2) Wait at least 60 s

Measurement #3 Reference measurement (R3) and OptiBP measurement (T3) Wait at least 60 s and interchange arm sides

Measurement #4 (for calibration) Reference measurement (R4) and OptiBP measurement (T4) Wait at least 60 s

Measurement #5 Reference measurement (R5) and OptiBP measurement (T5) Wait at least 60 s

Measurement #6 Reference measurement (R6) and OptiBP measurement (T6) Wait at least 60 s

Extra measurement #7 Reference measurement (R7) and OptiBP measurement (T7) Wait at least 60 s

Extra measurement #8 Reference measurement (R8) and OptiBP measurement (T8)

R reference measurement, T tested device measurement (OptiBP).