Table 5.

Sleep angle and stand angle characterization from the automatic smartphone corrected position. The reference angles are 90° for supine, ±180° for right, 0° for left and −90° for prone.

	Automatic Smartphone Accelerometry Classified by the Discretized Positions
	Right	Supine	Left	Prone	Stand
Angle: Mean	143.9	90.6	27.0	−71.7	166.9
Angle: Standard deviation	14.0	8.7	21.2	26.6	12.1
% Angles: Reference angle ± 5° window	0.7	52.6	3.6	0	9.7
% Angles: Reference angle ± 10° window	5.9	80.2	7.0	0	24.8
% Angles: Reference angle ± 15° window	10.9	90.8	15.8	0	31.3
% Angles: Reference angle ± 20° window	17.4	95.9	27.1	0	76.8
% Angles: Reference angle ± 25° window	27.9	97.8	35.4	2.6	94.4