Figure 6
From: Passive longitudinal weight and cardiopulmonary monitoring in the home bed
Adherence-independent longitudinal ballistocardiographic monitoring using BedScales. (a) BCG signals (black) from each of the 4 legs during an overnight recording, smoothed for display (light gray is the overnight weight signal). (b) Single-peak BCG (pink), BCG (purple) showing the labeled waveform (smoothed for display), and simultaneously recorded ECG signal (black). (c) Comparison of longitudinal BCG signals from the 4 individual scales (blue, orange, green, red), the single-peak BCG (pink), and the ECG (black). (d) Comparison of heart rates derived from BedScales (pink) and ECG (black) across one night (~ 900 epochs). (e) Histogram of heart rate differences derived from BedScales and from ECG across 8 sleep study patients (5219 epochs, mean error −0.94 bpm, standard deviation 2.14 bpm). X axis limits set at ± 1% quantile of error. (f) Bland–Altman plot comparing BedScales and ECG derived heart rates. Y axis limits set at ± 1% quantile of error.
