Fig. 3: IBI and HR correlation analysis and the relationship of agreement between IH and Lead-II ECG. | npj Digital Medicine

Fig. 3: IBI and HR correlation analysis and the relationship of agreement between IH and Lead-II ECG.

From: In-ear infrasonic hemodynography with a digital health device for cardiovascular monitoring using the human audiome

Fig. 3

Correlation between a IBI and b HR, quantified by the Pearson correlation coefficient, r, and (c, d) the relationship of the agreement for simultaneous IH and ECG measurements. Separate markers correspond to three different breathing and environmental conditions, with subjects: (red triangle) breathing normally,(green circle) breathing normally while listening to music, and (blue star) performing resonant breathing. The identity line (IH IBI = ECG IBI) in top plots is drawn to guide the eye. The horizontal lines in bottom plots depict the mean value of the difference and the 95% confidence interval region: d and d ± 1.96σ, respectively.

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