Table 3.

Number of extracted heartbeats from the nighttime ECG recordings for each eligible participant enrolled in the study and their distribution in training and testing datasets.

Subject ID	Number of heartbeats				Number of recording nights (nights with low glucose events)
	Training		Testing		Training	Testing
	Normal	Low	Normal	Low
1	37042	38798	35991	22216	3 (3)	3 (3)
2	51026	18266	68941	6321	4 (3)	4 (3)
3	92261	21844	69533	5053	6 (2)	4 (1)
4	28342	34491	46345	13544	4 (3)	4 (2)
Average	52168	28350	55203	11784	4.3 (2.8)	3.8 (2.3)