Table 2. Epoch distribution.

	No	Gender	Epoch count
COPD	1	F	14,323
	2	F	22,213
	3	M	2,248
	4	M	16,228
	5	M	13,978
	6	M	15,673
	7	M	14,428
	8	M	13,093
	Total		112,184
Healthy	9	M	17,263
	10	M	19,393
	11	M	15,463
	12	M	15,463
	13	M	15,463
	14	M	14,773
	Total		97,818