Table 2. Degeneration grade according to Pfirrmann scale, sex, and disc level of the cervical intervertebral discs of healthy young adults analyzed in study.

Degeneration	Sex		Disc Levels
Grade	Male	Female	C2-3	C3-4	C4-5	C5-6	C6-7	Total
I	42	37	15	15	15	13	21	79
II	75	70	33	31	30	23	28	145
III	51	72	22	24	25	32	20	123
IV	2	1	0	0	0	2	1	3
Total	170	180	70	70	70	70	70	350