Table 4.

Demographic data in the primary survey

	Patients with cervical myelopathy			Healthy volunteers
	Male	Female	Total	Male	Female	Total
n	164	86	250	96	120	216
Age (years)
202–29		1	1	15	33	48
30–39	7	2	9	18	22	40
40–49	20	9	29	20	16	36
50–59	40	18	58	15	21	36
60–69	55	20	75	12	15	27
70–79	32	27	59	12	12	24
80–89	9	9	18	4	1	5
90 or more	1		1
Disorders of the cervical spine
Disc herniation			33
Spondylosis			146
Ossification of the posterior longitudinal ligament			59
Calcification of the ligament fiavum			2
Spinal cord tumor			7
Combined			3
Other orthopedic disorders Yes
Yes			17			3
No			233			213