An outcome measure of functionality in patients with lumber spinal stenosis: a validation study of the Iranian version of Neurogenic Claudication Outcome Score (NCOS)

Table 1 The characteristics of the study sample (n =84)

Age groups (Year)		No.	%
	30-54	23	27
	55-64	24	29
	≥65	37	44
	Mean (SD)	61 (11)
	Range	30-84
Gender
	Male	25	30
	Female	59	70
Educational status
	Illiterate	20	24
	Primary	44	52
	Secondary	12	15
	College/university	8	9
Marital status
	Single	7	8
	Married	66	79
	Divorced/widowed	11	13
Morphology of the Dural Sac on MRI*
	C	56	67
	D	28	33
NCOS score**
Preoperative
	Mean (SD)	26.9 (12.7)
	Range (SD)	0-61
Postoperative
	Mean (SD)	69.7 (16.8)
	Range	31-100
ODI***
Preoperative
	Mean (SD)	32.4 (12.1)
	Range	21-50
Postoperative
	Mean (SD)	14.9 (11.2)
	Range	0-26

* D: Extreme and C: Severity of lumbar spinal stenosis based on the morphology of the dural sac as observed on T2 axial MRI. There were no less severe groups in the study.
**. Higher scores on the NCOS indicate better conditions.
*** Higher scores on the ODI indicate worst conditions.

ISSN: 1471-2377