Table 4.

Comparison of demographic data and clinical outcomes between patients with C5-7 and C8 radiculopathies.

	C5-7 radiculopathy (mean [SD])	C8 radiculopathy (mean [SD])	p-value
N	329	30
Age (years)	54.2 [10.8]	59.8 [10.2]	0.006
Sex (male, %)	77.5	73.3	0.650
BMI (kg/m2)	23.8 [3.4]	23.9 [3.5]	0.892
ASA grade (grade 1:2:3:4)	37:59:4:0	80:20:0:0	< 0.001
Diabetes mellitus (%)	9.7	10.0	1.000
Surgical procedure (PD:ADF:PDF, %)	72:26:2	87:10:3	0.078
Etiology (disc hernia, %)	33.4	13.3	0.024
NDI scores
Preoperative	17.3 [8.1]	15.5 [8.2]	0.242
Postoperative	8.0 [7.7]	10.0 [7.7]	0.180
Improvement rate at the individual level (%)	50.7 [47.3]	32.5 [41.1]	0.043
NRS neck pain
Preoperative	4.5 [2.9]	3.0 [3.3]	0.006
Postoperative	1.9 [2.4]	1.7 [2.3]	0.695
Changes	2.6 [3.0]	1.3 [2.6]	0.015
NRS upper back pain
Preoperative	3.3 [3.3]	3.9 [3.4]	0.346
Postoperative	1.3 [2.1]	1.6 [2.3]	0.420
Changes	2.1 [3.3]	2.3 [4.4]	0.669
NRS arm pain
Preoperative	5.5 [3.1]	4.9 [2.9]	0.281
Postoperative	2.0 [2.5]	2.8 [3.0]	0.071
Changes	3.5 [3.6]	2.0 [3.4]	0.030
NRS neck numbness
Preoperative	1.6 [2.7]	1.0 [1.9]	0.253
Postoperative	0.7 [1.9]	1.0 [2.1]	0.460
Changes	0.9 [2.4]	0.5 [1.9]	0.432
NRS upper back numbness
Preoperative	1.3 [2.5]	0.9 [1.7]	0.324
Postoperative	0.5 [1.3]	0.4 [0.8]	0.654
Changes	0.9 [2.4]	0.5 [1.9]	0.432
NRS arm numbness
Preoperative	5.7 [2.9]	5.4 [3.0]	0.612
Postoperative	2.2 [2.7]	3.1 [2.8]	0.082
Changes	3.5 [3.4]	2.3 [3.4]	0.066

ASA: American Society of Anesthesiologists; ADF: anterior decompression and fusion; BMI: body mass index; NDI: neck disability index; NRS: numerical rating scale; PD: posterior decompression; PDF: posterior decompression and fusion; SD: standard deviation.

Bold values indicate p < 0.05.