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. 2010 Mar 21;10:10. doi: 10.1186/1471-2482-10-10

Table 3.

Univariate and multivariate Cox regression model of potential predictors of outcome.

Delta radicular pain Delta neck pain Delta headache
Univariate Multivariate Univariate Multivariate Univariate Multivariate
Sex 0.25
[-0.56, 1.05]
0.031
[-0.73, 0.79]
0.40
[-0.41,1.22]
0.18
[-0.49, 0.85]
0.34
[-0.34, 1.01]
0.15
[-0.45,0.74]
Age -0.035
[-0.08, 0.01]
0
.
0.0095
[-0.03, 0.05]
0
.
-0.000059
[-0.04, 0.04]
0
.
Type of fusion 0.0077
[-0.87, 0.88]
0.21
[-0.61, 1.04]
0.096
[-0.78, 0.98]
-0.069
[-0.79, 0.66]
-0.21
[-0.94, 0.52]
-0.040
[-0.69, 0.61]
No of levels 0.40
[-0.38, 1.19]
0.35
[-0.49, 1.18]
0.23
[-0.56, 1.02]
0.14
[-0.60, 0.87]
0.32
[-0.34, 0.98]
0.37
[-0.28, 1.03]
Level 0.088
[-0.46, 0.64]
0.055
[-0.53, 0.64]
0.35
[-0.20, 0.91]
0.068
[-0.45, 0.58]
0.019
[-0.44, 0.48]
-0.18
[-0.64, 0.28]
Previous symptom duration -0.0019
[-0.01, 0.01]
-0.0016
[-0.01, 0.01]
0.0028
[-0.00, 0.01]
-0.00088
[-0.01, 0.01]
0.0018
[-0.00, 0.01]
-0.0014
[-0.01, 0.00]
Previous neck surgery -0.62
[-2.59, 1.36]
-0.50
[-2.37, 1.36]
-1.75
[-3.73, 0.23]
-1.82*
[-3.45, -0.18]
-1.31
[-3.03, 0.41]
-1.02
[-2.54, 0.51]
Previous neck trauma 0.24
[-1.17, 1.64]
-0.098
[-1.42, 1.23]
-0.58
[-1.99, 0.83]
-0.37
[-1.53, 0.79]
0.011
[-1.16, 1.18]
-0.53
[-1.56,0.51]
Preop radicular pain 0.60***
[0.44, 0.76]
0.63***
[0.45, 0.81]
0.31***
[0.13, 0.48]
-0.030
[-0.19, 0.13]
0.065
[-0.08, 0.21]
-0.021
[-0.16, 0.12]
Preop neck pain 0.14
[-0.00, 0.28]
-0.075
[-0.23, 0.08]
0.66***
[0.54, 0.78]
0.75***
[0.62, 0.89]
0.16**
[0.04, 0.28]
-0.035
[-0.16, 0.09]
Preop headache 0.078
[-0.07,0.22]
0.041
[-0.11, 0.19]
0.087
[-0.06, 0.23]
-0.22**
[-0.35, -0.09]
0.52***
[0.41, 0.62]
0.54***
[0.42, 0.66]

Observations 256 255 252

Adjusted R2 0.150 0.350 0.261

95% confidence intervals are shown in brackets

p < 0.05, ** p < 0.01, *** p < 0.00

Outcome variables are the paired differences between preoperative and postoperative pain VAS scores (delta radicular pain, delta neck pain and delta headache).