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).