Table 2.
Bivariate correlations between patient demographic and clinical characteristics.
| Gender# | Educational level# | Occupation type# | CCI# | Symptom duration# | Symptom-atology# | Surgery history# | NDI# | mJOA# | VAS-neck | VAS-arm | Depression# | Anxiety# | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gender# | 1 | ||||||||||||
| Educational level# | −0.094 | 1 | |||||||||||
| Occupation type# | −0.07 | −0.439** | 1 | ||||||||||
| CCI# | 0.062 | −0.174** | 0.157** | 1 | |||||||||
| Symptom duration# | −0.044 | −0.081 | 0.077 | 0.024 | 1 | ||||||||
| Symptomatology# | −0.007 | −0.079 | 0.128* | 0.171** | 0.088 | 1 | |||||||
| Surgery history# | −0.062 | −0.021 | −0.007 | 0.031 | 0.246** | 0.063 | 1 | ||||||
| NDI# | 0.238** | −0.088 | 0.09 | 0.064 | 0.024 | 0.181** | 0.013 | 1 | |||||
| mJOA# | −0.113* | −0.138** | 0.236** | 0.130* | 0.172** | 0.409** | 0.219** | −0.078 | 1 | ||||
| VAS-neck | 0.280** | −0.086 | 0.085 | 0.041 | 0.026 | 0.136** | −0.045 | 0.678** | −0.101* | 1 | |||
| VAS-arm | 0.189** | −0.07 | 0.021 | 0.06 | −0.009 | 0.125** | −0.07 | 0.685** | −0.170** | 0.496** | 1 | ||
| Depression# | 0.118* | −0.164** | 0.227** | 0.164** | 0.125* | 0.192** | 0.124* | 0.197** | 0.316** | 0.175** | 0.117* | 1 | |
| Anxiety# | 0.119 | −0.133* | 0.230** | 0.170** | 0.096 | 0.188** | 0.140** | 0.235** | 0.324** | 0.227** | 0.145* | 0.890** | 1 |
| SF-36 PCS | −0.017 | 0.010 | −0.09 | −0.101* | −0.083 | −0.238** | −0.101* | −0.239** | −0.287** | −0.193** | −0.150** | −0.325** | −0.327** |
| SF-36 MCS | −0.081 | 0.106* | −0.202** | −0.112* | −0.078 | −0.132** | −0.091 | −0.201** | −0.192** | −0.216** | −0.132** | −0.587** | −0.559** |
CCI, Charlson comorbidity index; NDI, Neck Disability Index; mJOA, modified Japanese Orthopedic Association score; VAS, Visual Analog Scale; SF-36, 36-item Short-form Health Survey; PCS, physical component summary score; MCS, mental component summary score. #Categorical variables; *p < 0.05; **p < 0.001.