Table 2 |
||||||
|
Contributions of the variables to 1-year SF-36 Mental Health scores |
||||||
|
Correlation (r) with |
||||||
|
Quantitative variables |
Mean |
STD |
1 year SF36-MH |
R2 |
p-value |
|
|
|
|
|||||
|
Mean bodily pain at 3 and 6 month |
2.03 |
1.11 |
-0.450 |
0.203 |
<0.0001 |
|
|
Baseline SF36-MH |
61.62 |
18.15 |
0.436 |
0.190 |
<0.0001 |
|
|
Baseline bodily pain |
3.9 |
0.99 |
0.118 |
0.014 |
0.1642 |
|
|
Age |
42.84 |
10.07 |
0.042 |
0.002 |
0.623 |
|
|
|
|
|||||
|
1 year SF36-MH |
||||||
|
Categorical variables |
Category |
n |
Mean |
STD |
||
|
|
|
|||||
|
Sex |
Male |
86 |
74.88 |
20.34 |
0.001 |
0.724 |
|
Female |
55 |
73.60 |
21.92 |
|||
|
Workers' compensation |
Yes |
42 |
68.00 |
25.05 |
0.040 |
0.018 |
|
No |
99 |
77.09 |
18.44 |
|||
|
Crossover |
0 month |
120 |
76.83 |
18.54 |
0.079 |
0.001 |
|
3 or 6 month |
21 |
60.38 |
28.03 |
|||
|
R2 from the model including all above variables |
0.435 |
|||||
|
|
||||||
|
Note: R2 was calculated using the model including only one variable. In covariate selection, linear regression with backward selection method (p = 0.1) was applied, where 1 year SF-36 MH was the dependent variable; age, sex, workers' compensation, baseline bodily pain, prior episodes, and the SF-36 General Health, Vitality, Social Function, and Emotional Role subscales were independent variables; and age, sex and workers' compensation were fixed in the model. 141 of 162 surgical patients with both 1 year mood data and all 7 covariates and DNA were used in the 1 year mood analysis. "Crossover" refers to the time point when a questionnaire showed that a patient who initially chose nonsurgical treatment underwent lumbar discectomy. |
||||||
|
Max et al. Molecular Pain 2006 2:14 doi:10.1186/1744-8069-2-14 |
||||||
