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Table 5 Mixed linear model for the Short-Form 36 component summaries

From: Chronic low back pain: a prospective study with 4 to 15 years follow-up after a multidisciplinary biopsychosocial rehabilitation program

Fixed effect

Visit

Estimate

p-value

Physical component summary

 Intercept

 

53.75

0.00

 Time point

Before entry (T0)2

0.28

0.75

 Time point

Entry (T1)3

0.00

 

 Time point

Discharge (T2)4

2.63

 < 0.0026

 Time point

Follow-up (T3)5

1.25

0.20

 Baseline Score

 

-2.18

 < 0.0001

 Age

 

-0.14

0.07

 Male

 

0.57

0.67

Mental component summary

 Intercept

 

47.64

 < 0.0001

 Time point

Before entry (T0)2

-1.51

0.13

 Time point

Entry (T1)3

0.00

 

 Time point

Discharge (T2)4

2.71

0.01

 Time point

Follow-up (T3)5

-0.83

0.46

 Baseline Score

 

-0.27

0.61

 Age

 

0.06

0.54

 Male

 

1.26

0.45

  1. 1df: Degrees of freedom
  2. 2T0: Assessment before multidisciplinary biopsychosocial rehabilitation
  3. 3T1: Start of the multidisciplinary biopsychosocial rehabilitation
  4. 4T2: End of the multidisciplinary biopsychosocial rehabilitation
  5. 5T3: Long-term follow-up occurring 4–15 years after the multidisciplinary biopsychosocial rehabilitation