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Table 4 Mixed linear model for the North American Spine Society (NASS) pain + disability scale

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

Intercept

 

0.90

0.02

Time point

Before entry (T0)2

0.17

0.17

Time point

Entry (T1)3

0.00

 

Time point

Discharge (T2)4

-0.72

 < 0.0001

Time point

Follow-up (T3)5

-0.33

0.01

Baseline Score

 

0.65

 < 0.0001

Age

 

0.01

0.07

Male

 

-0.13

0.18

  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