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Table 3 Mixed model for repeated measurements

From: Pelvic joint fusion in patients with severe pelvic girdle pain – a prospective single-subject research design study

 

Pre-operative score constant value (95% CI)

Regression coefficient (95% CI)

Score at 1-year follow-up

ODI

54.2

(48.4-59.9)

-5.7

(-7.6- -3.8)

p < 0.001

37.1

VAS in the morning

59.5

(45.6-73.5)

-4.8

(-9.0- -0.7)

p = 0.019

45.1

VAS in the evening

81.7

(76.3-87.2)

-8.4

(-12.3- -4.5)

p < 0.001

56.5

SF-36

      

Physical functioning

21.5

(8.8-34.3)

7.0

(3.2-10.8)

p < 0.001

42.5

Role physical

2.8

(-6.7-12.3)

2.6

(-1.1-6.3)

p = 0.169

10.6

Bodily pain

13.1

(4.7-21.6)

6.8

(4.2-9.4)

p < 0.001

33.5

General health

48.4

(34.9-61.9)

2.0

(0.5-3.5)

p = 0.009

54.4

Vitality

42.8

(33.3-52.4)

1.5

(-0.7-3.6)

p = 0.174

47.3

Sosial functioning

41.8

(22.4-61.2)

5.2

(1.3-9.0)

p = 0.008

57.4

Role emotional

55.1

(24.8-86.2)

2.6

(-1.7-7.0)

p = 0.240

62.9

Mental health

75.1

(64.1-86.1)

-1.0

(-2.7-0.7)

p = 0.224

72.1

  1. ODI, VAS and individual items of SF-36 as dependent variables and time as independent variable. Regression line: constant + regression coefficient × time (time is defined as; 0 = baseline, 1 = 3 months, 2 = 6 months, 3 = 12 months). Score at 1-year follow-up = constant value at baseline + 3 times regression coefficient.