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Table 2 Relation of independent variables on preoperative pain and change in pain preoperatively to the one year follow-up

From: Association between knee alignment and knee pain in patients surgically treated for medial knee osteoarthritis by high tibial osteotomy. A one year follow-up study

 

Preoperative Pain

Change in Pain

 

Δ*

95% CI

p-value

Δ**

95% CI

p-value

Gender

-6.3

-12.6 - 0.1

0.06

-1.2

-9.6 - 7.1

0.8

Age

-0.7

-0.5 - 0.4

0.8

0.2

-0.4 - 0.8

0.5

BMI kg/m2

-1.1

-1.9 - -0.2

0.01

-0.8

-1.9 - 0.2

0.1

OA grade#

      

grade 2

0.6

-7.9 - 9.2

0.9

-10.4

-21.5 - 0.7

0.07

grade ≥3

1.9

-6.6 - 10.4

0.7

-6.4

-17.2 - 4.3

0.2

Preoperative HKA-angle

0.3

-0.4 - 1

0.4

   

Change in HKA-angle ##

   

0.4

-0.6 - 1.4

0.4

Complications

   

-1.4

-10.4 - 7.6

0.8

Preoperative Pain

   

-0.5

-0.7 - -0.3

<0.0001

  1. * Estimated change of preoperative pain per unit change independent variable
  2. ** Estimated change of change in pain (preoperatively to the one year follow-up) per unit
  3. change of independent variable
  4. # OA grade according to the Ahlbäck (Ahl) classification, reference Ahl grade 1
  5. ## preoperative minus postoperative HKA-angle