Skip to main content

Table 3 Radiographic evaluation of the angles

From: No added value for Computer-Assisted surgery to improve femoral component positioning and Patient Reported Outcomes in Hip Resurfacing Arthroplasty; a multi-center randomized controlled trial

 

Radiographic evaluation angles (shown as intention to treat)

Radiographic evaluation angles (shown per protocol)

CAS (n = 61)

Conventional

(n = 61)

P Value

CAS (n = 50)

Conventional

(n = 70)

P Value

CCD-Angle, degrees (SD: range)

129,5 (6.1: 117–143)

128,6 (6.5: 115–149)

0.443

129,2 (6.1: 117–143)

128,9 (6.5: 115–149)

0.780

Preplanned SSA, degrees (SD: range)

138,3 (3.8: 128–148)

136,6 (4,8: 127–152)

0.033*

138,0 (3.8: 128–148)

137,1 (4,7: 127–152)

0.281

Post-operative SSA, degrees (SD: range)

136,0 (5.7: 124–150)

134,9 (6,7: 119–153)

0.311

136,3 (5.6: 124–150)

134,8 (6,6: 119–153)

0.196

Difference postoperative SSA minus preplanned SSA

 - Mean, degrees (SD: range)

−2.26 (5.8: −15.25 –12.11)

−1.75 (5.9: − 13.14 –16.21)

0.636

− 1.7 (5.9: − 15.25 – 12.11)

− 2.2 (5.8: − 13.14 – 16.21)

0.592

 - Absolute, degrees (SD: range)

5.14 (3.5: 0.07–15.25)

4.94 (3.5: 0.04–16.21)

0.768

5.0 (3.5)

5.0 (3.5)

0.932

 - > 3 degrees, n (%)

44 (72%)

40 (66%)

0.558

35 (70%)

44 (61%)

0.692

 - > 7 degrees, n (%)

18 (29%)

19 (31%)

0.884

12 (24%)

20 (28%)

0.534

 - > 10 degrees, n (%)

6 (10%)

4 (7%)

0.517

05 (10%)

10 (14%)

0.586

  1. CAS = Computer-Assisted-Surgery, CCD = Centrum-Collum-Diaphysis, SSA = Stem-Shaft-Angle.* significant difference