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Table 2 Comparison of preoperative and postoperative results

From: Feasibility and anteversion accuracy of a patient-specific instrument for femoral prosthesis implantation in total hip arthroplasty

 

PSI

FRH

p-value

Femoral component

 Planned anteversion

15.46 (13.56–18.72)

16.50 (13.61–21.97)

0.018b

 Actual anteversion

20.02 (15.75–27.80)

23.86 (20.31–30.64)

< 0.001b

 Absolute error anteversion

4.56 (0.60–11.9)

7.38 (0.30–15.00)

< 0.001b

 Anteversion error > 5 (°)

9 (30.00%)

17 (56.67%)

0.037a

 Anteversion error > 10 (°)

1 (3.3%)

5 (16.7%)

0.085a

  1. FRH: free-hand group, PSI: patient-specific instrument group
  2. aChi-squared test
  3. bStudent’s t-test; Values are n (%) or mean (ranges); p-value < 0.05 considered statistically significant
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