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Article
Akupunktur zur Behandlung von Schmerzen im Bereich der Lendenwirbelsäule
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Article
Core decompression in osteonecrosis of the femoral head: risk-factor-dependent outcome evaluation using survivorship analysis
The results of core decompression of the femoral head in the treatment of osteonecrosis are analyzed. This study includes 94 hips in 74 patients with a follow-up time ranging between 18 months and 15 years (av...
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Article
Outcome of cementless hip arthroplasty in rheumatic diseases
We compared the outcome of cementless hip arthroplasty in patients with chronic rheumatic diseases (cases) and patients with osteoarthritis (controls). Between 1985 and 1993 we implanted 26 cementless hips in ...
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Article
The proper sample size in clinical orthopedic trials
A determinant for the evidence of a clinical trial is the magnitude of the sample size. The proper sample size can be easily computed with the knowledge of α, power and effect size. Standard values for α and p...