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Is negative ulnar variance a risk factor for Kienböck's disease? A meta-analysis
K C Chung1, M S Spilson, M H Kim
1Department of Surgery, The University of Michigan Medical Center, Ann Arbor 48109-0340, USA.
Annals of Plastic Surgery
|November 22, 2001
Summary
This study examined the link between negative ulnar variance and Kienböck's disease. Insufficient evidence was found to significantly support this association, challenging current treatment hypotheses.
Area of Science:
- Orthopedic Surgery
- Biostatistics
Background:
- Kienböck's disease treatment often involves joint-leveling procedures.
- These treatments are based on the hypothesis that negative ulnar variance causes the disease.
Purpose of the Study:
- To evaluate the association between negative ulnar variance and Kienböck's disease.
- To assess the quality of existing studies on this topic.
Main Methods:
- A meta-analysis was performed on studies identified through a MEDLINE search.
- Only 3 out of 18 collected studies met the inclusion criteria for data and study design.
- A random-effect model was used to calculate the summary odds ratio (OR).
Main Results:
- The summary OR indicated a 3.10 times higher likelihood of Kienböck's disease with negative ulnar variance, but this was not statistically significant (p = 0.06).
- The confidence interval (95% CI, 0.95-10.05) included 1, indicating a lack of statistical significance.
- Significant heterogeneity was observed across the included studies, leading to an unstable combined OR.
Conclusions:
- There is insufficient data to establish a statistically significant association between negative ulnar variance and Kienböck's disease.
- The current hypothesis linking negative ulnar variance to Kienböck's disease requires further investigation with higher quality studies.