JAMA Network Open · 2020 · 29 citations · 41 references
This study found that higher rates of surgery for treatment of patients with PHF were associated with increased costs, adverse event rates, and risk of mortality. Orthopedic surgeons should be aware of the harms of extending the use of surgery to more clinically vulnerable patient subgroups.
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Some Methods for Strengthening the Common χ 2 Tests
William G. Cochran · Biometrics · 1954 · 3.6K citations
Tests for Linear Trends in Proportions and Frequencies
P. Armitage · Biometrics · 1955 · 2.1K citations