No rationale for 1 variable per 10 events criterion for binary logistic regression analysis.
Maarten van SmedenJoris A H de GrootKarel G M MoonsGary S CollinsDouglas G AltmanMarinus J C EijkemansJohannes B ReitsmaPublished in: BMC medical research methodology (2016)
The current evidence supporting EPV rules for binary logistic regression is weak. Given our findings, there is an urgent need for new research to provide guidance for supporting sample size considerations for binary logistic regression analysis.
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