Abstract Historically, the surgical literature was defined based on a predominance of case series, case reports, and anecdotal experiences of surgical investigators. But over the past several decades, the methodologic..
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Abstract Background: Congenital heart disease (CHD) occurs in approximately 1% of all live births, and 3% to 8% of these have until now been considered familial cases, defined as the..
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Abstract When designing a clinical study, a fundamental aspect is the sample size. In this article, we describe the rationale for sample size calculations, when it should be calculated and..
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Abstract When designing a clinical study, a fundamental aspect is the sample size. In this article, we describe the rationale for sample size calculations, when it should be calculated and..
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Abstract Survival analysis incorporates various statistical methods specific to data on time until an event of interest. While the event is often death, giving rise to the phrase ‘survival analysis’,..
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