Records could be an intimidating topic for plenty of scholars and clinicians. This concise textual content introduces uncomplicated innovations that underpin scientific records and, utilizing daily medical examples, highlights the significance of statistical ideas to knowing and enforcing examine findings in regimen medical care. it's a software for college students, clinicians in education, nurses, GPs and health facility experts.

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Additional info for Basic Skills in Statistics: A Guide for Healthcare Professionals

Sample text

The true disease state might be defined on the basis of a pathological test or a highly reliable diagnostic test, which is considered to be the ‘gold standard’. The proportion of cases correctly diagnosed by the test is called its sensitivity, and the proportion of negative results from the tests in healthy subjects is called the specificity of the test. 2 Kappa test for agreement Rater 1 Rater 2 a a di b c Ri Total Ci d2 b Total c R2 C2 d3 C3 R3 T Let two raters use a 3-point scale: a, b and c.

1). The relationship is often more accurately described simply as an association between the two variables, with no claims being made about causality. Two variables are associated if knowledge about one tells us something about the other. 1 details the main types of relationship that can exist between two variables. Relationship between two continuous variables The first step in establishing a relationship between two continuous variables is to examine them together graphically. The graph used is a scatter plot in which one axis is a scale based on one variable and the other is a scale based on the other variable.

These three questions sometimes follow each other in order: the scale of a problem needs to be assessed first, contributory factors are then identified, and finally potential solutions can be tested. Clear outcome measures Another key consideration is the choice of suitable outcome measures. Of particular importance is the need to distinguish between so-called ‘primary’ and ‘secondary’ outcome measures. Primary outcome measures are used as the basis for sample size calculations and should, ideally, satisfy certain characteristics.