StatsMiniBlog: Z scores.

A recent journal club article, the exact nature of which is irrelevant, triggered a coffee-room discussion on the subject of z scores, which although often understood in relation to Bone Mineral Density reports are otherwise a statistical challenge. In particular the difficulties in interpreting them in a meaningful way were lamented by our team. […]

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The Cabin of Dr. Ladhani

Hot on the heels of thinking about thresholds for action and inaction comes a really interesting paper looking at the risk of serious infection in children with blood or CSF cultures taken in the South East of England (in 1m – 15y olds). Before going on – what proportion of cultures do you think were […]

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Springing into action

If you could get a multiplex PCR result back to you within 2 hours that told you your hot, grumpy, 2 month old patient did not have bacteraemia, would you discontinue antibiotics? How sure would you need to be of that result – 95% certain? 98% certain? 99.5% certain? What – in diagnostic analysis speak […]

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What’s in a name?

A guest post from @tweediatrics. Last week, a discussion surfaced on Twitter regarding the use of “affectionate” names with patients. It started from this, tweeted by an A+E consultant in the UK: “Colleague disciplined for calling a 90 yr old lady ‘my dear’ & ‘darling’. She had no issues with them. Are we being too PC? […]

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Gambling, alcohol and division.

No, not an average afternoon at the Houses of Parliament, but another in our diagnostics series. Moving yourself from looking at the predictive values of the tests as evaluated, to taking this information but using it in the situation you face, is a case of Bayesian mathematics. Which sounds hard. But its absolutely what you […]

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