Articles by [email protected]

Calculate all the CVs of all the QC Levels of all the Methods of all the Instruments at all the Sites all at once … with Sunquest LIS and dplyr

February 4, 2020 | [email protected]

Background As part of our lab accreditation requirements, we have to provide measurement uncertianty estimates for all tests at all hospital sites. As you might imagine, with thousands of testcodes in Sunquest LIS, getting all the coefficients of variation (CVs) represents a daunting task for the quality technologist to accomplish. ...
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Break up with Excel: Intro and Advanced R Data Science Courses at MSACL.org Salzburg Austria, September 21–23, 2019

August 30, 2019 | [email protected]

MSACL Conference There are two RStats Data Science courses happening in Salzburg Austria on September 22–24, 2019 at the 6th annual MSACL Clinical Mass Spectrometry Conference. These courses are held twice annually, once in Europe and once in Palm Springs. Introductory Course The introductory course will be taught by Dan Holmes, MD ...
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Conditional Formatting of a Table in R

November 7, 2016 | [email protected]

Background There are a few ways to approach the problem of a conditionally formatted table in R. You can use the ReporteRs package's FlexTable() function, the formattable package, or the condformat package. These allow you to produce a conditionally formatted tables in HTML. You can also use xtable package and ... [Read more...]

Making Youden Plots in R

October 15, 2015 | [email protected]

Background I was honoured by a site visit by Drs. Yeo-Min Yun and Junghan Song of the Korean Society for Clinical Chemistry a few weeks ago. As both professors are on the organizing committee of the Cherry Blossom Symposium for Lab Automation in Seoul in Spring 2016, their primary motivation for ...
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Deming and Passing Bablok Regression in R

September 14, 2015 | [email protected]

Regression Methods In this post we will be discussing how to perform Passing Bablok and Deming regression in R. Those who work in Clinical Chemistry know that these two approaches are required by the journals in the field. The idiosyncratic affection for these two forms of regression appears to be ...
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NA NA NA NA, Hey Hey Hey, Goodbye

September 5, 2015 | [email protected]

Removing NA’s from a Data Frame in R The Problem Suppose you are doing a method comparison for which some results are above or below the linear range of your assay(s). Generally, these will appear in your spreadsheet (gasp!) program as ( y) or, in the case of our ...
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A Closer Look at TAT Time Dependence

August 28, 2015 | [email protected]

The Problem We want to have a closer look at the time–dependence of turn around times (TATs). In particular, we would like to see if there is a significant trend in TAT over time (improvement or deterioration) and we would like the data to inform us of slowdowns and ...
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