Ryan McNeill is a data journalist at Thomas Reuters. Previously, he was a computer-assisted reporting editor at The Dallas Morning News. He was assigned to the investigative unit and oversees the paper's data analysis for news stories.


<p>Parkland Memorial Hospita has for years been one of the state’s worst-performing hospitals on a broad federal measure of patient safety, a Dallas Morning News analysis shows.&nbsp;Hospital representatives accepted the accuracy of the calculations, but they questioned how well the data reflected actual performance and current hospital conditions.&nbsp;</p><div>&nbsp;</div>

<p>So how can a hospital be judged so deficient by federal inspectors, yet rank among the best in U.S. News &amp; World Report?</p><p>It's all in the methodology.</p><div>&nbsp;</div>

<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Times;"><span style="letter-spacing: 0.0px;">To identify rates of potentially preventable medical harm, The Dallas Morning News&nbsp; analyzed nearly 9 million patient-level records from hospitals across Texas.</span></p>