“…9 When these values were used to calculate LDL cholesterol, no significant differences were found. 9 Dale et al compared the performance of the Cholestech LDX versus the CardioChek PA and found the Cholestech LDX device to be superior. 10 Similar results were obtained by Shepherd et al who stated that the “CardioChek PA device requires further study and refinement.” 11 All of these studies were published in 2008 and 2007, and since that time, Polymer Technology Systems, the makers of the CardioChek machines, have updated their technology and improved their testing device.…”