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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: J Electrocardiol. 2014 Jan 6;47(3):288–293. doi: 10.1016/j.jelectrocard.2014.01.004

Table 4.

Mean difference and standard deviation of interrater and intrarater measures

Variable Mean difference Standard Deviation
P wave duration interrater measures in lead II, (ms) 5.2 17.3
P wave duration intrarater measures in lead II, (ms) −3.6 15.9
P wave amplitude interrater measures in lead II, (μV) −1.8 20.8
P wave amplitude intrarater measures in lead II, (μV) 0.1 9.7
PR interval interrater measures in lead II, (ms) −2.0 19.8
PR interval intrarater measures in lead II, (ms) 1.7 7.8
QT interval interrater measures in lead V5, (ms) 5.0 19.7
QT Interval intrarater measures in lead V5, (ms) 3.7 11.5
QRS duration interrater measures in lead V6, (ms) 3.2 10.6
QRS duration intrarater measures in lead V6, (ms) −0.6 5.5
R wave amplitude interrater measures in lead V6, (μV) −0.8 89.4
R wave amplitude intrarater measures in lead V6, (μV) 11.6 101.1

μV=microvolts, ms=milliseconds