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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: J Electrocardiol. 2013 Nov 25;47(2):257–263. doi: 10.1016/j.jelectrocard.2013.11.007

Table 4.

ICCs and 95% CIs for P wave indices

Index ICC (95% CI) SEM MDC95
PR Interval (ms) 0.93 (0.90, 0.96) 7.33 20.31
P-axis (°) 0.78 (0.71, 0.86) 7.75 21.47
Maximum P wave area (μV*ms) 0.73 (0.63, 0.84) 1,135.64 3,147.83
Log maximum P wave area (μV*ms) 0.77 (0.67, 0.86) 0.06 0.18
Maximum P wave duration (ms) 0.58 (0.46, 0.70) 7.50 20.78

ICC: Intraclass Correlation Coefficient; SEM: Standard Error of Measurement; MDC95: Minimal Detectable Change