Quantitative agreement in the detection of the P2 peak (primary outcomes).

<p>The boundaries of the boxes indicate the 25^th and 75^th percentiles, the line within the box marks the median, the whiskers indicate the 10^th and 90^th percentiles and the circles above and below represent outliers (<i>n</i> = 16 for each index). Horizontal lines on top of the bars represent statistically significant post hoc differences between pairings (Student-Newman-Keuls, <i>p</i> < 0.05). LoA: limits of agreement, CV: coefficient of variation.