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. 2018 Jun 5;6:1900211. doi: 10.1109/JTEHM.2018.2844195

TABLE 4. Performance of QRS Measurement Algorithm.

Type Parameter QRS onset QRS offset QRSd
Array-specific (Inline graphic) Mean ± Std. 3.2 ± 13.6 0.3 ± 15.6 –2.8 ± 21.7
Inline graphicMeanInline graphicStd.Inline graphic 10.0 ± 9.8 10.3 ± 11.7 16.6 ± 14.3
Inline graphicMedianInline graphic 8.5 7.5 14.0
[Inline graphic, Inline graphic] [4.0, 12.0] [4.0, 12.0] [7.0, 20.0]
Global (Inline graphic) Mean ± Std. 6.0 ± 9.9 –3.9 ± 7.5 –8.6 ± 12.4
Inline graphicMeanInline graphicStd.Inline graphic 8.0 ± 8.3 7.0 ± 4.7 11.6 ± 9.6
Inline graphicMedianInline graphic 7.0 6.0 10.0
[Inline graphic, Inline graphic] [3.0, 11.0] [4.0, 9.8] [5.0, 16.0]

Parameters reported are mean signed or absolute (indicated by Inline graphic) error, i.e., the difference between the algorithm result and the averaged result from the expert cohort. Q1 = first quartile; Q3 = third quartile.