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

TABLE 5. Interobserver Variation for QRSd Validation Studies.

Type Parameter QRS onset QRS offset QRSd
Array-specific (Inline graphic) Mean ± Std. 8.4 ± 7.2 7.9 ± 9.2 15.2 ± 12.0
Median 5.6 5.4 11.3
[Q1, Q3] [3.3, 11.8] [3.0, 10.1] [7.0, 19.1]
Global (Inline graphic) Mean ± Std. 9.6 ± 7.1 6.4 ± 4.4 15.2 ± 10.1
Median 7.3 5.3 12.9
[Q1, Q3] [3.8, 14.3] [3.5, 8.6] [7.5, 19.0]

Parameters reported are mean signed interobserver variation, i.e., the standard deviation of the results of the expert cohort. Q1 = first quartile; Q3 = third quartile.