Table 2.

Performance statistics of the automated artifact detector as compared to visual artifact scoring, when considering only the visually scored artifacts having total power greater than the 99% percentile.

	NREM epochs (N=86,250)							REM epochs (N=20,717)
Th	N art	sens	spec	acc	PPV	NPV	K	N art	sens	spec	acc	PPV	NPV	K
1	579	81.35	97.23	97.12	16.57	99.87	0.27	170	75.29	97.19	97.01	18.16	99.79	0.28
2	560	82.14	97.22	97.12	16.18	99.88	0.26	159	78.62	97.18	97.04	17.73	99.83	0.28
3	443	84.88	97.12	97.06	13.23	99.92	0.22	122	82.79	97.07	96.98	14.33	99.90	0.24
4	306	86.60	97.00	96.96	9.32	99.95	0.16	90	85.56	96.96	96.91	10.92	99.94	0.19
5	163	87.73	96.86	96.85	5.03	99.98	0.09	51	88.24	96.81	96.79	6.38	99.97	0.11
6	66	86.36	96.77	96.76	2.00	99.99	0.04	28	85.71	96.71	96.69	3.40	99.98	0.06
7	41	80.49	96.74	96.73	1.16	99.99	0.02	11	90.91	96.64	96.64	1.42	100.00	0.03
8	28	71.43	96.73	96.72	0.70	99.99	0.01	8	87.50	96.63	96.63	0.99	100.00	0.02
9	20	70.00	96.72	96.71	0.49	99.99	0.01	6	83.33	96.62	96.62	0.71	100.00	0.01
10	18	72.22	96.72	96.71	0.46	99.99	0.01	5	80.00	96.62	96.61	0.57	100.00	0.01

Th: sub-epoch threshold indicating the minimum number of visually identified artifactual 4-s sub-epochs that needed to be present within a 30-s epoch in order to consider this epoch as artifactual. N art: number of 30-s epochs that are considered artifactual with the corresponding sub-epoch threshold. Sens: sensitivity; spec: specificity; acc: accuracy; PPV: positive predictive value; NPV: negative predictive value; K: Cohen’s kappa. The automated pipeline detected 2843 epochs with artifact in NREM and 705 epochs with artifact in REM.