TABLE 8.

Threshold method results for TOS and SWS compared with VS for skin site.

	Arm				Wrist
+ve VS cycles	118				40
−ve VS cycles	36				11
Total cycles	154				51
Participants	60				20
Thresholds	±1 day		±3 days		±1 day		±3 days
Method	TOS	SWS	TOS	SWS	TOS	SWS	TOS	SWS
TP	61	61	87	103	25	27	32	37
FP	41	52	15	10	12	11	5	1
TN	33	34	33	34	10	11	10	11
FN	19	7	19	7	4	2	4	2
Total cycles	154	154	154	154	51	51	51	51
Sensitivity	76%	90%	82%	94%	86%	93%	89%	95%
Specificity	45%	40%	69%	77%	45%	50%	67%	92%
PPV	60%	54%	85%	91%	68%	71%	86%	97%
NPV	63%	83%	63%	83%	71%	85%	71%	85%
Accuracy	61.0%	61.7%	77.9%	89.0%	68.6%	74.5%	82.4%	94.1%
Upper CI 95%	68.8%	69.4%	84.2%	93.4%	80.9%	85.7%	91.6%	98.8%
Lower CI 95%	52.9%	53.5%	70.5%	82.9%	54.1%	60.4%	69.1%	83.8%
F score	0.67	0.67	0.84	0.92	0.76	0.81	0.88	0.96
Upper CI 95%	0.77	0.77	0.90	0.97	0.89	0.92	0.96	1.00
Lower CI 95%	0.56	0.57	0.75	0.86	0.58	0.63	0.73	0.84

Note. TP, true positive; FP, false positive; TN, true negative; FN, false negative; PPV, positive predictive value; NPV, negative predictive value.