. 2016 Nov 10;4(4):e126. doi: 10.2196/mhealth.5771

Table 3.

Travel-activity confusion matrix between the travel-activity diary and our map-matching algorithm and its interrelationship statistics (cluster defined as 150 m; Gwet agreement coefficient AC1=81%).

Map-matching algorithm	Travel-activity diary				Sens^a %	Spec^b %	PPV^c %	NPV^d %	ACC^e %	F score %
Map-matching algorithm	Home	Work	Others	Trip	Sens^a %	Spec^b %	PPV^c %	NPV^d %	ACC^e %	F score %
Home	758495	5235	29575	26580	94	90	93	91	92	93
Work	10320	257200	10110	9140	85	97	90	96	95	87
Others	20575	23000	104315	15485	61	95	64	95	91	62
Trip	20755	15880	27445	79160	61	95	55	96	92	58

^aSens: sensitivity.

^bSpec: specificity.

^cPPV: positive predictive value.

^dNPV: negative predictive value.

^eACC: Accuracy