ML to ID Dementia - SVM Accuracy Stats (11-28-22)

PPV by Cutoff Percentile: African Americans

Cutpoint Percentile	PPV
50th	0.07
60th	0.09
70th	0.12
80th	0.18
90th	0.26
95th	0.31

PPV by Cutoff Percentile: European Americans

Cutpoint Percentile	PPV
50th	0.06
60th	0.06
70th	0.09
80th	0.10
90th	0.15
95th	0.22

Prevelance Table

Race	Prevalence
EA	0.041
AA	0.036

Getting CI’s for Accuracy Stats

Race	Cutoff Percentile	Sensitivity	Specificity	PPV	NPV
BA	50th	0.88 (0.52 - 1)	0.48 (0.42 - 0.54)	0.07 (0.06 - 0.1)	0.99 (0.93 - 1)
	75th	0.88 (0.52 - 1)	0.76 (0.75 - 0.77)	0.15 (0.12 - 0.19)	0.99 (0.95 - 1)
	90th	0.6 (0.4 - 0.76)	0.92 (0.91 - 0.92)	0.26 (0.21 - 0.3)	0.98 (0.96 - 0.99)
	95th	0.37 (0.24 - 0.48)	0.97 (0.96 - 0.97)	0.31 (0.24 - 0.38)	0.97 (0.95 - 0.98)
WA	50th	0.86 (0.47 - 1)	0.51 (0.45 - 0.57)	0.06 (0.04 - 0.11)	0.99 (0.94 - 1)
	75th	0.58 (0.31 - 0.85)	0.76 (0.75 - 0.77)	0.08 (0.06 - 0.12)	0.98 (0.93 - 0.99)
	90th	0.42 (0.23 - 0.67)	0.91 (0.91 - 0.91)	0.15 (0.12 - 0.19)	0.98 (0.94 - 0.99)
	95th	0.29 (0.16 - 0.47)	0.96 (0.96 - 0.96)	0.22 (0.15 - 0.28)	0.97 (0.94 - 0.99)

Creating a table using “Stratum_Prop_Sampled”

Race	Cutoff Percentile	Sensitivity	Specificity	PPV	NPV
BA	50th	0.89 (0.53 - 1)	0.48 (0.42 - 0.54)	0.08 (0.06 - 0.1)	0.99 (0.93 - 1)
	75th	0.89 (0.53 - 1)	0.76 (0.76 - 0.77)	0.15 (0.12 - 0.19)	0.99 (0.95 - 1)
	90th	0.61 (0.4 - 0.76)	0.92 (0.91 - 0.92)	0.26 (0.21 - 0.31)	0.98 (0.96 - 0.99)
	95th	0.37 (0.24 - 0.48)	0.97 (0.96 - 0.97)	0.31 (0.25 - 0.39)	0.97 (0.95 - 0.98)
WA	50th	0.86 (0.47 - 1)	0.51 (0.45 - 0.57)	0.06 (0.04 - 0.11)	0.99 (0.94 - 1)
	75th	0.58 (0.31 - 0.85)	0.76 (0.76 - 0.77)	0.09 (0.06 - 0.12)	0.98 (0.93 - 0.99)
	90th	0.43 (0.24 - 0.67)	0.91 (0.91 - 0.92)	0.15 (0.12 - 0.2)	0.98 (0.94 - 0.99)
	95th	0.3 (0.16 - 0.48)	0.96 (0.96 - 0.96)	0.22 (0.16 - 0.29)	0.97 (0.94 - 0.99)

AUC Table

Race	Stratum Used?	AUC	Lower	Upper
EA	Prop	0.7653740	0.5909081	0.8974610
EA	Prob	0.7642913	0.5901424	0.8971481
AA	Prop	0.8616712	0.5917328	0.9483832
AA	Prob	0.8605524	0.5853288	0.9501021