Table 2.

Validation Statistics for the Independent (Top) and Combined (Bottom) Samples

Independent Validation Sample	Using 50% Geo Fixation Cutoff (ASD only as True Pos)	Using 50% Geo Fixation Cutoff (ASD + ASD Features as True Pos)	Using 69% Geo Fixation Cutoff (ASD only as True Pos)	Using 69% Geo Fixation Cutoff (ASD + ASD Features as True Pos)
Validation Statistics	N	N	N	N
True Positives (TP)	43	49	24	25
True Negatives (TN)	190	176	215	196
False Positives (FP)	29	23	4	3
False Negatives (FN)	72	86	91	110
Total Sample Size	334	334	334	334
Sensitivity	37%	36%	21%	19%
Specificity	87%	88%	98%	99%
PPV	60%	68%	86%	89%
NPV	73%	67%	70%	64%
Combined Sample
Validation Statistics	N	N	N	N
True Positives (TP)	58	64	35	36
True Negatives (TN)	260	246	288	269
False Positives (FP)	32	26	4	3
False Negatives (FN)	94	108	117	136
Total Sample Size	444	444	444	444
Sensitivity	38%	37%	23%	21%
Specificity	89%	90%	99%	99%
PPV	64%	71%	90%	92%
NPV	73%	70%	71%	66%