Table 2.

Sensitivity, Specificity, Positive Predictive Value (PPV), Negative Predictive Value (NPV), and Accuracy for the Motor tic, Obsession and compulsion, and Vocal tic Evaluation Survey (MOVES) compared with expert clinical assessment by cutoffs

Cutoff	Sensitivity	Specificity	Youden Index	TP	FP	FN	TN	Accuracy
0	100%	0%	0.00	144	73	0	0	66%
1	100%	33%	0.33	144	49	24	0	77%
2	99%	44%	0.42	142	41	32	2	80%
3	97%	63%	0.60	139	27	46	5	85%
4	93%	70%	0.63	134	22	51	10	85%
5*	90%	77%	0.66	129	17	56	15	85%
6	86%	79%	0.66	124	15	58	20	84%
7	82%	84%	0.66	118	12	61	26	82%
8	78%	84%	0.62	113	12	61	31	80%
9	76%	86%	0.62	109	10	63	35	79%
10	74%	90%	0.64	106	7	66	38	79%
11	69%	90%	0.60	100	7	66	44	76%
12	67%	93%	0.60	96	5	68	48	76%
13	59%	96%	0.55	85	3	70	59	71%
14	52%	97%	0.49	75	2	71	69	67%
15	47%	99%	0.45	67	1	72	77	64%
20	28%	100%	0.28	41	0	73	103	53%
25	18%	100%	0.18	26	0	73	118	46%
35	9%	100%	0.09	13	0	73	131	40%
45	1%	100%	0.01	1	0	73	143	34%

TP=true positives; FP=false positives; FN=false negatives; TN=true negative;

^*We identified a cut-off of 5 as optimal for balancing sensitivity and specificity; Other cutoffs may be chosen based on the intended use of the screener.