Table 3.

Partial Least Square Regression Using Motor Tract Measurements (X) to Predict Motor Test Scores (Y)^a

Behavioral Tests, Groups	Behavioral Dyscontrol Scale 2			Purdue Pegboard Dexterity Test
		Fragile X-Associated Tremor/ Ataxia Syndrome			Fragile X-Associated Tremor/ Ataxia Syndrome
	Healthy Controls	Negative	Positive	Healthy Controls	Negative	Positive
No. of participants	32	25	35	29	25	32
Explained variance of X, %	28.9	14.5	28.4	24.7	17.3	24.8
Explained variance of Y, %	37.0	42.3	47.0	34.9	36.6	51.5
Correlation (Y, predicted Y)
R	0.41	0.42	0.55	0.31	0.02	0.56
P value	.02	.037b	<.001	.10	.91	<.001
Paired t test (Y, predicted Y)
df	31	24	34	28	24	31
T	−0.005	0.120	−0.094	0.006	0.176	−0.059
95% CI	−1.0 to 1.0	−1.2 to 1.3	−1.8 to 1.6	−2.4 to 2.4	−2.5 to 3.0	−2.1 to 2.0
P value	>.99	.90	.93	>.99	.86	.95

^aThe results from the jackknife are shown. Bold P values are significant at a false discovery rate of 5% for Pearson correlation between Y and predicted Y (P ≤ .02).

^bSignificant at a false discovery rate of 10% (P ≤ .04).