. 2019 Mar 8;9:3951. doi: 10.1038/s41598-019-40133-4

Table 3.

Partial correlations between continuous predictor variables and 12-month tic severity (YGTSS total tic score) controlling for baseline tic severity.

Predictor	n	Pearson Correlation		Spearman Correlation
Predictor	n	partial r	p value	partial r	p value
PUTS total	34	0.094	0.602	0.063 ^†	0.727 ^†
DCI total	38	0.327	0.048	0.320 ^†	0.054 ^†
ADHD Rating Scale	39	0.103	0.538	0.089 ^†	0.594 ^†
CY-BOCS	38	0.12	0.479	0.195 ^†	0.246 ^†
Age at tic onset	39	0.264	0.11	0.192 ^†	0.248 ^†
Interval_between_visits	39	−0.202	0.225	−0.193	0.247
K-Bit IQ	39	−0.13	0.438	−0.05	0.766
SES	39	−0.228	0.169	−0.174 ^†	0.297 ^†
SRS total T scores	39	0.482	0.002	0.312 ^†	0.056 ^†
- SRS awareness T scores	39	0.111	0.506	0.079	0.637
- SRS cognition T scores	39	0.232	0.16	0.251	0.128
- SRS communication T scores	39	0.479	0.002	0.381 ^†	0.018 ^†
- SRS motivation T scores	39	0.498	0.001	0.414 ^†	0.010 ^†
- SRS mannerisms T scores	39	0.542	0.000	0.389 ^†	0.016 ^†
CBCL - A-A-A (DESR)	39	0.362	0.026	0.406 ^†	0.011 ^†
- CBCL - Anxious/Depressed	38	0.431	0.008	0.400 ^†	0.014 ^†
- CBCL - Attention Problems	39	0.328	0.045	0.244 ^†	0.139 ^†
- CBCL - Aggressive Behavior	39	0.242	0.143	0.268 ^†	0.103 ^†

Dagger (^†) in the Spearman correlation columns indicates that the data were not normally distributed (tested by Shapiro-Wilk test). CBCL = Child Behavior CheckList; CY-BOCS = Child Yale-Brown Obsessive Compulsive Scale; DCI = Diagnostic Confidence Index; DESR = deficient emotional self-regulation; PUTS = Premonitory Urge for Tics Scale; SES = socioeconomic status; SRS = Social Responsiveness Scale.