Table 6.

Summary of principal component analysis for children’s usage data for the Online Remote Behavioral Intervention for Tics intervention (n=111).

Item	Factor loadings
	Factor 1: engagement	Factor 2: sporadic use
Number of log-ins	0.90	—a
Chapters completed	0.79	—
Total therapist time per child	0.76	—
Total number of characters submitted	0.74	—
Number of days between log-ins	−0.63	0.54
Number of pages visited per log-in	−0.41	0.80
Telephone time with the therapist	−0.44	−0.46
Eigenvalue	3.3	1.5
Percentage of variance	47	21

^aItem not loaded onto factor.