. Author manuscript; available in PMC: 2017 Oct 11.

Published in final edited form as: J Pediatr. 2016 Jul 6;176:167–172.e1. doi: 10.1016/j.jpeds.2016.05.067

Table 2. Correlation between PRIUSS-18 items, proposed PRIUSS-3 scales and PRIUSS-18 Sum.

PRIUSS- 3 version	Subscale	Item	Spearman Correlation with PRIUSS-18 Sum	Factor Loading (SE)^a
3a/b/c	1	Social anxiety: experience increased social anxiety due to your internet use	S=2377082 rho=0.61^***	0.79 (0.04)
3b	2	Irritated: feel irritated when away from the internet	S = 2080401 rho = 0.66^***	0.86 (0.04)
3a	2	Anxious: feel anxious because you are away from the internet	S = 2050761 rho = 0.66^***	0.88 (0.04)
3c	2	Withdrawal: Feel withdrawal when away from the internet	S = 208017 rho = 0.66^***	0.82 (0.04)
3a/b/c	3	Lose motivation: lose motivation to do other things that need to get done because of the internet	S = 1743216 rho=0.71^***	0.76 (0.04)

Factor loadings from paper Jelenchick et al 2014¹¹

^***

All p-values <0.001