Table 4:

Correlation between neurotransmitter and psychological tests

		bp-GABA/Cr	gm-GABA/Cr	wm-GABA/Cr	bp-GLX/Cr	gm-GLX/Cr	wm-GLX/Cr
IAT	r	0.345	0.387	0.252	–0.088	–0.029	–0.192
IAT	P value	.034^{^a}	.016^{^a}	.127	.599	.863	.249
SAS	r	0.300	0.323	0.250	–0.209	–0.172	–0.240
SAS	P value	.067	.048^{^a}	.129	.209	.302	.146
IAT+SAS	r	0.336	0.372	0.260	–0.144	–0.093	–0.219
IAT+SAS	P value	.039^{^a}	.022^{^a}	.116	.388	.578	.186
HRSD	r	0.312	0.326	0.298	–0.201	–0.17	–0.201
HRSD	P value	.057	.046^{^a}	.069	.227	.308	.227
State STAI	r	0.327	0.348	0.274	0.075	0.096	0.028
State STAI	P value	.045^{^a}	.032^{^a}	.095	.655	.566	.867
Trait STAI	r	0.294	0.305	0.263	–0.197	–0.173	–0.212
Trait STAI	P value	.073	.062	.111	.235	.300	.202
Total STAI	r	0.335	0.350	0.291	–0.071	–0.048	–0.097
Total STAI	P value	.040^{^a}	.031^{^a}	.077	.674	.770	.564
BIS	r	0.132	0.145	0.109	–0.06	–0.042	–0.079
BIS	P value	.429	.386	.513	.72	.800	.637
ISI	r	0.073	0.037	0.139	–0.386	–0.419	–0.255
ISI	P value	.664	.824	.405	.017^{^a}	.009^{^a}	.123
PSQI	r	0.235	0.194	0.305	–0.405	–0.439	–0.264
PSQI	P value	.155	.242	.063	.012^{^a}	.006^{^a}	.109

Note:—PreTx indicates precognitive behavioral therapy; PostTx, postcognitive behavioral therapy; IAT, Internet Addiction Test; SAS, Smartphone Addiction Scale; HRSD, Hamilton Rating Scale for Depression; STAI, State-Trait Anxiety Inventory; BIS, Barratt Impulsiveness Scale; ISI, Insomnia Severity Index; PSQI, Pittsburgh Sleep Quality Assessment.
↵a P value ≤ .05.