The association between attention deficit/hyperactivity disorder and internet addiction: a systematic review and meta-analysis

Table 5 Metaregression of basic characteristics of trials and severity of symptoms in ADHD

Outcome	No. of studies	Factor tested	P	Adjusted R²
Total symptom score	9	age	0.296	2.69%
Total symptom score	9	ethnicity	0.254	6.74%
		risk of bias	0.026	49.92%
Severity of inattention	5	age	0.16	54.94%
Severity of inattention	5	ethnicity	0.421	−5.75%
		risk of bias	0.345	0.80%
Severity of Hyp-Imp	5	age	0.972	−40.99%
Severity of Hyp-Imp	5	ethnicity	0.257	29.91%
		risk of bias	0.022	100.00%

ADHD attention-deficit/hyperactivity disorder; Hyp-Imp hyperactivity-impulsivity

ISSN: 1471-244X