Table 2.
Methodological characteristics included in the study.
| First author (year) | Diagnostic criteria | MRI scanner | Methods | MRI head coil | Research types | NOS quality score |
|---|---|---|---|---|---|---|
| Xin Du (32) | Young's Diagnostic Questionnaire for IA | Siemens MRI scanner (3T) | FCD | – | Case-control | 5 |
| Qi Feng (33) | (1) DSM-IV (2) The modified Diagnostic Questionnaire for IA criteria by Beard |
GE MRI scanner (3T) | CBF | Standard | Case-control | 6 |
| Xu Han (34) | The modified Diagnostic Questionnaire for IA criteria by Beard | GE MRI scanner (3T) | ALFF, seed-based FC | Standard | Case-control | 5 |
| Heejung Kim (16) | (1) DSM-V (2) YIAT |
Philips MRI scanner (3T) | ReHo | Standard | Case-control | 7 |
| Jun Liu (13) | The modified Diagnostic Questionnaire for IA criteria by Beard | Siemens MRI scanner (3T) | ReHo | Standard | Case-control | 5 |
| Lu Liu (35) | – | Siemens MRI scanner (3T) | FC | – | Case-control | 5 |
| Yawen Sun (14) | The modified Diagnostic Questionnaire for IA criteria by Beard | GE MRI scanner (3T) | ALFF, seed-based FC | Standard | Case-control | 6 |
| Yao Wang (15) | (1) DSM-IV (2) The modified Diagnostic Questionnaire for Internet Addiction criteria by Beard |
GE MRI scanner (3T) | FC | Standard | Case-control | 6 |
| Lubin Wang (36) | The modified Diagnostic Questionnaire for IA criteria by Beard | Philips MRI scanner (3T) | ICA | – | Case-control | 8 |
| Yang Wang (37) | Young's Diagnostic Questionnaire for IA | GE MRI scanner (3T) | FCD | Standard | Case-control | 6 |
ALFF, amplitude of low-frequency fluctuation; CBF, cerebral blood flow; DSM, the diagnostic and statistical manual of mental disorders; FC, functional connectivity; FCD, functional connectivity density; IGD, Internet gaming disorder; IA, internet addiction; IAD, internet addiction disorder; ICA, independent component analysis; IGA, internet gaming addiction; NOS, Newcastle-Ottawa scale; PIU, pathological Internet use; ReHo, regional homogeneity; YIAT, young's Internet addiction test.