Table 3.

Relationships between Symptoms of Internet Gaming Disorder and Internet Gaming Disorder Diagnosis

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
1. Preoccupation with Internet games	56.3	93.3	13.6	99.1
2. Withdrawal	17.7	98.0	12.8	98.5
3. Tolerance	93.8	78.4	7.5	99.9
4. Unsuccessful attempts to control	93.5	83.2	9.1	99.9
5. Loss of interest	62.2	98.7	56.0	99.0
6. Continued excessive use despite psychosocial problems	48.5	98.7	42.1	99.0
7. Deception	54.5	96.4	22.5	99.1
8. Escape or relieve negative mood	68.8	98.7	50.0	99.4
9. Jeopardized or lost relationship or educational career opportunity	31.3	98.7	31.3	98.7

Sensitivity = Percentage of diagnosed children having the symptom; Specificity = Percentage of children without diagnosis not having the symptom; PPV = Positive predictive value – Percentage of children with the symptom that receive a diagnosis, NPV = Negative predictive value – Percentage of children without the symptom that do not receive a diagnosis