Table 2.

Classification table.

	Prediction value
	Normal users	Smartphone users addicted to the smartphones	Total	Accuracy
Normal users	475	16	491	96.7
Smartphone users addicted to the smartphones	35	67	102	65.7
Total	510	83	593	91.4
-2LL = 240.166, X2 = 304.272(df = 8, p = 0.000), Nagelkerke's R2 = 0.668