Table 3.

The standardized factor loadings of each item on the corresponding factor and the item-total and item-subscale correlation of the OCDUS

Item	Loading	Item-totalcorrelation	Item-subscalecorrelation
Frequency of craving (FR)
1	0.71	0.70	0.79
2	0.90	0.80	0.90
7	0.81	0.78	0.84
8	0.83	0.78	0.87
12	0.80	0.74	0.85
Inference of heroin (IH)
3	0.91	0.74	0.92
4	0.93	0.75	0.92
9	0.66	0.68	0.83
Control of heroin (CH)
6	0.93	0.57	0.87
13	0.54	0.44	0.86