Table 4.

Inter-item correlation matrix

Items	1	2	3	4	5	6
1. I am worried about the anesthesia	1.00
2. The anesthesia is on my mind continuously	0.70	1.00
3. I would like to know as much as possible about the anesthesia	0.45	0.43	1.00
4. I am worried about the procedure	0.48	0.42	0.31	1.00
5. The procedure is on my mind continuously	0.44	0.51	0.38	0.62	1.00
6. I would like to know as much as possible about the procedure	0.19	0.12	0.31	0.34	0.40	1.00