Table 6.

Item-to-total correlations

Items	Item-to-total correlation (corrected for item overlap)	Guttman’s Lambda 6 (squared multiple correlation)	Cronbach’s alpha (if item removed)
1. I am worried about the anesthesia	0.713	0.754	0.769
2. The anesthesia is on my mind continuously	0.704	0.752	0.771
3. I would like to know as much as possible about the anesthesia	0.582	0.794	0.790
4. I am worried about the procedure	0.661	0.771	0.779
5. The procedure is on my mind continuously	0.737	0.755	0.762
6. I would like to know as much as possible about the procedure	0.481	0.805	0.813