Table 6 Item-to-total correlations
From: Validation of the Portuguese version of Amsterdam Preoperative Anxiety and Information Scale (APAIS)
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 |