Table 2 Item statistics and item –total statistics in scale analysis according to anxiety and depression scale
Items of HADS | Mean ± SD | Scale mean if item deleted | Scale variance if item deleted | Corrected item total correlation | Cronbach’s Alpha if item deleted |
|---|---|---|---|---|---|
Anxiety | |||||
A1. I feel tense or wound up | 1.54 ± 0.89 | 9.02 | 13.07 | 0.55 | 0.78 |
A2. I get a sort of frightened feeling as if something bad is about to happen | 1.63 ± 0.87 | 9.11 | 12.52 | 0.66 | 0.76 |
A3. Worrying thoughts go through my mind | 1.66 ± 0.85 | 9.08 | 12.45 | 0.70 | 0.75 |
A4. I can sit at ease and feel relaxed | 1.34 ± 0.89 | 9.40 | 15.85 | 0.11 | 0.85 |
A5. I get a sort of frightened feeling like butterflies in the stomach | 1.65 ± 0.83 | 9.09 | 12.66 | 0.68 | 0.76 |
A6. I feel restless and have to be on the move | 1.47 ± 0.87 | 9.27 | 12.42 | 0.69 | 0.75 |
A7. I get sudden feelings of panic | 1.44 ± 0.91 | 9.30 | 13.42 | 0.47 | 0.79 |
Total score | 10.74 ± 4.17 | – | – | – | 0.81 |
Depression | |||||
D1. I still enjoy the things I used to enjoy | 1.22 ± 0.87 | 7.71 | 12.36 | 0.62 | 0.73 |
D2. I can laugh and see the funny side of things | 1.17 ± 0.86 | 7.76 | 11.91 | 0.72 | 0.71 |
D3. I feel cheerful | 1.09 ± 0.90 | 7.83 | 12.67 | 0.54 | 0.75 |
D4. I feel as if I am slowed down | 1.53 ± 0.92 | 7.40 | 14.68 | 0.20 | 0.81 |
D5. I have lost interest in my appearance | 1.53 ± 0.92 | 7.40 | 13.91 | 0.32 | 0.79 |
D6. I look forward with enjoyment to things | 1.18 ± 0.88 | 7.75 | 12.55 | 0.56 | 0.74 |
D7. I can enjoy a good book or radio or TV program | 1.18 ± 0.88 | 7.75 | 12.25 | 0.64 | 0.73 |
Total score | 8.93 ± 4.11 | – | – | – | 0.78 |