Table 3.
Subscale item-to-total correlations and Cronbach’s alpha
| Subscale mean if item deleted |
Scale variance if item deleted |
Corrected item– total correlation |
Cronbach’s alpha if item deleted |
|
|---|---|---|---|---|
| Social Interference | ||||
| 17. How much has your HF limited your enjoyment of life? | 89.78 | 349.69 | 0.750 | 0.923 |
| 18. If you had to spend the rest of your life with | 90.30 | 348.61 | 0.649 | 0.924 |
| HF as it is now, how would you feel about this? | ||||
| 19. How often have you felt discouraged because of your HF? | 89.73 | 360.63 | 0.602 | 0.926 |
| 20. How much does HF affect your … hobbies, recreational activities | 89.86 | 344.40 | 0.669 | 0.924 |
| 21. Working or doing household chores | 90.03 | 341.82 | 0.775 | 0.922 |
| 22. Visiting family or friends out your home | 89.34 | 347.91 | 0.734 | 0.923 |
| 23. Intimate relationships with loved ones | 89.51 | 348.52 | 0.554 | 0.926 |
| Physical Limitations | ||||
| 3. Walking 1 block on level ground | 89.55 | 349.90 | 0.616 | 0.925 |
| 4. Doing yard work, housework or carrying groceries | 90.10 | 346.66 | 0.674 | 0.924 |
| 5. Climbing a flight of stairs without stopping | 90.03 | 342.07 | 0.706 | 0.923 |
| 6. Hurrying or jogging (as if to catch a bus) | 90.69 | 341.75 | 0.587 | 0.926 |
| Symptoms | ||||
| 7. My symptoms have changed over 2 weeks | 89.73 | 359.46 | 0.459 | 0.928 |
| 8. How many times did you have swelling in your feet, ankles or legs when you woke up in the morning | 89.24 | 368.83 | 0.349 | 0.929 |
| 9. How much has swelling in your feet, ankles or legs bothered you? | 88.54 | 359.59 | 0.464 | 0.928 |
| 10. How many times has fatigue limited your ability to do what you want? | 88.78 | 334.69 | 0.694 | 0.924 |
| 11. How much has your fatigue bothered you? | 89.85 | 343.49 | 0.697 | 0.923 |
| 12. How many times has SOB limited your ability to do what you wanted? | 88.48 | 326.87 | 0.780 | 0.922 |
| 13. How much has your SOB bothered you? | 89.51 | 341.81 | 0.731 | 0.923 |
| 14. How many times have you been forced to sleep sitting up in a chair with at least 3 pillows because of SOB? | 89.18 | 359.78 | 0.467 | 0.927 |
| Independent Care | ||||
| 1. Dressing yourself | 88.89 | 369.57 | 0.433 | 0.928 |
| 2. Showering/bathing | 88.83 | 373.26 | 0.338 | 0.929 |
| Self-efficacy | ||||
| 15. How sure are you that you know what to do, or whom to call, if your HF gets worse? | 89.10 | 377.03 | 0.184 | 0.931 |
| 16. How well do you understand what things you are able to do to keep your HF from getting worse? | 89.00 | 379.13 | 0.189 | 0.930 |
SOB, shortness of breath.