Table 2 Results obtained from exploratory factor analysis for the CHFQOLQ (n = 160)
| Â | Items | Factor 1 (Physical functioning) | Factor 2 (Cognitive functioning) | Factor 3 (General health) | Factor 4 (Mental health) |
|---|---|---|---|---|---|
| Â | Due to chronic heart failure, in the past 4 weeks: | Â | Â | Â | Â |
1 | Have you had trouble walking around the house? | 0.789 | 0.000 | -0.073 | 0.126 |
2 | Did you have trouble taking a short walk (one block or around 100Â m)? | 0.888 | -0.079 | -0.032 | 0.084 |
3 | Did you experience difficulty in doing house chores (such as gardening, moving things, vacuum cleaning, or daily grocery shopping)? | 0.894 | -0.052 | -0.022 | 0.030 |
4 | Did you have trouble climbing up the stairs one floor with no rest? | 0.9 | 0.006 | 0.014 | -0.047 |
5 | Did you have trouble fast walking for a few blocks or over 100Â m? | 0.876 | -0.041 | 0.041 | -0.091 |
6 | Did you experience difficulty in lifting heavy things (such as furniture or suitcase)? | 0.838 | -0.010 | -0.043 | -0.115 |
7 | Did you have to lie-down or sit down during the day? | 0.757 | 0.132 | 0.005 | -0.010 |
8 | Did you experience trouble in exercising, leisure activities or going on a trip? | 0.630 | 0.088 | 0.114 | 0.107 |
9 | Did you feel fatigue and low energy level? | 0.464 | 0.163 | 0.159 | 0.155 |
10 | Did you experience dyspnea during physical activities? | 0.608 | 0.071 | 0.183 | -0.023 |
11 | Did you have problem concentrating (e.g. concentration in reading a topic or watching TV)? | 0.087 | 0.752 | -0.011 | 0.062 |
12 | Did you have problem remembering things related to a few days earlier (e.g. remembering the location of things or an appointment)? | -0.053 | 0.899 | 0.045 | -0.104 |
13 | Did you have limitation in learning new topics or skills? | -0.017 | 0.875 | 0.035 | 0.050 |
14 | Did you have problem in making decisions? | 0.087 | 0.522 | -0.142 | 0.423 |
15 | How do you estimate your current general health status? | -0.019 | -0.015 | 0.867 | 0.072 |
16 | How do you assess your current health status in comparison with the past year? | 0.046 | -0.024 | 0.879 | -0.088 |
17 | How do you estimate your current quality of life? | -0.008 | 0.060 | 0.742 | 0.091 |
18 | Do you feel as you are a burden to others? | 0.360 | 0.035 | 0.038 | 0.501 |
19 | Do you feel sad and depressed? | 0.131 | 0.080 | 0.142 | 0.569 |
20 | Do you feel useless and worthless? | 0.083 | -0.041 | 0.145 | 0.735 |
21 | Do you have self-confidence* | -0.120 | -0.016 | -0.027 | 0.757 |
| Â | Eigen values | 8.823 | 2.080 | 1.618 | 1.265 |
| Â | Variance (%) | 42.016 | 9.906 | 7.705 | 6.025 |