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Table 3 Baseline ceiling, floor effects, and Cronbach’s alpha coefficients of the KCCQ and SF-36 scales, MAHFER study

From: Validation of heart failure quality of life tool and usage to predict all-cause mortality in acute heart failure in Uganda: the Mbarara heart failure registry (MAHFER)

HQOL measure

Mean (SD)

Median (IQR)

% Floor effect

% Ceiling effect

Inter-item correlation

Cronbach’s alpha coefficients

KCCQ

 Physical limitation

12.6 (18.9)

0 (0, 25)

59.9

2.5

0.46

0.83

 Symptom stability

51.5 (21.1)

55 (30, 70)

0.1

8.7

0.51

0.86

 Symptom frequency

38.4 (22.9)

31 (25, 50)

3.5

1.0

0.39

0.79

 Symptom burden

40.6 (24.7)

33 (25, 50)

3.5

3.0

0.40

0.80

 Total symptom score

39.5 (23.8)

33 (25, 50)

3.5

1.0

0.48

0.85

 Self-efficacy

58.7 (21.7)

75 (50, 75)

23.5

10.4

0.47

0.84

 Quality of life

23.1 (16.1)

25 (12, 25)

14.8

1.0

0.45

0.83

 Social limitation

11.9 (18.7)

0 (0, 25)

61.7

2.0

0.99

0.99

 Clinical summary score

26.0 (18.6)

20 (12, 38)

3.55

0.5

0.58

0.87

SF-36

 Physical functioning

23.6 (18.5)

20 (5, 40)

0.5

3.7

0.30

0.78

 Physical limitation

4.4 (15.5)

0 (0, 0)

89.1

3.6

0.28

0.75

 Emotional limitation

9.6 (14.4)

12.5 (0, 12)

48.7

3.7

0.27

0.75

 Bodily pain

24.5 (19.9)

10 (10, 42)

7.5

23.7

0.29

0.76

 General health

39.8 (10.7)

40 (30, 45)

2.1

4.7

0.35

0.81

 Mental health

32.3 (9.3)

32 (26, 38)

1.0

99

0.29

0.77

 Social functioning

40.9 (20.1)

37 (25, 62)

23.3

92.2

0.31

0.79

 Energy fatigue

38.5 (15.3)

35 (30, 50)

0.5

3.6

0.34

0.81

 Physical health

22.7 (10.8)

21 (16, 26)

1.3

26.1

0.23

0.71