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Table 3 Known-group analysis: baseline scores of the KCCQ by NYHA class

From: Psychometric properties of the Japanese version of the Kansas City Cardiomyopathy Questionnaire in Japanese patients with chronic heart failure

KCCQ

Scores (mean ± SD)

P valuea

NYHA I

(n = 12)

NYHA II

(n = 108)

NYHA III

(n = 18)

NYHA IV

(n = 3)

Domains

 Physical limitationsb

90.6 ± 9.3

73.2 ± 25.1

51.4 ± 24.7

64.6 ± 2.9

<  0.001

 Symptom frequency

91.3 ± 10.3

66.6 ± 29.9

54.2 ± 27.1

43.8 ± 32.3

<  0.001

 Symptom severity

95.1 ± 6.6

78.0 ± 21.2

69.9 ± 24.6

63.9 ± 9.6

<  0.001

 Symptom stability

64.6 ± 22.5

64.4 ± 30.0

54.2 ± 33.5

75.0 ± 25.0

0.592

 Self-efficacy

77.1 ± 21.9

69.3 ± 25.4

75.7 ± 19.9

50.0 ± 45.1

0.692

 Social limitationsc

59.7 ± 40.8

61.4 ± 34.6

44.8 ± 31.1

54.2 ± 41.2

0.151

 Quality of life

73.6 ± 16.2

55.8 ± 24.4

44.4 ± 21.6

55.6 ± 24.1

0.003

Summary scores

 Total symptom score

93.2 ± 7.2

72.3 ± 24.8

62.0 ± 24.1

53.8 ± 20.4

<  0.001

 Clinical summary score

91.9 ± 6.8

72.2 ± 22.8

57.4 ± 21.3

54.2 ± 18.4

<  0.001

 Overall summary score

80.0 ± 12.5

65.4 ± 23.2

51.4 ± 20.5

53.5 ± 20.8

<  0.001

  1. aThe trend was tested by the Jonckheere-Terpstra test
  2. bCalculated for 127 patients (n = 12 for NYHA I, 96 for NYHA II, 17 for NYHA III, and 2 for NYHA IV) due to responses coded as missing data in question 1 (6 items)
  3. cCalculated for 118 patients (n = 11 for NYHA I, 91 for NYHA II, 14 for NYHA III, and 2 for NYHA IV) due to responses coded as missing data in question 15 (4 items)
  4. KCCQ Kansas City Cardiomyopathy Questionnaire; NYHA New York Heart Association; SD standard deviation
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Health and Quality of Life Outcomes

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