Table 4 Performance of different modalities to identify undiagnosed COPD in the development cohort

From: An accurate prediction model to identify undiagnosed at-risk patients with COPD: a cross-sectional case-finding study

 

Sensitivity

Specificity

PPV

NPV

Identification of COPD

CAT ≥ 7a

60

65

62

63

%PEFR < 79%a

76

78

77

77

PCOPD ≥ 0.40

82

73

75

81

0.44a

78

79

78

79

0.50

72

83

80

76

0.60

67

86

83

74

0.65

63

90

86

72

0.70

61

91

87

71

  1. %PEFR percent predicted peak expiratory flow rate, CAT COPD assessment test, COPD chronic obstructive pulmonary disease, NPV negative predictive value, PCOPD probability of COPD, PPV positive predictive value
  2. aIndicates the best cutoff value determined by Youden index
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