Table 2 Values of sensitivity, specificity, PPV and NPV of the analyzed US characteristics (parameters)

96 (90–99)

46 (36–56)

64 (56–72)

92 (80–98)

93 (86–97)

65 (54–74)

73 (64–80)

90 (80–96)

86 (77–92)

98 (93–99)

97 (92–99)

87 (80–93)

94 (87–97)

21 (13–30)

54 (46–61)

77 (57–91)

84 (75–90)

78 (68–85)

79 (70–86)

82 (73–89)

77 (67–84)

70 (60–78)

72 (62–80)

75 (65–83)

76 (66–84)

65 (56–74)

68 (59–77)

73 (62–82)