Table 2 Efficacy of different models in predicting pathological responses after NAC in advanced gastric cancer in the training and validation groups

Training group

 AUC

0.943

0.846

0.949

0.756

0.955

0.898

0.960

 95% CI

0.896–0.974

0.781–0.898

0.903–0.978

0.682–0.820

0.910–0.981

0.840–0.940

0.917–0.984

 p value

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 < 0.0001

 ACC (%)

89.44

74.53

90.06

73.91

93.79

83.85

91.93

 SEN(%)

86.73

63.27

93.88

81.63

93.88

86.73

93.88

 SPE(%)

93.65

92.06

84.13

61.90

93.65

79.37

88.89

 PPV(%)

95.51

92.54

90.20

76.92

95.83

86.73

92.93

 NPV(%)

81.94

61.70

89.83

68.42

90.77

79.37

90.32

Validation group

 AUC

0.778

0.701

0.815

0.672

0.808

0.759

0.843

 95% CI

0.663–0.869

0.579–0.804

0.705–0.898

0.549–0.779

0.696–0.892

0.641–0.853

0.736–0.919

 p value

 < 0.0001

0.002

 < 0.0001

0.0093

 < 0.0001

 < 0.0001

 < 0.0001

 ACC (%)

75.71

70.00

82.86

62.86

74.29

77.14

81.43

 SEN(%)

78.57

80.95

95.24

57.14

69.05

83.33

80.95

 SPE(%)

71.43

53.57

64.29

71.43

82.14

67.86

82.14

 PPV(%)

80.49

72.34

80.00

75.00

85.29

79.55

87.18

 NPV(%)

68.97

65.22

90.00

52.63

63.89

73.08

74.19