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Table 1 Selected features and GA parameters value using D1 and D2

From: Classification of vasovagal syncope from physiological signals on tilt table testing

No.

CP

MP

CIP

MIP

Tournament

size

Scores

Features

Value of selected features of GA by D1

 1

0.5

0.1

0.4

0.05

1

93.2

'CV_HR_S', 'SD_SBP_S', 'RMSRV_SBP_S', 'CV_DBP_S', 'CV_HR_T', 'Lfnu_SBP_T', 'SD_DBP_T', 'CV_DBP_T'

 2

0.5

0.2

0.4

0.05

1

92.79

Hfnu_RRI_S', 'Hfnu_SBP_S’, ‘SBP_T', 'CV_SBP_T', 'CV_DBP_T'

 3

0.5

0.2

0.5

0.05

1

93.39

Age', 'ARV_SBP_S', 'SDRV_SBP_S', 'Hfnu_SBP_S', 'Lfnu_SBP_S', 'CV_DBP_S', 'CV_SBP_T', 'Lfnu_DBP_T'

 4

0.5

0.2

0.5

0.04

1

93.1

'Hfnu_RRI_S', 'CV_SBP_S', 'LFHF_RRI_T', 'CV_SBP_T', 'SDRV_SBP_T', 'Lfnu_SBP_T', 'CV_DBP_T'

 5

0.5

0.2

0.5

0.04

3

95.0

'SD_SBP_S', 'DBP_S', 'CV_DBP_S', 'RMSRV_DBP_S', 'SD_HR_T', 'SBP_T', 'CV_SBP_T', 'Lfnu_SBP_T', 'SD_DBP_T', 'CV_DBP_T'

Value of selected features of GA by D2

 1

0.5

0.1

0.4

0.05

1

94.3

'DBP_S', 'Hfnu_DBP_S', 'SBP_T',

'CV_SBP_T', 'SDRV_SBP_T', 'Lfnu_SBP_T', 'LFHF_SBP_T', 'CV_DBP_T', 'Lfnu_DBP_T'

 2

0.5

0.2

0.4

0.05

1

93.3

'Age', 'Hfnu_SBP_S', 'Lfnu_DBP_S', 'CV_HR_T', 'SDRV_HR_T', 'CV_SBP_T', 'SDRV_SBP_T', 'SD_DBP_T', 'Lfnu_DBP_T'

 3

0.5

0.2

0.5

0.05

1

93.2

'Hfnu_RRI_S', 'SD_SBP_S', 'DBP_Supine', 'SDRV_DBP_S', 'SD_HR_T', 'SDRV_HR_T', 'SBP_T', 'ARV_SBP_T', 'CV_DBP_T', 'Lfnu_DBP_T'

 4

0.5

0.2

0.5

0.04

1

93.1

'SD_SBP_S', 'SDRV_SBP_S', 'CV_SBP_T', 'ARV_SBP_T', 'Lfnu_SBP_T', 'SD_DBP_T', 'CV_DBP_T', 'Hfnu_DBP_T'

 5

0.5

0.2

0.5

0.04

3

95.8

'Age', 'DBP_S', 'CV_DBP_S', 'LFHF_RRI_T', 'SBP_T', 'CV_SBP_T', 'Lfnu_SBP_T', 'SD_DBP_T', 'CV_DBP_T'

  1. Bold values indicate the best performance of the model
  2. D1, K-nearest neighbors (KNN) imputation data; D2, mean imputation data; S, supine; T, 70 degree tilting; CP, crossover probability; MP, mutation probability; CIP, crossover independent probability; MIP, mutation independent probability = MIP; HR, heart rate; HRV, HR variability; SBP, systolic BP; DBP, diastolic BP; SBPV, SBP variability, DBPV, DBP variability; CV, coefficient of variance; ARV, average real variability; RMSRV, root mean square of real variability; SDRV, standard deviation of real variability; HFnu, normalized high-frequency power; LFnu, normalized low-frequency power; LFHF, normalized ratio of HF to LF