Table 4 Frequency distribution of the optimal 52-symptom subset

1

X6 Duration of pain seizure

454

27

X23 Tinnitus

195

2

X8 Relieving factor

442

28

X15 Fear of cold

194

3

X2 Chest oppression

436

29

X28 Cough

181

4

X5 Seizure frequency

424

30

Y52 Frequent seizure

181

5

X4 Short breath/dyspnea/suffocation

387

31

X75 Impetuosity and susceptibility to rage

179

6

X7 Inducing (aggravating) factor

380

32

X72 The frequent and increased urination at night

164

7

X10 Hypodynamia

363

33

Y317 Fixed pain

146

8

X1 Palpitation

358

34

X48 Thirst with preference for hot water

144

9

Y31 Pain location

348

35

Y73 Aggravating gloom

142

10

X40 Soreness and weakness of waist and knees

282

36

X29 Cough with sputum

141

11

X3 Chest pain

270

37

X13 Amnesia

135

12

X44 Thirsty and dry pharynx

270

38

X9 Edema

134

13

X22 Dizziness and Blurred vision

269

39

X311 Xuli - the apex of the heart

131

14

Y82 Relieving after administration of drug

260

40

Y731 The condition of difficult in falling asleep

130

15

Y61 Transient

257

41

X62 Constipation

126

16

Y72 Inducing (aggravating) after movement

251

42

X291 Color of sputum

124

17

Y51Occasional seizure

245

43

X16 Cold limbs

123

18

Y81 Relieving after rest

242

44

X292 Character of sputum

120

19

X73 Insomnia

241

45

X49 Poor appetite and less amount of food

118

20

X11 Dysphoria

224

46

X32 Gastric stuffiness

105

21

X79 Menopause

222

47

X45 Absence of thirst and no desire for water drink

105

22

X20 Spontaneous sweating

217

48

Y75 Inducing (aggravating) when cloudy or rainy

103

23

X41 Numbness of hands and feet

206

49

X53 Bitter taste

102

24

Y32 Character of pain

205

50

Y294 Difficulty or easy level of coughing with sputum

101

25

X21 Night sweat

201

51

Y71 Seizure when quiet or without inducing factor at night

101

26

Y62 Persistent seizure

198

52

X27 Sore-throat

100