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Table 4 Association of the herbs from 96 formulae with Channel tropism (N = 180 in 96 formulae)

From: Using association rules mining to explore pattern of Chinese medicinal formulae (prescription) in treating and preventing breast cancer recurrence and metastasis

Channel Tropism

Number of herbs

Occurrence frequency (%)

Number of formulae

Frequency of use (%)

Liver (Gall bladder)

120(13)

27.09

43(9)

44.79

Spleen (Stomach )

126(59)

28.44

42(35)

43.75

Lung (Large intestine)

77(14)

17.38

36(13)

37.50

Kidney (Urinary bladder)

64(12)

14.45

28(9)

29.17

Heart (Small intestine)

51(4)

11.51

26(4)

27.08

Triple energizers (Pericardium)

3(2)

1.13

3(2)

3.13

  1. Occurrence frequency = number of herbs belonging to each category / total number of recorded herbs (i.e.: 180); Frequency of use = number of formulae recording the use of the herbs / total number of selected formulae (i.e.: 96).