Group

n

Gender (n)

Age

( $\overline{x}\pm s$ , Years)

Number of Ulcers ( $\overline{x}\pm s$ , Persons)

Interval of Ulcers

( $\overline{x}\pm s$ , Days)

Male

Female

Positive Control Group(Thalidomide)

24

12

12

40.75 ± 10.96

16.50 ± 5.08

82.50 ± 50.23

Trial Group (Zhibai Dihuang Pills)

28

10

18

38.86 ± 16.22

15.00 ± 6.43

88.29 ± 40.95

Negative Control Group (Local Medication)

20

8

12

40.64 ± 14.91

17.60 ± 10.58

77.00 ± 46.01

χ²/F

-

1.117

2.169

0.735

0.392

P

-

0.599

0.122

0.483

0.677