Table 1.

The age and sex distribution of patients.

	Different AFD groups			Control group	Total
	Itra group	Fluc group	Vori group
Total number of cases	44	42	6	44	136
Median age * (range)	63 m (21 m–14 y)	59 m (19 m–10 y)	61 m (17 m–11 y)	63 m (16 m–13 y)	62 m (16 m–14 y)
1–3 years	14	14	2	14	42 (30.1%)
4–7 years	21	24	4	23	68 (50.0%)
7–14 years	9	4	0	7	26 (19.1%)
Male/female**	26/18	26/16	4/2	26/18	78/58

^*Indicates P>0.05 in t-tests;

^**indicates P>0.05 in chi-square tests using SPSS18.0 software.