Table 1.

Sample demographic information.

Groups (years)	Male (n)	Female (n)	Median age (years)
0~9	9	11	6
10~19	9	11	17
20~29	6	14	25
30~39	9	11	34.5
40~49	8	12	45
50~59	12	8	53
60~69	10	10	64
≥70	12	8	75.5
CMBCs	10	10	0