Table 1. The demographic character of the study participants.
| Parameter | Volunteer group (no. [%]) | P | |
| Chinese IDUs | Burmese IDUs | ||
| Subjects | N = 403 | N = 318 | |
| Age (Mean±SD) | 32.3±8.8a | 31.8±9.8b | NS |
| Age of first druginjection (Mean±SD) | 26.0±8.3c | 27.4±8.6d | NS |
| Years of druginjection (Mean±SD) | 6.2±4.8e | 4.2±4.6f | <0.001 |
| Gender | <0.05 | ||
| Male | 399 (99.0) | 279 (96.5) | |
| Female | 4 (1.0) | 10 (3.5) | |
| Totalg | 403 | 289 | |
| Ethnicity | <0.001 | ||
| Han | 166 (41.5) | 82 (29.1) | |
| Dai | 168 (42.0) | 44 (15.6) | |
| Jingpo | 53 (13.3) | 138 (48.9) | |
| Other | 13 (3.2) | 18 (6.4) | |
| Totalh | 400 | 282 | |
IDUs, intravenous drug users; NS, not significant.
a
data available for 400 subjects.
b
data available for 289 subjects.
c
data available for 391 subjects.
d
data available for 240 subjects.
e
data available for 385 subjects.
f
data available for 242 subjects.
g
Total number of subjects with known gender.
h
Total number of subjects with known ethnicity.