Table 1 Cohort characteristics at recruitment
| Characteristic | N | ||
|---|---|---|---|
| Male (%) | 794 | 543 (68.4) | |
| Born in Edinburgh (%) | 794 | 530 (66.7) | |
| Mean age (SD, min-max) at first injection | 606* | 19.9 (5.1, 11-41) | |
| Mean age (SD, min-max) at recruitment | 606 | 26.7 (6.3, 16-52) | |
| Mean years (SD, min-max) first injection to recruitment | 606 | 6.9 (5.7, 0-28) | |
| Recruited within 5 years of injection onset (%) | 606 | 306 (50.5) |
