Cohort information and follow-up
| Available information | Male | Female | ||
|---|---|---|---|---|
| Number | Per cent | Number | Per cent | |
| Surname | 3361 | 100.0 | 33 | 100.0 |
| An additional surname | 2 | 0.1 | 2 | 0.1 |
| Forename initials only | 7 | 2.3 | 0 | 0.0 |
| An alias available | 25 | 0.7 | 2 | 6.1 |
| Date of birth not available | 52 | 1.6 | 0 | 0.0 |
| Alternative date of birth | 5 | 0.1 | 0 | 0.0 |
| No address | 1205 | 35.9 | 12 | 36.4 |
| Overseas address | 336 | 10.0 | 3 | 9.1 |
| Died in Vietnam service | 36 | 1.1 | 1 | 3.0 |
| Died after Vietnam war and before 1988 | 3 | 0.1 | 0 | 0.0 |
| Male survivors of Vietnam service | 3322 | 98.8 | ||
| Men matched by Ministry of Health | 2531 | |||
| Men matched with electoral roll | 252 | |||
| Men followed up | 2783 | 83.8 | ||
| Not matched | 539 | 16.2 | ||
| Unconfirmed date of death | 34 | 6.3 | ||