| Variables | Frequency | Percentage (%) |
| Gender |
|
|
| Male | 211 | 60.1 |
| Female | 140 | 39.9 |
| Age group |
|
|
| 20 - 29 | 282 | 80.3 |
| 30 - 39 | 43 | 12.3 |
| ≥40 | 26 | 7.4 |
| Ethnicity |
|
|
| Yoruba | 158 | 45.0 |
| Igbo | 118 | 33.6 |
| Hausa | 49 | 14.0 |
| Others* | 26 | 7.4 |
| Occupation |
|
|
| Camp official | 56 | 16.0 |
| NYSC members | 295 | 84.0 |
| Period of test |
|
|
| January | 207 | 59.0 |
| March | 144 | 41.0 |