Clinical data of LHON patients, asymptomatic maternal relatives, and normal controls
| LHON | Relatives | Controls | |
|---|---|---|---|
| Number | 27 | 26 | 23 |
| Sex ratio (M/F) | 25/2 | 7/19 | 16/7 |
| Mean age (years) (SD) | 24.0 (8.6) | 33.8 (15.8) | 35.3 (23.6) |
| Range | 11.5–40 | 9–68 | 5–83 |
| Mean age of onset (years) (SD) | 19.8 (8.8) | – | – |
| Mean duration of visual loss (years) | 5.1 (7.8) | – | – |