| Normal controls | Recurrent pteryia | ||
Grade 1 | Grade 2 | Grade 3 | ||
Number | 7 | 14 | 20 | 14 |
Age (years) | 60.8 ± 11.8 | 58.8 ± 16.6 | 60.5 ± 17.8 | 52.9 ± 21.5 |
Female/male | 4/3 | 7/7 | 12/8 | 9/5 |
RT (months) |
| 25.14 ± 4.49 | 19.92 ± 1.44 | 15.35 ± 1.52 |