Table 1 TPD thresholds for male and female as well as younger and older participants (intra-rater reliability sample)
From: Upper cervical two-point discrimination thresholds in migraine patients and headache-free controls
Between group differences | Male (n = 25) | Female (n = 26) | t - test |
 Left neck (mean ± SD) | 2.75 (0.71) cm | 2.6 (0.72) cm | p = 0.458 |
 Right neck (mean ± SD) | 2.9 (0.73) cm | 2.5 (0.53) cm | p = 0.031 |
Between group differences | Age 36 ≥ (n = 26) | Age > 35 (n = 25) | t - test |
 Left neck (mean ± SD) | 2.42 (0.64) cm | 2.93 (0.7) cm | p = 0.008 |
 Right neck (mean ± SD) | 2.40 (0.54) cm | 3.0 (0.65) cm | p = 0.001 |