First of all I would like to thank you for helping me with this question.

For my research I investigated 23 patients. I looked at there range of motion of the shoulder and investigated the angle at which a dislocation/relocation occurred during forward flexion (FF) and abduction (ABD). These are my results:

Dislocation FF (°): Mean = 141° (SD=30.0)

Dislocation ABD (°): Mean = 101° (SD=18.9)

P value (Pared student T Test): P < 0.001

Relocation FF (°): Mean= 96° (SD =42.3)

Relocation ABD (°): Mean = 75° (SD = 23.2)

P value (Pared Student T Test): P = 0.124

A statistically significant difference (p<0.001) was found between the angle of dislocation during FF compared to abduction. Mean angle of dislocation during FF was 36 degrees higher compared to abduction, 95% CI = [19;53].

However, the reviewer commented the following: the power for the comparison of differences for flexion and abduction is 0.4 (according to the values presented in the table). Please mention as the data is rather not sufficient to support a statement, that there is no difference.

Can someone explain me how he got this 0.4. And how I can correctly describe this in my research?

Thanks in advance!