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. Author manuscript; available in PMC: 2020 May 11.
Published in final edited form as: Neuroradiology. 2019 Jan 25;61(4):431–441. doi: 10.1007/s00234-019-02164-6

Table 9.

Observed power analysis using α = 0.05 and estimated effect size within patient groups for scan type (ssDTI vs rsDTI) and between patient groups (healthy controls, NF_1 patients without tumors, and NF1 patients with tumors) for each scan type

Tract count Tract length Tract volume FA MD AD RD
ssDTI vs rsDTI Observed power 0.917 0.372 0.827 0.999 0.795 0.339 0.940
Partial Eta2 0.232 0.069 0.189 0.571 0.177 0.062 0.255
Healthy control, NF_1 ± tumor Observed power 0.050 0.209 0.074 0.068 0.112 0.141 0.096
Partial Eta2 0.000 0.049 0.009 0.007 0.021 0.030 0.016