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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Comput Assist Tomogr. 2015 May-Jun;39(3):334–339. doi: 10.1097/RCT.0000000000000227

Table 3.

The repeatability analysis of ADC measurement with rFOV and fFOV DWI in thyroid glands

Measurements rFOV DWI fFOV DWI p value
ADC value (×10−3 mm2/s) (for all sessions) (mean±std) 1.37±0.31 1.80±0.29 p<0.001*
Across sessions
ADC value (×10−3 mm2/s) (mean±std) 1.39±0.27 vs 1.34±0.34 (p>0.05) 1.84±0.18 vs 1.76±0.38 (p>0.05)
Within-subject variance (σw2) (×10−3 mm2/s)2 0.0046 0.0921
Repeatability coefficients (RC) (×10−3 mm2/s) 0.1877 0.8412
Intraclass correlation coefficient (ICC) 0.9755 0.5148
Within-subject coefficient of variation (wCV,%) 4.86 17.30
Across exams
ADC value (×10−3 mm2/s) (mean±std) 1.36±0.27 vs 1.37±0.35 vs 1.27±0.22 (p>0.05) 1.84±0.33 vs 1.74±0.27 vs 1.74±0.23 (p>0.05)
Within-subject variance (σw2) 0.0147 0.0351
Repeatability coefficients (RC) 0.3355 0.5192
Intraclass correlation coefficient (ICC) 0.9273 0.5175
Within-subject coefficient of variation (wCV,%) 9.88 10.33
*

denotes p value <0.05