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. 2015 Jul 31;8:437–447. doi: 10.2147/JPR.S86244

Table 2.

Pre- to posttreatment histogram measurement change statistical analysis

Variable Mean SD Median Lower quartile Upper quartile Minimum Maximum P-value
Image mean −12.911 14.699 −9.390 −18.962 −4.161 −46.373 1.459 0.0098
Image mode −13.733 20.425 −9.167 −24.667 −4.333 −45.333 17.000 0.084
Image median −12.367 14.358 −9.833 −18.333 0 −42.333 3.000 0.0195
Skewness 0.243 0.529 −0.024 −0.093 0.422 −0.292 1.204 0.625
Raw Integrated Density −100783 77363 −71590 −163967 −48921 −244398 −3112 0.002

Note: P-values were calculated using the signed-rank test.