# SPHARM-PDM surface point parameter extraction

**URL:** <https://discourse.slicer.org/t/spharm-pdm-surface-point-parameter-extraction/18472>\
**Category:** SlicerSALT\
**Created:** [July 2, 2021, 3:18am UTC](https://discourse.slicer.org/t/spharm-pdm-surface-point-parameter-extraction/18472 "2021-07-02T03:18:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ian\_Harding](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ian_harding/32/11463_2.png) [@Ian\_Harding](https://discourse.slicer.org/u/Ian_Harding)\
**Post date:** [July 2, 2021, 3:18am UTC](https://discourse.slicer.org/t/spharm-pdm-surface-point-parameter-extraction/18472/1 "2021-07-02T03:18:56Z")

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After running group-level statistical models on the SPHARM surfaces, and generating 3D illustrations of areas that are significantly related to our independent variable of interest, I am curious whether it is possible to go back and extract the individual-level parameters within these regions of significance to allow for plotting or other post-hoc assessments?

For example, in our case we have identified shape changes that are significantly correlated with a metric of disease severity in our sample. Our colleagues - and I would imagine likely future reviewers - have asked to see a scatterplot of the data within these regions to aid with interpretation of the effect.

Thanks in advance!

Best,  
Ian