Anyone use data from the ActiGRaph LEAP?

[Reagan Moffit]

Hello, 

I am just curious whether anyone has tested raw data collected from the ActiGraph LEAP device in GGIR. Any issues or considerations? 

ActiGraph no longer uses gt3x file formats for the LEAP, so data will need to be analyzed using csv files. 

Thank you! 

Reagan

[Reagan Moffit]

Just wanted to update everyone after my group started testing ActiGraphLEAP device files. 

If using ActiLIFE, you can no longer get a raw GT3X file when using the LEAP device, only a csv. If using CentrePoint, you can get both a GT3X and csv file. Note that our testing showed that the new csv format from CentrePoint is not automatically recognized as an ActiGraph file by GGIR - there are now timestamps and the headers are oriented differently. 

We were able to process our test GT3X files from the LEAP BUT during our first run, we did receive an error/warning message - read.gt3x doesn't love the capitalized GT3X extension. However, simply re-running the code overrode that error and we were able to get valid output. 

I hope this is helpful as more studies begin using the LEAP device. I know NHANES is moving to the LEAP device during their next accelerometry collection period. 

Reagan

[Vincent van Hees]

Note that GGIR automatically renames file names with capital .GT3X to .gt3x such that read.gt3x can handle them.

If this is incorrect then I look forward to a proposal to better handle these files.

Thanks,

Vincent

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[oran...@hotmail.co.uk]

Hi Reagan,

I am working with Actigraph Leaps and I'm looking to process the raw .csv and .gt3x files downloaded from CentrePoint in GGIR. I typically work with Axivity .cwa files. 

I am aware of some of the issues around GGIR not automatically recognising Actigraph Leap .csv files downloaded from CentrePoint. So far I haven't been able to process the files following trial and error.

I can see you and your team have been working on this - I wondered if you would be so kind as to share your GGIR code for processing Actigraph Leap .csv and .gt3x files? It would be greatly appreciated! My email is sam.o...@newcastle.ac.uk.

Best wishes,

Sam

(Senior Lecturer, Exercise Physiologist, Newcastle University)