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body position in SHHS

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minkas +0 points · 7 months ago

Hi,

in the SHHS dataset, there is body position data of subjects, which is a signal with the frequency of 1 Hz, and values of 0, 1, 2, and 3. In fact, each number shows a specific position of subject in a second. In addition, these numbers refer to four positions including Back, Front, Left side, and Right side.

Now, I would like to know, which one of these four positions dose each number refer to? I mean, for example, which position dose "the number of 0 in position data" refer to? the value of 0 might refer to back position, front position, left side, or right side, which one 0 refers to?

Thank you in advance for any help

regards

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mrueschman +0 points · 7 months ago

Thanks for using the site. The position values may differ between SHHS subjects, so you should reference the individual Profusion XML files.

If you open a Profusion XML file, you'll find the Position Input definitions near the top, e.g.

The labels here correspond to the order of the position signal values, so

0 - Right

1 - Left

2 - Back

3 - Front

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minkas +0 points · 7 months ago

Thank you so much for you response.

I checked the Profusion XML files of several subjects of shhs1 randomly, about 30 to 40 files, and all of them have such a order of the position signal that you mentioned, Right, Left, Back, and Front!

Can I conclude that every subject has this order of the position and the position values are constant for all shhs1 subjects?

I mean for all subjects we have:

0 - Right

1 - Left

2 - Back

3 - Front

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mrueschman +0 points · 6 months ago

I have not checked every SHHS file myself to know whether your conclsuion is sound. I still think it would be advisable to run some systematic check across all the XML files to make sure the position codes are in the same order.

Thanks for your thoughtful question!

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minkas +0 points · 6 months ago

I will try it due to your advice. Thanks a lot