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Missing data #1

Open devhci opened 1 year ago

devhci commented 1 year ago

Dear @brinnaebent,

I came across your paper 'Investigating sources of inaccuracy in wearable optical heart rate sensors'. It was mentioned that https://physionet.org/content/bigideaslab-step-hr-smartwatch/1.0/ data was used in this analysis.

Upon download and viewing the datasets https://physionet.org/content/bigideaslab-step-hr-smartwatch/1.0/. it appears that the majority of the sensors have <50% data compliance i.e., the columns have NaN values. Apple Watch has Max missing data. I wanted to inquire:

  1. Is the data used in the paper ''Investigating sources of inaccuracy in wearable optical heart rate sensors' the same as https://physionet.org/content/bigideaslab-step-hr-smartwatch/1.0/ or is this a limited version of the full dataset used in the paper?

  2. Difference/Inaccuracy in the HR from the ground truth ECG is one thing but missing almost 50% of that data is something that puzzles me. If so, is not the nearly 50% missing data a bigger problem than differences in HR from the round-truth ECG?

Regards Devender

Screenshot 2023-01-02 143850

brinnaebent commented 1 year ago

Devender,

Can you send an email with this information to my email @.***?

Thanks,

Brinnae

On Jan 2, 2023, at 9:17 AM, Devender kumar @.***> wrote:

 Dear @brinnaebent,

I came across your paper 'Investigating sources of inaccuracy in wearable optical heart rate sensors'. It was mentioned that https://physionet.org/content/bigideaslab-step-hr-smartwatch/1.0/ data was used in this analysis.

Upon download and viewing the datasets https://physionet.org/content/bigideaslab-step-hr-smartwatch/1.0/. it appears that the majority of the sensors have <50% data compliance i.e., the columns have NaN values. Apple Watch has Max missing data. I wanted to inquire:

Is the data used in the paper ''Investigating sources of inaccuracy in wearable optical heart rate sensors' the same as https://physionet.org/content/bigideaslab-step-hr-smartwatch/1.0/ or is this a limited version of the full dataset used in the paper?

Difference/Inaccuracy in the HR from the ground truth ECG is one thing but missing almost 50% of that data is something that puzzles me. If so, is not the nearly 50% missing data a bigger problem than differences in HR from the round-truth ECG?

Regards Devender

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