minsooyeo

I am planing to write paper about detecting sleep apnea with large volume data and i have submitted my data use proposal

I ask you several point about my wondering

If the model trained with several none-commercial purpose data set shows good performance our commercial-used device data, can i conclude that "this result represent that our proposed method decrease development cost." if it is not possible, should i conclude that "this result represent that our proposed method decrease development cost if these datasets are non-commercial use datasets"?

thank you.

thank for your reply !

In my research which estimates obstruct sleep apnea severity with ECG, i found that it is possible to estimate obstruct sleep apnea severity correctly from other commercial device ECG using a model feeded with CFS and MESA ECG.

So i think that it can decrease commercial device development cost and i has one question that there are any problem if these data are commercially used.

If you could take a few minutes to answer this questions, i would really appreciate it.

thank you.

I have confirmed that there is no problem with 2852 subject of mesa data ("slpprdp5" variable --> 393, the TST from new xml files sleep stage --> 393)

thank you

Thanks for your kindly reply

I has totaly understanded your answers and written down two data requirement forms (cfs, mesa) you asked me

I will re-download data and review one more time

Sincerely,

Thanks for your kindly reply,

I send you information you requested

[1]. about "variable TST"

CFS: "SLPPRDP" variable

MESA: "slpprdp5" variable

[2]. account issue

Yes i has obtained access to data on a different account, one of the our team member got access for data. If you need to a information about the account, i will inform you that

Sincerely,

HI, i am on sleep study with CFS & MESA data

on the study i has found critical issue can affect other future works

this issue should be identified promptly.

you know, total sleep time (TST) is can be calculated from sleep stage like equation 1 and the sleep stage can be extracted from annotation xml file

equation1) TST = in bed time - (wake after sleep onset + sleep latency)

Common sense, a TST from the sleep stage and TST from variable csv file are must be same, however several subject are difference

To check the exact value of errors, i ploted figures can express the two values.

i has attached the plots and writed down details, i hope you to deal with this issue promptly

plot figures link https://drive.google.com/open?id=1XQcjGReenZwWpAcf-xMacDm-QSRZDGtv

MESA (1899 subjects), unit: min

(subject number, from variable TST, from sleep stage TST)

(1738, 226, 256)

(2852 , 393, 502.5)

(6476 , 403, 411)

CFS (694 subjects), unit: min

(subject number, from variable TST, from sleep stage TST)

(800937, 19, 28)

(800170, 248, 265)

(801121, 269, 276.5)

(802726, 276, 283.5)

(802368, 326, 340)

(802678, 335, 362.5)

(802001, 359, 363.5)

(801376, 380, 383.5)

(800402, 379, 432.5)

many thanks,