MIT BIH Polysomnographic Data multiple apnea labels

[karagarcialois]

Hello, i am currently making a project on sleep apnea classification and ran into this confussion. In the MIT-BIH Polysomnographic database on ecg signals, there are a few data labelling which includes more than one label for the apnea labelling, such as '4 LA LA', '1 CAA CAA L', how do you actually interpret the labels correctly, should i use the first apnea label only, is there any documentation regarding this? Thank you!

[tompollard]

https://physionet.org/content/slpdb/ is one of our earliest datasets and as a result we have limited documentation. I assume you have already looked in the associated paper for these details: https://onlinelibrary.wiley.com/doi/full/10.1046/j.1440-1819.1999.00527.x

Unfortunately we don't have current contact details for the lead author, Dr Y. Ichimaru. @rgmark do you have any thoughts on this?