Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Automatic scoring of apnea and hypopnea events using blood oxygen
  saturation signals   The obstructive sleep apnea-hypopnea (OSAH) syndrome is a very common and
frequently undiagnosed sleep disorder. It is characterized by repeated events
of partial (hypopnea) or total (apnea) obstruction of the upper airway while
sleeping. This study makes use of a previously developed method called DAS-KSVD
for multiclass structured dictionary learning to automatically detect
individual events of apnea and hypopnea using only blood oxygen saturation
signals. The method uses a combined discriminant measure which is capable of
efficiently quantifying the degree of discriminability of each one of the atoms
in a dictionary. DAS-KSVD was applied to detect and classify apnea and hypopnea
events from signals obtained from the Sleep Heart Health Study database. For
moderate to severe OSAH screening, a receiver operating characteristic curve
analysis of the results shows an area under the curve of 0.957 and diagnostic
sensitivity and specificity of 87.56% and 88.32%, respectively. These results
represent improvements as compared to most state-of-the-art procedures. Hence,
the method could be used for screening OSAH syndrome more reliably and
conveniently, using only a pulse oximeter.

27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph