Table 4.

Variables provided by the expert annotators.

Name	Range of possible values	Description
quality	{good, ok, poor, no_cough}	Quality of the recorded cough sound.
cough_type	{wet, dry, unknown}	Type of cough.
dyspnea	{True, False}	Audible dyspnea.
wheezing	{True, False}	Audible wheezing.
stridor	{True, False}	Audible stridor.
choking	{True, False}	Audible choking.
congestion	{True, False}	Audible nasal congestion.
nothing	{True, False}	Nothing specific is audible.
diagnosis	{upper_infection, lower_infection, obstructive_disease, COVID-19, healthy_cough}	Impression of the expert about the condition of the patient. It can be an upper or lower respiratory tract infection, an obstructive disease (Asthma, COPD, etc), COVID-19, or a healthy cough.
severity	{pseudocough, mild, severe, unknown}	Impression of the expert about the severity of the cough. It can be a pseudocough from a healthy patient, a mild or severe cough from a sick patient, or unknown if the expert can’t tell.