Table 1.

Distribution of daily ER admissions, for the diagnoses of the respiratory diseases considered in the analysis, during the study period (883 days)

Respiratory disease diagnoses			total n. of admissions	daily n. of admissions
Group	Description	ICD-IX-CM code	count	mean ± SD	median	min-max
Upper respiratory tract infections	Acute rhino pharyngitis	460	17684	18.1 ± 9.0	17	0-45
	Acute pharyngitis	462
	Acute tonsillitis	463
	Acute laryngitis without obstruction	46400
	Acute laryngitis with obstruction	46401
	Acute upper respiratory infections	4658
Lower respiratory tract infections	Acute bronchitis	4660	1989	3.0 ± 3.2	2	0-20
	Acute bronchiolitis other infectious agents	46619
	Flu with respiratory manifestations	4871
	Bronchitis	490
Deep lung infections	Viral pneumonia	4809	839	2.1 ± 2.1	2	0-8
	Bacterial pneumonia	4829
	Bronchopneumonia	485
	Pneumonia	486
Asthma	Asthma, without status asthmatics	49390	1281	1.5 ± 1.6	1	0-7
	Asthma, with status asthmatics	49391
Total			21793	24.7 ± 11.7	23	0-80

International classification of diseases, 9th edition, clinical modification (ICD-IX-CM) codes