Table 6– Air pollution related exacerbations and costs of all asthmatics

	Riverside		Long Beach		Total cost per year US$
	Count	Cost per outcome US$	Count	Cost per outcome US$	Total cost per year US$
NO₂-attributable
Emergency room visits	42	956	160	944	191192
In-patient hospitalisations	8	13282	30	13227	503066
Office visits	200	158	500	153	108100
Bronchitic episodes	1600	975	3400	918	4681200
O₃-attributable
Emergency room visits	250	956			239000
In-patient hospitalisations	12	13282			159384
Office visits	220	158			34760
Bronchitic episodes	3100	975			3022500
School days absent	2966	230	626	205	810510
Total annual cost US$					9749712

All costs are rounded to the nearest US$ 2010 rate. NO₂: nitorigen dioxide; O₃: ozone.