2012 Healthcare Use Data

Emergency Department Visits

**Table A:** Number and rate of emergency department (ED) visits with asthma as the first-listed diagnosis per 10,000 population, by selected patient characteristics: United States, 2012
Characteristics	Weighted No. of Visits	SE (Weighted No.)	Rate^*	SE^*(Rate)
Total	2,044,593	77,016	65.1	2.45
Child (Aged 0–17 years)^†	775,426	43,689	105.2	5.93
Adult (Aged 18+ years)^§	1,268,971	50,060	52.8	2.08
Sex^¶
Male	951,638	39,765	61.6	2.57
Boys (Age <18 years)	480,078	26,965	127.4	7.16
Men (Age 18+ years)	471,464	23,688	40.4	2.03
Female	1,092,850	38,917	68.6	2.44
Girls (Age <18 years)	295,338	16,826	82.0	4.67
Women (Age 18+ years)	797,441	28,693	64.6	2.33
Race, not considering ethnicity
White	—^**	—^**	—^**	—^**
Children (Age <18 years)	—^**	—^**	—^**	—^**
Adults (Age 18+ years)	—^**	—^**	—^**	—^**
Black	—^**	—^**	—^**	—^**
Children (Age <18 years)	—^**	—^**	—^**	—^**
Adults (Age 18+ years)	—^**	—^**	—^**	—^**
Other^**	—^**	—^**	—^**	—^**
Children (Age <18 years)	—^**	—^**	—^**	—^**
Adults (Age 18+ years)	—^**	—^**	—^**	—^**
Ethnicity
Hispanic	—^**	—^**	—^**	—^**
Children (Age <18 years)	—^**	—^**	—^**	—^**
Adults (Age 18+ years)	—^**	—^**	—^**	—^**
Non-Hispanic	—^**	—^**	—^**	—^**
Children (Age <18 years)	—^**	—^**	—^**	—^**
Adults (Age 18+ years)	—^**	—^**	—^**	—^**
Age Group
0–4 years	298,460	19,625	149.3	9.82
5–17 years	476,966	24,745	88.8	4.61
18–34 years	462,101	17,158	62.7	2.33
35–64 years	651,793	30,170	52.8	2.45
65+ years	155,077	5,619	35.9	1.30
U.S. Census Region^††
Northeast	467,358	43,244	83.8	7.75
Midwest	459,325	34,554	68.2	5.13
South	763,147	47,920	65.1	4.09
West	354,764	23,900	48.2	3.25
MSA Status^§§
MSA^¶¶	1,764,674	75,319	67.4	2.88
Non-MSA^***	271,854	9,924	52.8	1.93

Abbreviations: MSA, Metropolitan Statistical Area; SE, standard error.
^*Crude rate per 10,000 and SE, standard error.
^†Rate of child ED visits was calculated using the weighted number of visits for children aged 0–17 years and dividing it by the resident population for children aged 0–17 years per 10,000.
^§Rate of adult ED visits calculated using the weighted number of visits for adults aged 18+ years divided by the resident population for adults aged 18+ years per 10,000.
^¶Sex of patient categories include male and female as in the medical record.
^**Data on race and ethnicity was not available in the database.
^††Based on actual location of the hospital.
^§§Based on location of patient’s residence.
^¶¶Rate of MSA ED visits was calculated by combining the weighted number of visits for large central metro, large fringe metro (suburbs), and medium and small metro categories and dividing it by the resident population for MSA per 10,000.
^***Rate of Non-MSA ED visits was calculated using the weighted number of visits for the micropolitan and noncore (rural) category and dividing it by the resident population for non-MSA per 10,000.

SOURCE: HCUP, Healthcare Cost and Utilization Project, National (Nationwide) Emergency Department Sample (NEDS). Agency for Healthcare Research and Quality, Rockville, MD. For more information about HCUP data see https://www.hcup-us.ahrq.gov/db/nation/neds/nedsdbdocumentation.jsp.

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**Table A:** Emergency department visits (ED) with asthma as the primary diagnosis per 10,000 population, by selected patient characteristics: United States, 2012
Characteristics	Weighted No. of Visits	Standard Error of Weighted No. of Visits	Rate^* (SE)
Total	1,694,825	180,645	54.9 (5.9)
Child (aged 0–17 years)^†	825,045	151,788	112.1 (20.6)
Adult (aged 18+ years)^§	869,780	100,183	37.0 (4.3)
Sex
Male	692,041	105,962	45.9 (7.0)
Female	1,002,784	107,303	63.5 (6.8)
Race, not considering ethnicity
White	917,557	138,429	38.1 (5.7)
Black	750,682	101,541	188.6 (25.5)
Other^¶	—	—	—
Ethnicity
Hispanic or Latino	521,580	135,510	99.6 (25.9)
Not Hispanic or Latino	1,173,245	116,421	45.8 (4.5)
Age Group
0–4 years^¶	—	—	—
5–17 years	506,417	79,820	94.5 (14.9)
18–34 years	316,711	53,243	44.3 (7.4)
35–64 years	465,072	67,121	38.2 (5.5)
65+ years^¶	—	—	—
U.S. Census Region
Northeast	446,372	91,194	81.2 (16.6)
Midwest	386,175	60,287	58.2 (9.1)
South	619,391	135,370	53.9 (11.8)
West	242,887	48,546	33.5 (6.7)

Abbreviations: MSA, Metropolitan Statistical Area; SE, standard error.

^*Crude rate per 10,000 population and SE, standard error.

^†Rate of child emergency department visits was calculated using the weighted number of visits for children aged 0-17 years and dividing it by the civilian non-institutionalized population for children aged 0-17 years per 10,000.

^§Rate of adult emergency department visits was calculated using the weighted number of visits for adults aged 18+ years divided by the civilian non-institutionalized population for adults aged 18+ years per 10,000.

^¶Estimate is suppressed because relative standard error (RSE) of the estimate is >30%. ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Datasets/NHAMCS

Source: CDC/NCHS. National Hospital Ambulatory Medical Care Survey (NHAMCS). https://www.cdc.gov/nchs/ahcd/about_ahcd.htm

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