2011 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, 2011
Characteristics	Weighted No. of Visits	SE (Weighted No.)	Rate^*	SE^*(Rate)
Total	1,942,429	68,200	62.3	2.19
Child (Aged 0–17 years)^†	736,716	44,124	99.7	5.97
Adult (Aged 18+ years)^§	1,205,562	44,896	50.7	1.89
Sex^¶
Male	878,103	36,622	57.3	2.39
Boys (Age <18 years)	455,100	27,242	120.4	7.21
Men (Age 18+ years)	422,946	22,375	36.6	1.94
Female	1,063,813	33,280	67.2	2.10
Girls (Age <18 years)	281,368	16,963	77.9	4.70
Women (Age 18+ years)	782,376	24,757	64.0	2.03
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	300,409	21,557	149.3	10.71
5–17 years	436,308	23,082	81.1	4.29
18–34 years	429,221	14,324	58.9	1.97
35–64 years	621,665	28,342	50.4	2.30
65+ years	154,676	5,017	37.4	1.21
U.S. Census Region^††
Northeast	468,106	40,867	84.2	7.35
Midwest	432,183	35,553	64.4	5.29
South	728,661	36,758	62.8	3.17
West	313,479	19,132	43.1	2.63
MSA Status^§§
MSA^¶¶	1,665,095	66,555	64.0	2.56
Non-MSA^***	269,735	10,908	53.3	2.15

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, 2011
Characteristics	Weighted No. of Visits	Standard Error of Weighted No. of Visits	Rate^* (SE)
Total	1,780,929	163,166	58.1 (5.3)
Child (aged 0–17 years)^†	690,521	90,563	93.6 (12.3)
Adult (aged 18+ years)^§	1,090,408	108,595	46.9 (4.7)
Sex
Male	730,668	89,037	48.9 (6.0)
Female	1,050,261	101,313	67.0 (6.5)
Race, not considering ethnicity
White	986,027	92,493	41.1 (3.9)
Black	685,980	107,238	174.4 (27.3)
Other	108,922	31,888	40.1 (11.7)
Ethnicity
Hispanic or Latino	404,977	69,131	78.8 (13.5)
Not Hispanic or Latino	1,375,952	129,278	54.0 (5.1)
Age Group
0–4 years	213,173	46,622	105.8 (23.1)
5–17 years	477,348	67,081	89.0 (12.5)
18–34 years	367,570	50,101	52.0 (7.1)
35–64 years	591,694	71,797	48.6 (5.9)
65+ years^¶	—	—	—
U.S. Census Region
Northeast	433,435	68,818	79.1 (12.6)
Midwest	298,117	45,842	45.1 (6.9)
South	705,150	123,736	62.0 (10.9)
West	344,227	66,897	48.0 (9.3)
MSA status
MSA	1,561,215	169,261	60.6 (6.6)
Non-MSA^¶	—	—	—

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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