2016 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, 2016
Characteristics	Weighted No. of Visits	SE (Weighted No.)	Rate^*	SE^*(Rate)
Total	1,704,514	68,052	52.8	2.11
Child (Aged 0–17 years)^†	691,535	45,448	93.9	6.17
Adult (Aged 18+ years)^§	1,012,566	39,835	40.6	1.60
Sex^¶
Male	803,444	34,828	50.5	2.19
Boys (Age <18 years)	423,070	27,953	112.5	7.43
Men (Age 18+ years)	380,112	15,604	31.3	1.28
Female	900,924	34,438	54.9	2.10
Girls (Age <18 years)	268,427	17,609	74.5	4.89
Women (Age 18+ years)	632,347	24,657	49.4	1.93
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	245,866	19,204	123.4	9.64
5–17 years	445,669	26,970	83.0	5.02
18–34 years	419,519	15,730	55.5	2.08
35–64 years	501,067	21,211	40.2	1.70
65+ years	91,979	3,865	18.7	0.78
U.S. Census Region^††
Northeast	403,603	38,407	71.8	6.83
Midwest	326,006	25,691	48.0	3.78
South	668,381	46,051	54.6	3.76
West	306,525	19,372	40.0	2.53
MSA Status^§§
MSA^¶¶	1,496,960	66,390	54.2	2.40
Non-MSA^***	200,471	9,096	43.4	1.97

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, 2016
Characteristics	Weighted No. of Visits	Standard Error of Weighted No. of Visits	Rate^* (SE)
Total	1,776,851	204,136	55.9 (6.4)
Child (aged 0–17 years)^†	546,013	98,935	74.3 (13.5)
Adult (aged 18+ years)^§	1,230,838	162,841	50.3 (6.7)
Sex
Male	701,071	98,657	45.1 (6.3)
Female	1,075,780	149,922	66.2 (9.2)
Race, not considering ethnicity
White	1,051,527	166,935	42.9 (6.8)
Black	670,940	94,570	161.1 (22.7)
Other^¶	54,384	19,670	—
Ethnicity
Hispanic or Latino	452,265	100,494	79.6 (17.7)
Not Hispanic or Latino	1,324,586	154,961	50.7 (5.9)
Age Group
0–4 years	175,200	44,039	87.9 (22.1)
5–17 years	370,813	74,511	69.2 (13.9)
18–34 years	594,213	108,041	80.9 (14.7)
35–64 years	505,449	84,062	41.0 (6.8)
65+ years^¶	126,480	50,342	—
U.S. Census Region
Northeast	353,039	77,788	63.6 (14.0)
Midwest	334,786	74,236	50.0 (11.1)
South	648,023	128,009	54.0 (10.7)
West	441,004	117,146	58.4 (15.5)
MSA status
MSA	1,481,170	188,938	54.1 (6.9)
Non-MSA^¶	295,682	122,585	—

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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