Table 1.

Number of Cases and Estimates of Emergency Department Visits for Insulin-related Hypoglycemia and Errors, by Patient Characteristics—United States, 2007–2011^a

Patient Characteristics	ED Visits for IHEs			Persons with Diabetes Mellitus Treated with Insulin +/− Oral Diabetes Agents		ED Visits Per 1,000 Persons with Diabetes Mellitus Treated with Insulin +/− Oral Diabetes Agents
	Cases	Annual National Estimate		Annual National Estimate		Annual National Estimate	95% Confidence Interval
	No.	No.	%	No.	%
Age
<18 yearsb	265	2,088	2.1	152,555	2.8	13.7	4.9 – 22.5
18–44 years	1,675	21,189	21.7	871,150	15.9	24.3	15.0 – 33.6
45–64 years	2,817	34,173	35.0	2,492,704	45.5	13.7	9.1 – 18.3
65–79 years	2,190	24,720	25.3	1,515,077	27.7	16.3	10.7 – 21.9
≥80 years	1,153	15,479	15.9	443,497	8.1	34.9	20.5 – 49.3
Sexc
Female	4,080	48,458	49.6	2,740,352	50.1	17.7	11.9 – 23.5
Male	4,019	49,186	50.4	2,734,631	49.9	18.0	11.4 – 24.5
Total	8,100	97,648	~	~	~	~	~

Abbreviations: ED, emergency department; IHEs, insulin-related hypoglycemia and errors.

^aCase counts and estimates from the National Electronic Injury Surveillance System – Cooperative Adverse Drug Event Surveillance (NEISS-CADES) project, CDC. Diabetes prevalence estimates from the National Health Interview Survey (NHIS), CDC.

^bFor persons <18 years of age, diabetes therapy is not reported by NHIS; for this age group, prevalence of diagnosed diabetes was used as a proxy for national estimates of insulin treatment.

^cSex missing for one case.