Table 3.

Counts of acute heat illness diagnoses (ICD9 codes 992.0–992.9) by emergency department (ED) disposition with row and column percents.

ICD-9-CM heat illness diagnosis	Treat and release			Admit to hospital			Death in ED
	n	Row %a	Column%b	n	Row %	Column %	n	Row %	Column %
992.0–Heat stroke	6,889	38	2	11,059	61	28	178	1	77
992.1–Heat syncope	12,812	86	4	2,089	14	5	—c	≤ 2	≤ 4
992.2–Heat cramps	17,592	98	6	373	2	1	—c	≤ 2	≤ 4
992.3–Heat exhaustion (anhydrotic)	10,841	79	4	2,899	21	7	—c	≤ 2	≤ 4
992.4–Heat exhaustion (salt depletion)	1,252	67	0	623	33	2	—c	≤ 2	≤ 4
992.5–Heat exhaustion (unspecified)	213,659	91	73	19,894	9	51	—c	≤ 2	≤ 4
992.6–Heat fatigue	2,600	95	1	130	5	0	—c	0	≤ 4
992.7–Heat edema	629	99	0	—c	≤ 1	0	—c	≤ 2	≤ 4
992.8–Other specified heat effects	16,135	91	5	1,585	9	4	11	0	5
992.9–Unspecified	11,848	96	4	410	3	1	26	0	11
Data were pooled for 2006–2010; ED visits between 1 May and 30 September were included; sample weights were used. Patients could have more than one diagnosis of acute heat illness during a visit. Total diagnoses count therefore is greater than the number of patients. aFor each specific heat diagnosis, Row % refers to the percentage of patients with different ED disposition. bFor each ED disposition, Column % refers to the percentage of patients with different heat diagnoses. cCounts ≤ 10 were suppressed per AHRQ guidance.