Table 2.
Descriptive statistics [n (rate)] of patients with acute heat illness (ICD-9-CM codes 992.0–992.9) by ED disposition (n = 326,497).
| Variable | Treat and release | Admit to hospital | Death in ED |
|---|---|---|---|
| Year | |||
| 2006 | 61,182 (20.5) | 8,214 (2.75) | 99 (0.033) |
| 2007 | 59,641 (19.8) | 7,539 (2.5) | 38 (0.013) |
| 2008 | 48,668 (16) | 6,416 (2.11) | 27 (0.009) |
| 2009 | 42,517 (13.9) | 5,729 (1.87) | —a (≤ 0.004) |
| 2010 | 75,867 (24.5) | 10,494 (3.39) | 57 (0.018) |
| Age groups (years) | |||
| 0–17 | 44,342 (12) | 1,430 (0.39) | 102 (0.028) |
| 18–45 | 147,241 (26.2) | 11,432 (2.03) | —a (≤ 0.003) |
| 46–65 | 67,363 (17.1) | 12,634 (3.22) | 69 (0.018) |
| > 65 | 28,918 (14.9) | 12,896 (6.65) | 59 (0.031) |
| Sex | |||
| Male | 197,043 (25.5) | 28,591 (3.7) | 186 (0.024) |
| Female | 90,676 (12.1) | 9,801 (1.31) | 45 (0.006) |
| Hospital region | |||
| Northeast | 32,130 (11.7) | 3,997 (1.46) | 19 (0.007) |
| Midwest | 64,701 (19.5) | 7,365 (2.21) | 14 (0.004) |
| South | 146,630 (26.2) | 19,406 (3.46) | 80 (0.014) |
| West | 44,414 (12.6) | 7,623 (2.16) | 117 (0.033) |
| Median ZIP code income (quartile) | |||
| Lowest | 91,390 (23.9) | 13,372 (3.5) | 103 (0.027) |
| Second | 81,860 (21.6) | 9,957 (2.63) | 55 (0.014) |
| Third | 61,171 (16.2) | 7,613 (2.02) | 30 (0.008) |
| Highest | 45,174 (11.9) | 5,656 (1.49) | 23 (0.006) |
| Urban–rural classification | |||
| Large metropolitan | 112,067 (13.8) | 17,546 (2.16) | 114 (0.014) |
| Medium/small metropolitan | 99,258 (21.9) | 12,011 (2.65) | 60 (0.013) |
| Micropolitan | 43,781 (29) | 4,948 (3.27) | 30 (0.02) |
| Rural | 29,862 (29.7) | 3,340 (3.32) | 18 (0.018) |
| Payment sourceb | |||
| Medicare | 38,427 (17.7) | 14,950 (6.88) | 75 (0.035) |
| Medicaid | 35,713 (16.8) | 3,581 (1.68) | 70 (0.033) |
| Private insurance | 115,112 (11.5) | 10,058 (1) | 16 (0.002) |
| Uninsured | 67,062 (28.8) | 6,058 (2.6) | 48 (0.021) |
| Total number of observations under each category may be different due to missing data. Rates are per 100,000 population per year; denominators were obtained from AHRQ (2012). Data were pooled for 2006–2010; ED visits between 1 May and 30 September were included, and sample weights were used. aCounts ≤ 10 were suppressed per AHRQ guidance. bHealth insurance coverage status 2006–2010 obtained from the U.S. Census Bureau (2013). | |||