Research Article
Modeling and Syndromic Surveillance for Estimating Weather-Induced Heat-Related Illness
Table 4
Positive predictive value of chief complaint text strings associated with heat.
| String | Counts in heat-related visits | Counts in nonheatrelated visits | PPV(%) |
| Sun | 39 | 15 | 72.2 | Exhaust | 32 | 15 | 68.1 | Heat | 10 | 10 | 50.0 | Burn | 17 | 196 | 8.0 | Headache | 11 | 850 | 1.3 | Nausea | 9 | 1127 | 0.8 | Faint | 4 | 488 | 0.8 | Vomit | 17 | 2334 | 0.7 | Syncope | 19 | 4194 | 0.5 | Fever | 7 | 1553 | 0.4 | Fatigue | 4 | 981 | 0.4 | Weak | 13 | 5483 | 0.2 | Dizz | 13 | 5525 | 0.2 | Lighthead | 1 | 424 | 0.2 |
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