UR = Unstable Rate. Rates based on numerators less than or equal to 20 may be unstable and should be interpreted with caution.
*To protect an individual's privacy, hospitalizations and ED visit counts from 1 to 5 are suppressed if the underlying population is less than or equal to 100,000.
Note: This table includes only carbon monoxide poisoning events that are unintentional and non-fire related.
** Person-years is equal to the sum of the population for each year.
For counts that are not whole numbers: We report counts by county, but receive them by zip code and some zip codes cross county borders. When that happens, we use a population-weighted method to split the case and assign a portion of it to each county. This is more accurate than assigning the whole count to only one county in the zip code.