Preterm births (annual) in Washington

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Definitions: The number and percent of babies born with a gestational age of less than 37 completed weeks.

Data Source: The data used for this measure come from Center for Health Statistics, Washington State Department of Health (DOH), Birth Data, Infant Health Table D8. Data were downloaded on May 18, 2016 from

S: Data estimate has been suppressed. When the annual number of preterm births was 10 or fewer, percent is not shown. Data presented here are annual estimates. We did not calculate three year averages for this indicator as the majority of the counties, in the majority of the years, reported preterm births were more than 10.

Footnotes: Data last updated in May 2016 by Washington KIDS COUNT. 

DOH technical notes on measurement issues are available at