The Heller School For Social Policty And Management The Heller School For Social Policy and Management Brandeis University
Proportion of Low Birthweight Births That Were Preterm
Year: 2007-2008; Region: 50 Largest MSAs

Year
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  57.5% 58.6% 59.6% 60.7% 61.8% 62.8% 63.9% 64.9% 66.0%
  57.0% 58.1% 59.1% 60.2% 61.2% 62.3% 63.4% 64.4% 65.5% 66.5%
 

# of MSAs

                          Chi...          
                          San...          
                          Buf...          
5                     Aus...     Las...          
                    San... Sal...   Jac...          
                  New... Okl... Lou... Por... Bal...     Roc...    
          Nas...   Det... Pit... Los... Riv... San... Was... Sea... Atl...   Mia... Sac...  
          Vir...   Hou... New... Tam... Cle... Mem... Pho... Cha... Bos...   Orl... Kan...  
0 Den...         Ric... Cin... Ind... Bir... Dal... Mil... Pro... St.... San... Phi... Har... Col... Min...  
  57.0% 58.1% 59.1% 60.2% 61.2% 62.3% 63.4% 64.4% 65.5% 66.5%
  57.5% 58.6% 59.6% 60.7% 61.8% 62.8% 63.9% 64.9% 66.0%
 

Definition: The share of low birthweight births that are preterm.

Notes: Low birthweight defined as weighing less than 2.5kg. Preterm defined as having a gestational age less than 37 weeks. Excludes metro areas with less than 100 low birthweight births to mothers in the specified subgroup over the specified time period. Excludes plural births and births which occurred abroad, in Puerto Rico, or in U.S. Territories. Metro area refers to the location of residence of the mother at the time of the birth.

Source: National Center for Health Statistics' Vital Statistics Natality Birth Data. Metro area level data aggregated from county level data obtained from NCHS by special request.