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TABLE 1

Characteristics of Study Population

CharacteristicTotal
Study population, n (%) 10 367 (100) 
Sex, n (%)  
 Male 5319 (51.3) 
 Female 5048 (48.7) 
Race and/or ethnicity, n (%)a  
 White, non-Hispanic 4414 (48.9) 
 Black, non-Hispanic 1914 (21.2) 
 Hispanic 1314 (14.6) 
 Asian 1183 (13.1) 
 Multiracial or other 197 (2.2) 
Insurance, n (%)a  
 Public 5467 (56.4) 
 Private 4229 (43.6) 
 Uninsured 1 (0.0) 
Maternal language, n (%)a  
 English 7412 (77.2) 
 Spanish 934 (9.7) 
 Other 1255 (13.1) 
Gestational age, n (%)a  
 37–43 wk 8302 (80.7) 
 <37 wk 1991 (19.3) 
  34–36 wk 1053 (10.2) 
  23–33 wk 938 (9.1) 
Birth wt, n (%)a  
 ≥2500 g 8557 (83.3) 
 1500–2499 g 1146 (11.2) 
 <1500 g 568 (5.5) 
Birth year, n (%)  
 2008 1829 (17.6) 
 2009 1820 (17.6) 
 2010 1791 (17.3) 
 2011 1669 (16.1) 
 2012 1621 (15.6) 
 2013 1637 (15.8) 
Birth hospitalization duration, median (interquartile range), ha 49.5 (33.0–78.4) 
Birth hospitalization service, n (%)  
 Newborn nursery 7458 (71.9) 
 Intermediate care nursery 1522 (14.7) 
 NICU 1387 (13.4) 
CharacteristicTotal
Study population, n (%) 10 367 (100) 
Sex, n (%)  
 Male 5319 (51.3) 
 Female 5048 (48.7) 
Race and/or ethnicity, n (%)a  
 White, non-Hispanic 4414 (48.9) 
 Black, non-Hispanic 1914 (21.2) 
 Hispanic 1314 (14.6) 
 Asian 1183 (13.1) 
 Multiracial or other 197 (2.2) 
Insurance, n (%)a  
 Public 5467 (56.4) 
 Private 4229 (43.6) 
 Uninsured 1 (0.0) 
Maternal language, n (%)a  
 English 7412 (77.2) 
 Spanish 934 (9.7) 
 Other 1255 (13.1) 
Gestational age, n (%)a  
 37–43 wk 8302 (80.7) 
 <37 wk 1991 (19.3) 
  34–36 wk 1053 (10.2) 
  23–33 wk 938 (9.1) 
Birth wt, n (%)a  
 ≥2500 g 8557 (83.3) 
 1500–2499 g 1146 (11.2) 
 <1500 g 568 (5.5) 
Birth year, n (%)  
 2008 1829 (17.6) 
 2009 1820 (17.6) 
 2010 1791 (17.3) 
 2011 1669 (16.1) 
 2012 1621 (15.6) 
 2013 1637 (15.8) 
Birth hospitalization duration, median (interquartile range), ha 49.5 (33.0–78.4) 
Birth hospitalization service, n (%)  
 Newborn nursery 7458 (71.9) 
 Intermediate care nursery 1522 (14.7) 
 NICU 1387 (13.4) 
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