Neonatal outcomes of extremely preterm infants from the NICHD Neonatal Research Network

Barbara J Stoll, Nellie I Hansen, Edward F Bell, Seetha Shankaran, Abbot R Laptook, Michele C Walsh, Ellen C Hale, Nancy S Newman, Kurt Schibler, Waldemar A Carlo, Kathleen A Kennedy, Brenda B Poindexter, Neil N Finer, Richard A Ehrenkranz, Shahnaz Duara, Pablo J Sánchez, T Michael O'Shea, Ronald N Goldberg, Krisa P Van Meurs, Roger G Faix, Dale L Phelps, Ivan D Frantz 3rd, Kristi L Watterberg, Shampa Saha, Abhik Das, Rosemary D Higgins, Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network, Alan H Jobe, Michael S Caplan, Avroy A Fanaroff, Edward F Donovan, Kate Bridges, Barbara Alexander, Cathy Grisby, Marcia Worley Mersmann, Holly L Mincey, Jody Hessling, C Michael Cotten, Kathy J Auten, Melody B Lohmeyer, David P Carlton, Ann M Blackwelder, Michelle Tidwell, Stephanie Wilson Archer, James A Lemons, Diana D Appel, Dianne E Herron, Lucy C Miller, Leslie Richard, Leslie D Wilson, Faithe Hamer, W Kenneth Poole, Betty K Hastings, Elizabeth M McClure, Jeanette O'Donnell Auman, Carolyn Petrie Huitema, Kristin M Zaterka-Baxter, David K Stevenson, Marian M Adams, M Bethany Ball, Melinda S Proud, Andrew W Palmquist, Brenda L MacKinnon, Ellen Nylen, Monica V Collins, Shirley S Cosby, Maynard R Rasmussen, Paul R Wozniak, Kathy Arnell, Clarence Demetrio, Chris Henderson, Wade Rich, John A Widness, Karen J Johnson, Ruth Everett-Thomas, Conra Backstrom Lacy, Linda J Reubens, Erica Burnell, Sheldon B Korones, Abbot R Laptook, Charles R Rosenfeld, Walid A Salhab, Gaynelle Hensley, Melissa H Leps, Nancy A Miller, Jon E Tyson, Esther G Akpa, Patty A Cluff, Anna E Lis, Georgia E McDavid, Claudia I Franco, Beverly Foley Harris, Sarah Martin, Maegan C Simmons, Patti Pierce Tate, Bradley A Yoder, Karen A Osborne, Jennifer J Jensen, Cynthia Spencer, Kimberlee Weaver-Lewis, Robert G Dillard, Nancy J Peters, Rebecca Bara, Geraldine Muran, William Oh, Angelita M Hensman, Patricia Gettner, Monica Konstantino, JoAnn Poulsen, Janet Taft, Barbara J Stoll, Nellie I Hansen, Edward F Bell, Seetha Shankaran, Abbot R Laptook, Michele C Walsh, Ellen C Hale, Nancy S Newman, Kurt Schibler, Waldemar A Carlo, Kathleen A Kennedy, Brenda B Poindexter, Neil N Finer, Richard A Ehrenkranz, Shahnaz Duara, Pablo J Sánchez, T Michael O'Shea, Ronald N Goldberg, Krisa P Van Meurs, Roger G Faix, Dale L Phelps, Ivan D Frantz 3rd, Kristi L Watterberg, Shampa Saha, Abhik Das, Rosemary D Higgins, Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network, Alan H Jobe, Michael S Caplan, Avroy A Fanaroff, Edward F Donovan, Kate Bridges, Barbara Alexander, Cathy Grisby, Marcia Worley Mersmann, Holly L Mincey, Jody Hessling, C Michael Cotten, Kathy J Auten, Melody B Lohmeyer, David P Carlton, Ann M Blackwelder, Michelle Tidwell, Stephanie Wilson Archer, James A Lemons, Diana D Appel, Dianne E Herron, Lucy C Miller, Leslie Richard, Leslie D Wilson, Faithe Hamer, W Kenneth Poole, Betty K Hastings, Elizabeth M McClure, Jeanette O'Donnell Auman, Carolyn Petrie Huitema, Kristin M Zaterka-Baxter, David K Stevenson, Marian M Adams, M Bethany Ball, Melinda S Proud, Andrew W Palmquist, Brenda L MacKinnon, Ellen Nylen, Monica V Collins, Shirley S Cosby, Maynard R Rasmussen, Paul R Wozniak, Kathy Arnell, Clarence Demetrio, Chris Henderson, Wade Rich, John A Widness, Karen J Johnson, Ruth Everett-Thomas, Conra Backstrom Lacy, Linda J Reubens, Erica Burnell, Sheldon B Korones, Abbot R Laptook, Charles R Rosenfeld, Walid A Salhab, Gaynelle Hensley, Melissa H Leps, Nancy A Miller, Jon E Tyson, Esther G Akpa, Patty A Cluff, Anna E Lis, Georgia E McDavid, Claudia I Franco, Beverly Foley Harris, Sarah Martin, Maegan C Simmons, Patti Pierce Tate, Bradley A Yoder, Karen A Osborne, Jennifer J Jensen, Cynthia Spencer, Kimberlee Weaver-Lewis, Robert G Dillard, Nancy J Peters, Rebecca Bara, Geraldine Muran, William Oh, Angelita M Hensman, Patricia Gettner, Monica Konstantino, JoAnn Poulsen, Janet Taft

Abstract

Objective: This report presents data from the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network on care of and morbidity and mortality rates for very low birth weight infants, according to gestational age (GA).

Methods: Perinatal/neonatal data were collected for 9575 infants of extremely low GA (22-28 weeks) and very low birth weight (401-1500 g) who were born at network centers between January 1, 2003, and December 31, 2007.

Results: Rates of survival to discharge increased with increasing GA (6% at 22 weeks and 92% at 28 weeks); 1060 infants died at <or=12 hours, with most early deaths occurring at 22 and 23 weeks (85% and 43%, respectively). Rates of prenatal steroid use (13% and 53%, respectively), cesarean section (7% and 24%, respectively), and delivery room intubation (19% and 68%, respectively) increased markedly between 22 and 23 weeks. Infants at the lowest GAs were at greatest risk for morbidities. Overall, 93% had respiratory distress syndrome, 46% patent ductus arteriosus, 16% severe intraventricular hemorrhage, 11% necrotizing enterocolitis, and 36% late-onset sepsis. The new severity-based definition of bronchopulmonary dysplasia classified more infants as having bronchopulmonary dysplasia than did the traditional definition of supplemental oxygen use at 36 weeks (68%, compared with 42%). More than one-half of infants with extremely low GAs had undetermined retinopathy status at the time of discharge. Center differences in management and outcomes were identified.

Conclusion: Although the majority of infants with GAs of >or=24 weeks survive, high rates of morbidity among survivors continue to be observed.

Figures

FIGURE 1
FIGURE 1
Survival to discharge according to GA among 9575 VLBW infants born in NICHD NRN centers between January 1, 2003, and December 31, 2007. The thin lines indicate ranges across centers.
FIGURE 2
FIGURE 2
Median length of hospitalization (in weeks) and median PMA at discharge (in weeks) according to GA at birth among 6859 VLBW infants who were born in NICHD NRN centers between January 1, 2003, and December 31, 2007, and survived to discharge.

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