The "Hospitalization in the United States, 2002" fact book from the Agency for Healthcare Research and Quality (AHRQ) contains information about the incidence of neonates being in the top 10 category risk for hospitalization. This fact book is also included in the bibliography for IHI's IMPACT Learning and Innovation Community on Improving Perinatal care.

Source:

Merrill CT, Elixhauser A. Hospitalization in the United States, 2002. Rockville, MD: Agency for Healthcare Research and Quality, 2005. HCUP Fact Book No. 6. AHRQ Publication No. 05-0056. ISBN 1-58763-217-9.