NY -- Standard&Poor's CreditWire 12/01/97 -- Standard&Poor's affirmed its single-'A' rating to New Jersey Health Care Facility Finance Authority's revenue bonds issued for Medical Center at Princeton. The rating reflects a stable financial profile tempered only by a relatively high debt burden for a single-'A' rated credit, dominant market position, and increasing managed care penetration. Princeton's admission base has been stable for five years at almost 13,000 while outpatient and home health visits have grown. Princeton's revenue base is diversified as reflected by their bed complement - 286 acute care, 76 long-term care, 17 rehabilitation, and 70 psychiatry and substance abuse beds. The operating and excess margins have been stable at around 1.7% and 2.7%, respectively,