The rating on Michigan State Hospital Finance Authority's refunding hospital variable-rate bonds series 2000E, issued on behalf of Trinity Health, has been affirmed due to the bank facility being extended to Jan. 18, 2007. The long-term component of the rating is based on Ambac Assurance Corp. The short-term component of the rating is based on JPMorgan Chase Bank N.A. The stable outlook reflects the outlook of the bond insurer, Ambac Assurance Corp.