Utilization review: surveillance reduces admissions.
D000704:Analysis of Variance; D003695:Delivery of Health Care; D006739:Hospital Administration; D006760:Hospitalization; D006801:Humans; D007256:Information Systems; D007902:Length of Stay; D010380:Peer Review; D011366:Professional Review Organizations; D011787:Quality of Health Care; D014481:United States; D014600:Utilization Review