1. A computer implemented method for information extraction and patient performance assessment comprising: receiving documents for analysis, the documents including key information in both text and graphic format related to standards of medical care; in an application server: generating rules for key information indexing, extraction, conversion and storage searching the documents for the key information and extracting the key information; verifying and editing the key information indexing the key information; storing the key information into a key information database of a database server based on the indexing; in the application server, extracting or importing patient key information from a group of patients having common indexes based on the extracting rules implementing the key information extracted from the documents of medical standards to patient(s) key information to assess patient(s) performance and outcomes.