The CDMS can be broadly divided into paper-based and electronic<unk>  capturing<unk> s. Paper-based<unk> s Case report forms are manually filled at site and mailed to the company for which trial is being performed. The<unk>  on forms is transferred to the CDMS tool through<unk>  entry. The most popular method being double<unk>  entry where two different<unk>  entry operators enter the<unk>  in the<unk>  independently and both the entries are compared by the<unk> . In case the entry of a value conflicts,<unk>  alerts and a verification can be done manually. Another method is Single<unk>  Entry. The<unk>  in CDMS are then transferred for the<unk>  validation. Also, in these<unk> s during validation the<unk>  clarification from sites are done through paper forms, which are printed with the problem description and sent to the investigator site and the site responds by answering on forms and mailing them back. Electronic<unk>  capturing<unk> s In such CDMSs, the investigators directly upload the<unk>  on CDMS, and the<unk>  can then be viewed by the<unk>  validation staff. Once the<unk>  are uploaded by site, the<unk>  validation team can send the electronic alerts to sites if there are any problems. Such<unk> s eliminate paper usage in<unk>  trial validation of<unk> .
Clinical data management system
Patient tracking system
Enterprise master patient index
Hospital information system
Clinical decision support system
Patient administration system
Personal health record
Disease registry