The Bethlem and Maudsley Hospital item sheets (B-MIS) are summaries in coded form which are completed for every patient admitted or readmitted to the joint hospitals. The Part 1 item sheet contains information which is included in the Part 1 case summary, as described in Notes on Eliciting and Recording Clinical Information, and is completed at the same time as the summary is prepared; that is, usually within a fortnight of the patient entering hospital. Similarly, the Part 2 item sheet contains information normally found in the discharge summary, and is completed at the same time that this summary is prepared; shortly after the patient has left hospital. The item sheets are restricted to pieces of information which can be readily coded by the registrar. Thus, of necessity, they concentrate on relatively ‘hard’ data.