Employability (as a full time worker, homemaker, or student) disability indicator, as part of the Disability Rating Scale (DRS)
Rappaport, M., Hall K.M., Hopkins, K., Belleza, T., Cope, D.N. (1982). Disability Rating Scale for Severe Head Trauma: Coma to Community. Archives of Physical Medicine and Rehabilitation, 63: 118-123. The COMBI website (http://www.tbims.org/combi/drs/index.html) has further information on the instrument and becoming a certified DRS rater.