It is well known among physicians, employees and members of the Compensation Committee that there are many cloudy areas in the evaluation of persons who have sustained back injuries.

The physician's report can seldom be relied on wholly when it is mainly based on employee's statement regarding his injury.

The existing Table of Grades of Disability presently used by Labour Office is so simple and ambiguous, relative to back injury, that different opinions frequently occur, even though examining members attempt to be scientific and impartial.

This paper illustratrates a practical way of applying the Table of Grades of Disability as well as dimension of grades in relationship to the initial injury.