Physical Capacity Profile®:
Work Comp Law

Permanent partial disability or permanent total disability shall be demonstrated and certifiedby a physician. Medical opinions addressing compensability and disability shall be stated within a reasonable degree of medical certainty. In determining compensability and disability, where inconsistent or conflicting medical opinions exist, objective medical findings shall prevail over subjective medical findings. Objective medical findings are those findings demonstrable on physical examination or by appropriate tests or diagnostic procedures.
Any award of compensation shall be reduced by an amount proportional to the permanent partial disability determined to be a preexisting disease or condition or attributed to the natural process of aging sufficient to cause or prolong the disability or need of treatment.

Missouri workers compensation law (pdf file)
Missouri’s Workers Compensation Statutes - www.moga.state.mo.us/statutes/c287.htm