To conclude, impairment ratings differ among various diseases and compensation programs. It therefore is important to note, at the outset, which compensation program the patient is eligible for because the requirements of the different programs may vary. The physician report must clearly state an opinion using terminology understandable to lay people. It should include the diagnosis, whether the condition is work-related or not, the evidence of impairment, and the severity of impairment. It should also state whether the resultant disability is temporary or permanent. In the case of work-related diseases, apportionment should be addressed. Finally, patients with advanced lung disease may be totally disabled from certain types of employment and yet may be eligible for vocational training. It is appropriate to describe the types of jobs and work the patient physically can and cannot do.