If you google Social Security Disability you will find a site that explains alot about SSDI. SSDI is Social Security Disability Insurance and it only looks at your contribution history. There are guidelines about your work history which qualify you for approval. It also says (and I've heard this alot lately) that at least 60% of first time applications are denied simply because the funds are not there to cover everyone and it also says that 80% of those who reapply are rejected. It recommends that you use a knowledgeable lawyer to help you.
SSI is Supplemental Security Income which does include your total family income in order to qualify.
The site that I found is socialsecurity-disability.org.
Good luck to all who are going through this battle. Not only are we fighting these illnesses but also the government. I feel very fortunate to have been approved the first time I tried. I just hope nothing changes in the coming years with the problems that our government is experiencing. We have got to get serious about the country's financial situation.
Southern Bell