The calculation by your employer as to the number of hours worked was more than likely an average for the year.  Each state has rules about calculating hours for every type of payment: disability, unemployment, etc. What you may not realize is that the last few months that you worked the 40 hours plus may have bumped up the months that were less than the 36 hour average you ended up with.  I would check with a disability attorney in your area as to the temporary award and the possibility of going on permanent disability.  This way you can cover all base and see which avenue is best for you.  Good luck.