Complex sentence: About 80% of these light chain MGUS patients were initially found to progress to light chain multiple myeloma within 2 years and therefore were recommended for being diagnosed and treated as having light chain multiple myeloma.
Split into simpler sentences: About 80% of individuals bearing these light chain ratios were found to progress to light chain multiple myeloma within 2 years. In consequence, these individuals were recommended for being diagnosed and treated as having light chain multiple myeloma.