About 800 nursing assistants and other workers at two Connecticut hospitals voted Friday not to establish a union. Workers at Danbury Hospital and New Milford Hospital had said inadequate staffing and better treatment were top concerns in the drive to unionize. AFT Connecticut led the organizing drive and wanted to negotiate for higher pay, which is now between $12 and $20 an hour. Vote tallies were not available late Friday, but Matt O'Connor, spokesman for AFT Connecticut, said in an emailed statement that the vote was decided by a narrow margin.