Fewer autoantibody-positive than autoantibody-negative patients had metabolic syndrome ( 64 vs. 80 % ) , and more were on insulin ( 56 vs. 17 % ) ( P < 0.0001 for each ) without lower HbA1c ( 69 mmol/mol [ 8.5 % ] vs. 62 mmol/mol [ 7.8 % ] ) .