In comparison with individuals in the lowest tertile ( -0.78 0.29 mg/dL ) , the hazard ratio ( HR ) and 95 % CI for diabetes incidence in individuals in the higher tertile of change ( 0.52 0.13 mg/dL ) during follow-up was 3.48 ( 95 % CI 1.48-8 .17 ; P for trend = 0.01 ) .