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. 2017 Apr 3;40(7):887–893. doi: 10.2337/dc16-1509

Table 2.

Adjusted ORs for characteristics associated with metformin use (versus nonuse of metformin) in prediabetes (n = 7,464)

Characteristic OR (95% CI)* P
HbA1c ≥6% (ref. HbA1c <6%) 4.56 (2.48, 8.37) <0.001
Have health insurance (ref. no health insurance) 2.28 (0.85, 6.14) 0.10
History of hypertension (ref. no history of hypertension) 1.22 (0.57, 2.59) 0.61
Identified as overweight by doctor (ref. not identified as overweight by doctor) 3.27 (1.68, 6.37) 0.001
BMI ≥35 kg/m2 (ref. BMI <35 kg/m2) 1.63 (0.78, 3.42) 0.19

*Each OR adjusted for additional covariates: HbA1c ≥6%, health insurance status, history of hypertension, informed of overweight status by doctor, and BMI ≥35 kg/m2.