Table 3

Multivariate logistic regression analysis of factors associated with vitamin B12 deficiency

ModelVariablesOR (95% CI)P value
Model 1HbA1c0.624 (0.455–0.856)0.003
Duration of metformin use1.076 (1.005–1.151)0.037
Metformin dose1.002 (1.001–1.004)0.002
Model 2HbA1c0.631 (0.460–0.865)0.004
Long-term use of metformin (duration > median duration)10.078 (2.729–37.219)0.001
Metformin dose > median dose4.429 (1.475–13.303)0.008
Model 3HbA1c0.647 (0.480–0.874)0.005
MUI≥107.644 (2.109–27.707)0.002
  • MUI, metformin usage index;