Men: results of univariate analysis of risk factors for the onset of impaired fasting glucose* according to fasting plasma glucose levels.

Quartile 1: fasting plasma glucose <5 mM; quartile 2: fasting plasma glucose 5–5.22 mM; quartile 3: fasting plasma glucose 5.23–5.49 mM; quartile 4: fasting plasma glucose 5.55–6.10 mM.

*Onset of impaired fasting glucose was defined as a fasting plasma glucose level ≥6.11 mM.

Men: results of univariate analysis of risk factors for the onset of impaired fasting glucose* according to fasting plasma glucose levels.