Study name Country Reference Follow‐up Study design Funding	Original cohort (N total) Exclusion criteria Study population (n, sex and age at baseline(a))	Outcome assessed	Exposure groups(a) n	Model covariates	Results
Japan Oo et al. (2018) 4 yr Prospective cohort Public	N = 76 Population sampled: general population going to Ishikawa Matto Central Hospital for a complete physical examination Excluded: having T2DM, pregnant n = 76 Sex (% F): 45 Ethnicity: Asian Age (yr): 51.9 ± 10.5	Fasting plasma glucose at 4 yr follow up visit	Plasma selenoprotein P (μg/mL) 2.51 (0.52)	age, Insulinogenic index, BMI, HbA1c	β‐coefficient 0.237 p =  0.033

BMI: body mass index; F: females; HbA1c: glycated haemoglobin: yr, year.

(a) Mean ± SD (range), unless specified otherwise.