NT-3 expression was most strongly predicted by BMI (adjusted p < 0.0001; β = 0.41) and diabetes (adjusted p < 0.0001; β = 0.39), followed by smoking (adjusted p = 0.015; β = 0.28) and alcohol consumption (adjusted p = 0.028; β = 0.22). This evidence concerns the gene NTF3 and diabetes mellitus.