Table 4.

Long-term post-intervention preventative effect on the incidence of type 2 diabetes in the former intervention groups compared to control groups in three randomized controlled lifestyle intervention studies.

Original Study	Risk Reduction	Comment
FDPS, Lindström J et al. Diabetologia 2013 [47]	Hazard Ratio 0.61, adjusted to 0.59 as compared to control group	Follow-up 13 years; follow-up data on the diet available
China Da Qing Diabetes Prevention Study, Li G et al. Lancet 2008 [46]	In total, 43% reduction in the combined intervention clinics as compared to control clinic	Follow-up 20 years; no detailed dietary data
Diabetes Prevention Program Group, Knowler WC et al. Lancet 2009 [49]	In total, 34% reduction in lifestyle intervention group and 18% reduction in metformin group as compared to placebo control group	Follow-up 10 year; no dietary data from the follow-up reported; long-term metformin use may modify the results