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. Author manuscript; available in PMC: 2021 Jun 2.
Published in final edited form as: Lancet Diabetes Endocrinol. 2019 Apr 26;7(6):452–461. doi: 10.1016/S2213-8587(19)30093-2

Figure 1: Study profile.

Figure 1:

After the original trial ended, all participants subsequently received routine medical care from their usual clinics and providers. *In 2009, review of death certificates and medical records only; no examinations were done. †Most loss to follow-up (31 of 36) occurred between 1986 and 1992, during the trial, when some participants were relocated to a newly discovered oil field and could no longer receive intervention or follow-up at their assigned clinics in Da Qing; in 2016, data were obtained for some participants who earlier had been reported as lost to follow-up.