Figure 1:

Study population. Of 2966 participants, 988 had documented biopsy results and 133 had undergone kidney biopsy before baseline but did not have documented results. Of the 988 participants, after excluding 210 participants with other kidney diseases or no diagnosis, analysis A had 778 participants. Analysis B had 1117 participants who had a medical history of DM. Analysis A was composed of six disease categories: IgAN, MN, focal segmental glomerulosclerosis FSGS, crescentic GN, classic DN and nephrosclerosis. Analysis B was composed of three groups: biopsy results not available (n = 880), DN (n = 46) and other pathological diagnoses (n = 191)