Table 1.

Number and proportion of patients who reached each stage during the disease progression.

Disease stage	Number	Number and % in Stage 1	Number and % in Stage 2	Number and % in Stage 3	Number and % in Stage 4	Number and % in Stage 5	Number and % remained
Stage 1	1,473	–	1,145 (77.73%)	252 (17.11%)	27 (1.83%)	13 (0.07%)	36 (2.44%)
Stage 2	1,145	–	–	883 (77.12%)	129 (11.27%)	39 (3.40%)	94 (8.21%)
Stage 3	1,135	–	–	–	816 (71.89%)	145 (12.78%)	174 (15.33%)
Stage 4	972	–	–	–	–	667 (68.62%)	305 (31.38%)