Table 3.

Progression time of SD and superficial carcinoma.

Onset diagnosis	Follow-up diagnosis
	SD				Superficial carcinoma
	Number	Time intervals†	Mean†	Median†	Number	Time intervals†	Mean†	Median†
Esophagitis	5	43–76	55.0	43	—	—	—	—
mD	16	13–77	49.8	56	5	44–98	76.0	77
MD	27	19–86	38.0	31	5	31–75	57.4	63
SD	17	5–89	33.8	30	8	24–86	47.0	35

^†The unit is month.