TABLE 1.

Data continuity during follow-up, by baseline continuity requirement, among oral hypoglycemic agent users who were eligible to be followed for at least 24 months in the Integrated Medical Database of National Taiwan University Hospital (n = 32,081).

		No baseline continuity requirement	At least 6 months of baseline continuity	At least 12 months of baseline continuity
		n = 32,081	n = 5,172	n = 3,205
		N (%)	N (%)	N (%)
With data continuity during follow-up (months)	3	29,972 (93)	4,961 (96)	3,099 (97)
	6	27,817 (87)	4,686 (91)	2,986 (93)
	9	26,474 (83)	4,493 (87)	2,895 (90)
	12	25,444 (79)	4,336 (84)	2,813 (88)
	15	24,653 (77)	4,211 (81)	2,758 (86)
	18	23,900 (75)	4,079 (79)	2,677 (84)
	21	23,216 (72)	3,956 (77)	2,610 (81)
	24	22,544 (70)	3,845 (74)	2,553 (80)