Table 4.

Number of errors of the patients (N = 462) in blood glucose self-testing at t1 and t2, respectively, in total and according to the different error categories.

Error category	Patients at t1 with > 1 errors		Average number of errors	Patients at t2 with > 1 errors		Average number of errors	p-value (t-test)
	[n]	[%]		[n]	[%]
Total	383	82.9	3.1	190	41.1	0.8	< 0.001
F1	283	61.3	1.5	111	24.0	0.4	< 0.001
F2	123	26.6	0.8	42	9.1	0.2	< 0.001
F3	240	52.0	0.8	62	13.4	0.2	< 0.001
F4	42	9.1	0.1	16	3.5	0.0	= 0.002
F5	225	48.7	0.6	74	16.0	0.2	< 0.001
F1 or F2	310	67.1	1.5	126	27.3	0.4	< 0.001