Table 2.

HbA1c levels (mmol/mol) at different time points and estimated changes between and within groups

SMBG frequency	Baseline	3 months	6 months	9 months	Estimated changes within groupsa
Weekly (A)	51.1 ± 4.7	52.1 ± 5.4	52.2 ± 5.0	54.4 ± 6.8	3.32 (− 1.38, 8.01)
Every 2 weeks (B)	51.6 ± 4.6	51.3 ± 7.8	50.2 ± 5.8	53.1 ± 5.8	1.50 (− 4.01, 7.01)
Monthly (C)	51.2 ± 5.6	51.1 ± 5.6	50.2 ± 9.0	51.8 ± 6.6	0.60 (− 4.33, 5.53)

Time (months)	Groupsb
	B minus A	C minus A	C minus B
3	− 0.62 (− 4.83, 3.59)	− 1.16 (− 5.10, 2.79)	− 0.53 (− 4.83, 3.77)
6	− 2.40 (− 7.31, 2.51)	− 2.51 (− 7.12, 2.10)	− 0.11 (− 5.02, 4.80)
9	− 1.72 (− 5.60, 2.17)	− 2.70 (− 6.35, 0.95)	− 0.98 (− 4.94, 2.98)

Data are mean ± SD, estimated changes (95% CI, Bonferroni corrected). All p values > 0.05

^aFrom baseline to 9 months

^bEstimated changes between groups adjusted for baseline differences