Table 4.

Summary of outcomes and statistically significant results relating to getting patients to the visit

Type of intervention	Primary outcomes	Studies analyzing primary outcomes	Studies with significant results	References
Phone Reminder	↓HbA1c	5	5	[16, 28–31]*
	↓SBP	4	2	[29, 31] [28, 30]*
	↓Cholesterol	4	1	[28, 30, 31] [29]*
	↑# HbA1c tests	5	4	[32] [16, 25, 28, 30]*
	↑# of provider visits	2	2	[27, 28]*
	↓Hospitalization rate	2	1	[27] [32]*
	↑Eye exam	2	2	[30, 32]*
	↑Foot exam	3	3	[28, 30, 32]*
Letter Reminder	↓HbA1c	2	0	[26] [72]NP
	↓SBP	1	0	[26]
	↑# HbA1c tests	3	3	[24–26]*
	↑# of provider visits	1	1	[27]*
	↓Hospitalization rate	1	0	[27]
SMS Reminder	↓HbA1c	1	1	[33]*
	↓Cholesterol	1	1	[33]*
Financial incentive	↓SBP	1	1	[34]*
	↑# HbA1c tests	1	1	[24]*
	↑# of provider visits	1	0	[34]↓*
	↓ED visit rate	1	1	[34]*
	↓Hospitalization rate	1	0	[34]

*indicates significant findings with p-value≤0.05; ↓=decrease, ↑increase

NP p-value is not given