Table 1.

Demographics of Patients Before and After Mailed Letter Intervention

	Pre-intervention					Post-intervention
	All Patients	Adherent Pre-interventiona		P valueb		All Patients	Adherent Post-intervention		P value
		n	%				n	%
Age				.44	Age				.72
25-49	5	2	40		25-49	5	2	40
50-59	10	1	10		50-59	10	4	40
60-69	17	6	35		60-69	17	8	47
70-89	13	5	38		70-89	13	8	62
Sex				.99	Sex				.14
Female	23	7	30		Female	23	14	61
Male	22	7	32		Male	22	8	36

^aAdherence is defined as having received 2 consecutive A1C tests 3 calendar months apart.

^bComparisons of adherence were made using the Chi-square test for four category age, and the Fisher’s exact test for dichotomous age and gender.