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. Author manuscript; available in PMC: 2016 May 3.
Published in final edited form as: Acad Med. 2014 Apr;89(4):625–631. doi: 10.1097/ACM.0000000000000164

Figure 2.

Figure 2

Relationship of the number of patient-student interactions (touchpoints) and change in hemoglobin A1c values between initial presentation to the Shade Tree Clinic (T-0) and 12 ± 3 months later (T-1). The data suggest a trend that more touchpoints correlate with more improvement in A1c values. Linear regression found a non-significant best-fit line relating the two variables (slope 0.97; 95% confidence interval −0.19-2.13; P = .10, r2 = 0.06). The Y axis shows the change in A1c values from T-0 to T-1, with positive values indicating improvement (mean 1.7, standard deviation 2.3). The X axis shows the average number of touchpoints per month (mean 1.3, standard deviation 0.6). The dotted reference line indicates no change in A1c values, the solid black line, the best-fit line, and the gray areas, the 95% confidence interval.