Vinyoles E, Tafalla M, Robledo V, et al. - Since the higher blood pressure (BP) arm is assigned as the follow-up arm for hypertensive patients (reference arm), researchers assessed this assignment's reproducibility. For this investigation, they measured BP simultaneously on both arms with a double cuff validated device in two visits separated < 10 days (two sets of three readings per visit). The intravisit and intervisit agreements of this assignment have been assessed. Three hundred thirteen hypertensive patients were included in this analysis. Data reported that the first visit mean right arm BP was 131.6 (16.6)/75.3 (9.4) mmHg and left arm BP was 132.4 (16.9)/75.7 (9.7) mmHg. The authors concluded that the reference-arm assignment agreement is weak to moderate. The reference arm assignment should be individualized and not considered as final.