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. 2013 Aug 23;20(e2):e311–e318. doi: 10.1136/amiajnl-2013-001922

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Clustering of concepts and laboratory values based on their lagged linear correlations with emergency department events. The x-axis shows the unitless single-link distance, with length of the horizontal line in the dentrogram representing the distance between the connected clusters. Compared to figure 4, the laboratory results are further dispersed (brackets and arrows). afib, atrial fibrillation; alt, alanine aminotransferase; ast, aspartate aminotransferase; ck, creatine kinase; cmv, cytomegalovirus; copd, chronic obstructive pulmonary disease; cri, chronic renal insufficiency; cva, cerebrovascular accident; hctz, hydrochlorothiazide; inr, international normalized ratio; mrsa, methicillin-resistant Staphylococcus aureus; pt, prothrombin time; ptt, partial thromboplastin time; rbc, red blood cells; tb, tuberculosis; uti, urinary tract infection; vtach, ventricular tachycardia; wbc, white blood cells.