Fig. 1
From: Categorisation of foot complaints in systemic lupus erythematosus (SLE) from a New Zealand cohort
Illustration of the strength of pair-wise correlations between variables. This figure illustrates the strength of correlations between variables using a pair-wise correlation matrix. Each of the reported variables is in a circle and a blue line indicates positive correlation between variables, whereas a red line indicates negative correlation. Furthermore the thickness of each line indicates the level strong relationship between variables, where a thicker line indicates a stronger relationship between variables