Fig. 1.

Distributions of cerebrospinal fluid MMP and TIMP levels across the hip fracture patients with no delirium (n = 139) and with delirium (n = 140). The violin plots show the entire distribution of each marker, whilst the inserted box plot shows the median (middle line), 1^st quartile (lower box limit) and 3^rd quartile (upper box limit). Black lines show the minimum (minimum data value – 1.5*interquartile range) and maximum (maximum data value + 1.5* interquartile range). Black circles show outliers. MMP matrix metalloproteinase, TIMP tissue inhibitor of matrix metalloproteinase.