Fig 4.

Length of hospital stay according to the mRCRI group. (a) Median (25th–75th percentiles) length of stay for each preoperative mRCRI score. Asterisks denote differences between mRCRI groups (P=0.03). (b) Time-to-discharge analysis showing relationship between each preoperative mRCRI score and length of hospital stay (until 30 days after operation). (c) Length of stay was persistently higher in morbidity-free patients with preoperative mRCRI ≥3. For clarity, discharge rates for mRCRI grouped into scores ≥3 or <3 are shown as for (b), for 30 days after operation (P=0.01).