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Table 2 Preoperative, pre-induction and intraoperative blood pressure. Values are median (IQR [range])

From: Care of elderly patients: a prospective audit of the prevalence of hypotension and the use of BIS intraoperatively in 25 hospitals in London

  Preoperative (mmHg) Pre-induction (mmHg) Lowest intraoperative (mmHg) Difference between preoperative and pre-induction value (Wilcoxon matched pairs)
Systolic 140 [125–151 (90–209)] 140 [125–155 (80–215)] 90 [80–100 (46–157)] p = 0.02
Diastolic 77 [69–85 (23–114)] 78 [68–85 (38–178)] 50 [42–58 (25–94)] p = 1.00