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Table 1 Patient baseline characteristics and haemodynamic parameters

From: Correlation of carotid corrected flow time and respirophasic variation in blood flow peak velocity with stroke volume variation in elderly patients under general anaesthesia

  All patients
(n = 97)
Responders (n = 41) Nonresponders (n = 56) P-value
Male/female 61/36 25/16 36/20 0.83b
Age, y 71.6(65–88) 71.2(65–84) 71.9(65–88) 0.50c
BMI, kg/m2 23.0 ± 2.5 23.2 ± 2.6 22.8 ± 2.5 0.37a
ASA PS I/II/III 16/52/29 6/20/15 10/32/14 0.47b
Diagnosis
 Stomach tumour 26 12 14 0.64b
 Intestinal tumour 63 27 36 1.00b
 Enterostomy closure 8 2 6 0.46b
Type of surgery
 Laparoscopic surgery 89 39 50 0.26b
 Open surgery 8 2 6 0.26b
 Comorbidities
 Hypertension 18 8 10 1.00b
 Diabetes mellitus 7 3 4 1.00b
 Coronary artery disease 3 2 1 0.57b
 Baseline SBP, mmHg 130.9 ± 10.7 129.8 ± 12.0 131.6 ± 9.8 0.42a
 Baseline DBP, mmHg 71.0 ± 8.1 71 ± 8.6 70.9 ± 7.8 0.95a
 Baseline MAP, mmHg 90.9 ± 7.9 90.5 ± 7.8 91.2 ± 8.1 0.66a
 Baseline HR, beats/min 69.2 ± 9.0 68.7 ± 10.1 69.6 ± 8.3 0.65a
 Baseline carotid FTc, ms 343.2 ± 10.1 337.2 ± 9.1 347.6 ± 8.5  < 0.001a
 Baseline ΔVpeak, % 10.7 ± 2.3 12.4 ± 1.8 9.5 ± 1.8  < 0.001a
  1. Data are presented as the mean (standard deviation) or median (interquartile range)
  2. a Independent-sample t test
  3. b χ2 test
  4. c Mann–Whitney U test
  5. BMI Body mass index, ASA PS American Society of Anesthesiologists physical status, SBP systolic blood pressure, DBP diastolic blood pressure, MAP mean arterial pressure, HR heart rate, FTc carotid corrected flow time, ΔVpeak respirophasic variation in carotid artery blood flow peak velocity