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. Author manuscript; available in PMC: 2006 Jan 26.
Published in final edited form as: Acta Anaesthesiol Scand. 2004 Aug;48(7):894–898. doi: 10.1111/j.0001-5172.2004.00427.x

Table 1.

Morphometric and Perioperative Data

Nitrous Oxide Air P
Patients, n 175 169
Age, yr 57 (15) 60(14) 0.047
ASA status, I/II/III* 56/66/32 46/65/39 0.444
Sex, M/F 90/85 94/75 0.433
Weight, kg 73 (4) 74 (15) 0.528
Duration of surgery, h 3.0 (1.2) 3.4 (1.5) 0.017
IV fluids administered, L 3.9 (1.5) 3.9 (1.8) 0.804
End-tidal CO2, kPa 4.25 (0.33) 4.32 (0.35) 0.489
End-tidal Isoflurane, % 0.60 (0.15) 0.61 (0.15) 0.664
Mean arterial pressure, mmHg 80 (9) 85 (11) <0.001
Heart rate, beats per min 71 (11) 74 (13) 0.061

Values below line are averaged over the duration of surgery. Data presented as number of patients or means (SDs). * ASA status not recorded for all patients.