Lithotomy versus jack-knife position on haemodynamic parameters assessed by impedance cardiography during anorectal surgery under low dose spinal anaesthesia: a randomized controlled trial

Table 1 Patient demographics

Variable	Jack – knife (prone) position	Lithotomy position
Variable	n = 51	n = 51
Age (yrs)	46.2 ± 14	49.2 ± 13.4
Age (yrs)	(20 – 74)	(25 – 79)
Weight (kg)	80.9 ± 14.3	81.1 ± 14.6
Weight (kg)	(54 – 110)	(46 – 115)
Height (cm)	173.1 ± 9.1	173.9 ± 10.1
Height (cm)	(154 – 187)	(142 – 198)
Sensory level after 10 min, dermatomes	L2 – 1	L2 – 1
	L3 – 42	L3 – 40
	L5 – 5	L5 – 8
	S1 – 3	S1 – 2
Sex (F/M)	26/25	27/24
ASA I/II	19/33	21/31

ASA - American Society of Anesthesiologists (physical status classification system).
Values are mean ± SD (range) or ratio.

ISSN: 1471-2253