Table 1.

Patient demographics

	Total knee replacement (n = 63)	Total hip replacement (n = 68)
Age (yr), mean ± SD	72.1 ± 8.3	68.7 ± 9.4
Gender (male:female)	22:41	27:41
Laterality (left:right:bilateral)	27:34:2	27:41:0
Height (m), mean ± SD	1.62 ± 0.09	1.66 ± 0.10
Weight (kg), mean ± SD	80.2 ± 15.1	82.6 ± 16.7
BMI (kg/m2), mean ± SD	30.4 ± 4.2	30.0 ± 5.5
ASA median (range)	2 (1-3)	2 (1-3)
SCQ median (range)	4 (0-15)	5 (0-18)

BMI: Body mass index; ASA: American Society of Anaesthesiologist Physical Classification System; SCQ: Self-Assessed Co-Morbidity Questionnaire.