Different Concentrations of Ropivacaine under Ultrasound Guidance on Quadratus Lumbar Muscle Nerve Block in Elderly Patients with Hip Replacement

Table 1

General information of patients.

Groups	Age (years)	Male/female	Height (cm)	Body weight (kg)	BMI (kg/m^2)	ASA grade (I/II/III)
Control group		15/15				2/19/9
Observation group		16/14				2/18/10
/	0.10	0.52	0.12	1.65	0.08	-2.42
	0.968	0.865	0.971	0.746	0.966	0.362

Note: BMI: body mass index; ASA: American Society of Anesthesiologists.