Table 1.

Patient Demographic Data.

Variable	Number of patients (n=95)	Group 1 (n=67)	Group 2 (n=28)	P value
Age (yr)	80.6 (64–103)	78.9 (64–96)	84.8 (70–103)	0.0009
BMI (kg/m2)	22.0 (16.0–31.2)	22.1 (12.0–32.2)	21.7 (15.6–29.8)	0.6190
Level (n)
T10	4	3	1
T11	8	5	3
T12	36	26	10	0.3339
L1	36	28	8
L2	11	5	6

Data are expressed as mean±standard deviation.

BMI, body mass index