TABLE 1.

Demographics

	n=153 (%)
Demographics
Age (y)	63.2±8.3
Height (inches)	66.8±4.0
Weight (lbs)	189.4±37.4
BMI (kg/m2)	29.7±4.8
Sex (female)	90 (58.8)
Use of nicotine products
No, never smoked	98 (64.1)
No, but prior history	52 (34.0)
Current smoker	3 (2.0)
Prior lumbar surgery
Yes	9 (5.9)
No	144 (94.1)
Level implanted	n
L1/L2	0
L2/L3	0
L3/L4	8 (5.2)
L4/L5	145 (94.8)

Continuous Variables are Displayed as mean±SD. Categorical variables are displayed as number (percent).

BMI indicates body mass index, lbs, pounds.