Table 1

Patient Demographics.

DemographicOne-LevelTwo-Level
N (No.)3834
Age (Mean ± SD)58.4 ±12.749.3±10.9
BMI (Mean ± SD)30.6±6.0830.1±5.82
Male (%)11 (28.9)14 (41.2)
Female (%)27 (71.1)20 (58.8)