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. 2019 May;12(3):127–135.

Table 2.

Patient Demographic and Clinical Characteristics

Characteristics Overall sample (N = 525)
Age, mean (SD), yrs 56.1 (13.5)
Male, N (%) 304 (57.9)
US region
   East, N (%) 145 (27.6)
   Midwest, N (%) 131 (25.0)
   South, N (%) 216 (41.1)
   West, N (%) 33 (6.3)
Charlson Comorbidity Index, mean (SD) 1.4 (1.8)

SD indicates standard deviation.