Table 1.

Demographics of participating patients

Variable	Values
Age (mean years, SD)	64.8 (13.2)
Gender (N, %)
Male	76 (67.3)
Female	37 (32.7)
Income Quintile (N, %)a
1 (Lowest)	25 (23.4)
2	38 (35.1)
3	25 (25.2)
4	13 (12.5)
5 (Highest)	3 (2.8)
Missingb	2 (1.9)

^aDenominator = 107 (number of patients used for subsequent carbon footprint analysis)

^bMissing values due to inability to appropriately perform geocoding