Table 1.

Baseline characteristics of patients and caregivers

Characteristic	Patients n=13 (%)	Caregivers n=4
Male sex, %	7 (54)	2 (50)
Caucasian race, %	13 (100)	4 (100)
Mean age, years	68.1±7.2	63.3±7.7
Supplemental oxygen		N/A
None	1
Exertion only	5
Continuous	7
Disease duration, years	5.7±4.4	N/A