Table 1.

Investigator demographic characteristics.

Variable	One-and-done Investigators, n (%) N = 109a
Age, yearsb
<35	0 (0.0)
35-44	21 (19.6)
45-54	27 (25.2)
55-64	40 (37.4)
≥65	19 (17.8)
Genderc
Female	33 (31.1)
Male	73 (68.9)
Raced
Asian	15 (14.3)
Black or African American	0 (0.0)
White	86 (81.9)
Other	4 (3.8)
Ethnicitye
Hispanic or Latino	6 (5.9)
Not Hispanic or Latino	95 (94.1)

^aUnless otherwise noted by clarifying missing data or identifying when investigators preferred not to respond.

^bOne investigator preferred not to respond; data missing from one.

^cOne investigator preferred not to respond; data missing from two.

^dFour investigators preferred not to respond.

^eFive investigators preferred not to respond; data missing from three.