Table 4 Participants' perceived willingness to be recruited by an LAR to critical care studies at different levels of risk

Blood draw

Low risk

206 (80.2)

21 (43.8)

28.16

< 0.001

5.19

2.72, 9.92

High risk*

51 (19.8)

27(56.2)

Mattress

Low risk

186 (72.4)

14 (29.2)

33.45

< 0.001

6.36

3.22, 12.56

High risk*

71 (27.6)

34 (70.8)

Brain sensor insertion

High risk

128 (71.1)

117 (93.6)

23.61

< 0.001

5.94

2.71, 13.0

Low risk*

52 (28.9)

8 (6.4)

Drug trial

High risk

134 (70.2)

101 (88.6)

13.73

< 0.001

3.31

1.72, 6.37

Low risk*

57 (29.8)

13 (11.4)