Table 2.

Communication with research doctor and perception of being informed

	Informed/fully informed Mean (SD)	Not at all to unsure Mean (SD)	t statistics, p value	Cohen’s d (effect size)
Communication Total Score
How well informed when enrolled in treatment clinical trials	4.45 (0.52) n=95	4.06 (0.70) n=11	−2.26, p=0.026	0.63
How well informed at this point of participation	4.45 (0.53) n=96	4.03 (0.62) n=10	−2.36, p=0.020	0.73
How well informed about changes in study	4.48 (0.53) n=82	4.15 (0.57) n=23	−2.55, p=0.012	0.60
Communication Information exchange
How well informed when enrolled in treatment clinical trials	4.38 (0.58) n=95	3.86 (0.79) n=11	−2.73, p=0.007	0.75
How well informed at this point of participation	4.38 (0.58) n=96	3.77 (0.71) n=10	−3.14, p=0.002	0.94
How well informed about changes in study	4.42 (0.58) n=82	3.98 (0.65) n=23	−3.13, p=0.002	0.71
Relational Communication
How well informed when enrolled in treatment clinical trials	4.55 (0.53) n=95	4.36 (0.66) n=11	−1.09, p=0.277	0.32
How well informed at this point of participation	4.55 (0.55) n=96	4.42 (0.58) n=10	−0.71, p=0.478	0.23
How well informed about changes in study	4.56 (0.54) n=82	4.41 (0.56) n=23	−1.16, p=0.249	0.27

Note: Cohen’s d effect size: small=0.2, moderate=0.5, large=0.8