Table 4. Multiple linear regression models of the association between the RMMRI-9 and post-SI-2 CRAI-19 overall and each subscale, controlling for the respective baseline CRAI-19 measure and cohort, n=108^a.

	Adjusted R2	Standardized Beta	t	P
Model 1, CRAI-19 Overall
(Constant)			2.445	.016
CRAI-19 overall, baseline		.553	6.906	<.001
Cohort	.355	.066	.848	.398
RMMRI-9	.415	.261	3.406	.001
Model 2, CRAI-19 Writing subscale
(Constant)			2.268	.025
CRAI-19 subscale, baseline		.549	7.134	<.001
Cohort	.366	-.050	-.657	.513
RMMRI-9	.421	.249	3.307	.001
Model 3, CRAI-19 Study design/data analysis subscale
(Constant)			2.020	.046
CRAI-19 subscale, baseline		.460	5.267	<.001
Cohort	.252	.002	.027	.979
RMMRI-9	.311	.259	3.153	.002
Model 4, CRAI-19 Collaboration/grant preparation subscale
(Constant)			2.079	.040
CRAI-19 subscale, baseline		.599	7.843	<.001
Cohort	.405	.144	1.953	.054
RMMRI-9	.448	.226	3.029	.003
Model 5, CRAI-19 Consent process subscale
(Constant)			2.673	.009
CRAI-19 subscale, baseline		.738	11.291	<.001
Cohort	.553	.140	2.152	.034
RMMRI-9	.557	.090	1.386	.169

RMMRI, Ragins and McFarlin Mentor Role Instrument; SI-2, second Summer Institute; CRAI, Clinical Research Appraisal Inventory.

a. Adjusted R² values are for variables entered at each step (CRAI-19 measures and cohort entered at step 1; RMMRI entered at step 2). All other data shown in the table are from the regression model at step 2.