Table 6.

Multiple linear regression model of predictors for study duration.

Variable	R2a	Bb	SEBc	βd	P value
Constant		13.79	2.31		<.001
Data collection frequency (2 vs 4+ data collection points)	.12	10.71	3.68	.33	.005
Masking (single vs open-blinded)	.20	6.88	3.50	.23	.055
Sample size	.26	0.04	0.01	.31	.009
Study sponsorship (academic vs industry)	.33	-12.00	5.33	-.26	.028

^aR²: amount of accounted study duration variability.

^bB: unstandardized regression coefficient.

^cSE_B: standard error of the coefficient.

^dβ: standardized coefficient.