Table 2: Simple and multivariate regression examining the association between general payments in 2013-2015, research payments in 2013-2015, years since medical school graduation and prior publications, and publications in 2013-2016

Variable	Slope (95% CI)
Simple linear regression
General payments in 2013-2015, $10 000s	1.99 (1.07 to 2.90)
Multivariate regression	β coefficient (95% CI)
General payments in 2013-2015, $10 000s	0.836 (0.15 to 1.52)
Papers published before 2013	0.236 (0.213 to 0.260)
Years since graduating medical school	-1.39 (-1.77 to -1.02)
Total research payments, $10 000s	0.0255 (0.019 to 0.040)

Note: CI = confidence interval.