Chronological age when healthcare transition skills are mastered in adolescents/young adults with inflammatory bowel disease

Table 4 Regression results for level and growth of total TRxANSITION Scale™ Score

Variable	Level effect		Growth effect
	Coefficient	P value	Coefficient	P value
Age	0.423	0.00	0.213	0.00
Female	0.412	0.05	0.03	0.90
Race: African American	-0.432	0.06	-0.06	0.87
Race: Other	-0.753	0.01	-0.431	0.09
Public insurance	-0.02	0.94	-0.963	0.01
No insurance	-0.701	0.07	-0.701	0.06
Age at diagnosis	-0.00	0.99	0.05	0.23
Lag total score			0.423	0.00
Constant	0.05	0.95	0.96	0.26
n	226		82
R square	0.32		0.52

¹Significance at 10%;

²Significance at 5%;

³Significance at 1%. Column 2-3 reported results from the first regression, where Sample 2 was used for the estimation. "Level effect" meant that the estimated coefficients reflect the marginal effects of the explanatory variables on the levels of total transition scores. Column 4-5 showed results from the second regression, where we included the lagged transition score as an additional independent variable and Sample 3 was used for estimation. "Growth effect" meant that conditional on the lagged transition score, the coefficients in the regression reflect the marginal effects of the explanatory variables on the growth in transition score between two scores. We estimated robust standard errors clustered at the patient level for both regressions.