. 2021 May 3;8:23. doi: 10.1186/s40621-021-00310-4

Table 2.

Overall study flow for older drivers (D) and study partners (SP), following SPIRIT template of recommended content for the schedule of enrollment, interventions, and assessments (Chan et al. 2013)

	STUDY PERIOD
	Enrollment	Allocation		Post-allocation				Close-out
TIMEPOINT (months)	-t	t₀	t₀	t₀	t_{6 mo}	t_{12 mo}	t_{18 mo}	t_{24 mo}
ENROLLMENT
Eligibility screen	X^D,SP
Informed consent		X^D,SP
Randomization			X^D,SP
INTERVENTIONS
Driving decision aid			X^D,SP
Control website			X^D,SP
ASSESSMENTS
Immediate outcomes
Decision Conflict Scale		X^D,SP		X^D,SP	X^D	X^D,SP	X^D	X^D,SP
Knowledge questionnaire		X^D		X^D,SP	X^D	X^D,SP	X^D	X^D,SP
Values concordance (DCS Values Clarity subscale)		X^D,SP		X^D,SP	X^D	X^D,SP	X^D	X^D,SP
Decision Self-Efficacy scale		X^D		X^D,SP	X^D	X^D,SP	X^D	X^D,SP
Longitudinal outcomes
PROMIS Depression		X^D			X^D	X^D	X^D	X^D
Ottawa Decision Regret Scale					X^D	X^D,SP	X^D	X^D,SP
Life-Space Assessment		X^D			X^D	X^D	X^D	X^D
Driving behaviors		X^D			X^D	X^D,SP*	X^D	X^D,SP*
Subgroups
Cognitive screening (5-min MoCA)	X^D,SP				X^D	X^D,SP	X^D	X^D,SP
Cognitive function (BTACT, OTMT)		X^D
Beck Cognitive Insight Scale		X^D						X^D
Decisional capacity (SPACED)		X^D						X^D
Attitudes about driving (ARMT)		X^D			X^D	X^D	X^D	X^D
Driving behaviors		X^D,SP			X^D	X^D,SP*	X^D	X^D,SP*
Other covariates
Demographics		X^D,SP			X^D	X^D,SP	X^D	X^D,SP
Physical health		X^D			X^D	X^D	X^D	X^D
Mental health		X^D			X^D	X^D	X^D	X^D
Personality (TIPI)		X^D
Driving education		X^D,SP			X^D	X^D,SP	X^D	X^D,SP
Family questionnaire		X^SP				X^SP		X^SP
Major life events					X^D	X^D,SP*	X^D	X^D,SP*
COVID-19 related health				X^D,SP	X^D	X^D,SP	X^D	X^D,SP

*Questions about older driver, as answered by study partner