Table 2.

Primary analysis: prevalence ratios for vehicle types by ownership model.

Vehicle type	Prevalence ratio of helmet use	CI	P-value
Personal only
Personal e-bike vs. Personal c-bike	0.99	0.94–1.04	0.544
Personal e-scooter vs. Personal e-bike	0.65	0.55–0.75	<0.0001
Shared only
Shared e-bike vs. Shared c-bike	0.99	0.79–1.24	0.959
Shared e-scooter vs. Shared e-bike	0.41	0.24–0.69	<0.0001
Dockless e-bike (shared) vs. Docked e-bike (shared)	0.58	0.44–0.76	<0.0001
Shared vs. Personal
Shared vs. Personal (All)	0.45	0.41–0.49	<0.0001
Shared c-bike vs. Personal c-bike	0.47	0.38–0.57	<0.0001
Shared e-bike vs. Personal e-bike	0.47	0.43–0.52	<0.0001
Shared e-scooter vs. Personal e-scooter	0.30	0.17–0.51	<0.0001

Bold values indicate statistical significance of the result.