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Table 1 Model parameters, not specified by age group

From: Cost-effectiveness of mandatory bicycle helmet use to prevent traumatic brain injuries and death

Model parameters Value (registered cases TBI on ED) Source
Incidence of TBI (number of cases) 8016 Dutch Injury Surveillance System
TBI related mortality (number of cases) 124 CBS cause of death statistics
Years Lived with Disability after TBI (mean value) 6649 Dutch Burden of Injury Model
Years of life lost following TBI (mean value) 2089 Dutch Burden of Injury Model
Disability-adjusted life years (sum of YLL and YLD) 8738 Dutch Burden of Injury Model
Number of cyclists 13,468,742 Computed with data from CBS Statline
Helmet efficacy (RR: TBI with helmet vs. without helmet) 0.583 Computed with data from existing literature
Mean current helmet use rate 2% Dutch Injury Surveillance System
Mean helmet use rate following legislation 88% Computed with data from existing literature
Risk of TBI when helmeted 0.000347 Model outcome
Risk of TBI when unhelmeted 0.000595 Model outcome
Risk of death for TBI victim 0.015493 Model outcome
Mean medical costs per person with TBI € 4335 Model outcome
Incidence of work absenteeism* after TBI (number of cases) 2820 Model outcome
Mean work absenteeism costs* per person € 11,252 Model outcome
Mean working-days absent 36 Model outcome
Mean productivity loss due to mortality* € 12,054 Model outcome
Friction period 101 days Guideline [26]
Mean number of working hours per week 31 h CBS Statline
Net labor participation 75.80% CBS Statline
Mean wage per hour € 35.55 Manual for Costing Research, corrected for inflation
Mean helmet costs per year € 10 Estimate (see text)
  1. Work absenteeism costs and productivity loss were calculated with the friction-cost method
  2. *Only for age group 15–65 years