Headlight operation-what was the design of the study

Reference no: EM13327624

A study by concerning motorcycle conspicuity examined daytime headlight operation. The study included 277 motorcyclists who died between 2002 and 2009. Among those who died, 72 did not have their headlight on. The authors also recruited 926 motorcycle riders who did not die during this time. 207 did not have their headlights on. What was the design of the study?

1. Retrospective cohort

2. Ecological

3. Cross-Sectional

4. Case Control

5. Nested case-control.

Reference no: EM13327624

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