| Â | Ridersa | Pillion ridersa | Totalb |
|---|
Helmet use | 77.8 | 36.3 | 57.1 |
Standard helmet use | 50.7 | 21.8 | 36.3 |
Full-face helmet use | 43.9 | 16.8 | 30.3 |
Proper helmet use | 34.9 | 14.0 | 24.5 |
Effective helmet use | 29.2 | 9.8 | 19.5 |
- Use per 100 person-minutes of observation = (Number of users × 100)/D
- D (Denominator) = Number of data collectors × number of days × (number of minutes/day)
- aFor Riders/Pillion riders = ( 1 × 28 × 90) = 2520 person-minutes of observation
- bFor total motorcyclists (riders + pillion) = (2 × 28 × 90) = 5040 person-minutes of observation
- Example for helmet use (riders) = 1961 × 100 /2520=77.8 helmet users per 100 person-minutes of observation
