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Table 1 Observational and self-reported data on seat belt use by rear seat passengers by gender and year (2003 and 2005), Veneto Region, Italy

From: Seat belt use among rear passengers: validity of self-reported versus observational measures

  Observational Self-reported* Over-reporting
  Sample
size
Belted %
(95% CI)
P value Sample
size
Belted %
(95% CI)
P value factor
2003          
Male 1653 10.6 (9.1 – 12.1) 0.276 1869 13.5 (12.0 – 15.1) 0.001 1.3
Female 2422 11.7 (10.4 – 13.0)   2021 17.5 (15.8 – 19.1)   1.5
2005          
Male 1853 25.0 (23.0 – 27.0) 0.064 1338 35.8 (33.2 – 38.4) 0.070 1.4
Female 2210 27.6 (25.7 – 29.4)   2410 38.8 (36.9 – 40.7)   1.4
  1. * Percentages calculated without missing data (112/4002 for 2003; 152/3900 for 2005)