Table 1

Percentage using handheld cell phones in New York and Connecticut cities before and after effective date of New York State cell phone law

Percentage cell phone use: %(No)
Post-lawPercentage point differences in use rates (95% CI)
Pre-lawShort term (December 2001/March 2002)Follow up (March 2003)Short term v pre-law observationsFollow up v short term observationsFollow up v pre-law observations
*Statistically significant (p<0.05) based on test of difference in proportions.
Connecticut (two cities combined)2.9 (7110)2.9 (14205)3.3 (6992)−0.1 (–0.4 to 0.5)0.4 (−0.1 to 0.9)0.4 (−0.2 to 1.0)
New York (four cities combined)2.3 (11768)1.1 (25694)2.1 (12571)−1.2* (−1.5 to −0.9)1.0* (0.7 to 1.2)−0.2 (−0.6 to 0.2)
    Albany2.2 (3537)0.8 (8328)2.1 (3917)−1.5* (−2.0 to −1.0)1.3* (0.8 to 1.8)−0.2 (–0.8 to 0.5)
    Binghamton2.2 (3327)0.8 (6198)0.7 (2872)−1.4* (−2.0 to −0.9)−0.1 (−0.5 to 0.3)−1.6* (−2.1 to −1.0)
    Kingston1.9 (2805)1.1 (6329)2.1 (2901)−0.8* (−1.4 to −0.3)1.0* (0.4 to 1.6)0.2 (−0.5 to 0.9)
    Spring Valley3.0 (2099)2.3 (4839)3.5 (2881)−0.7 (−1.6 to 0.1)1.2* (0.4 to 2.0)0.5 (−0.5 to 1.5)