Table 5 

Percentage Correct Responses^{1} to Survey Items on Knowledge about Tobacco Use Prevalence among Peers, High School Students, and Adults Among a Pooled 19 School Aggregate of 5^{th} Grade Students in Western New York State who Received a Tobacco Prevention Program Intervention during the 1998–1999 School Year. 

Survey Item: 
Baseline Survey (PreTest) (N = 1596) 
Evaluation Survey (Immediate PostTest) (N = 1438) 

%^{2} 
%^{2} 
pvalue 



Epidemiological Knowledge of Tobacco Use: 

(11) What percentage of kids your age (5^{th} graders) use tobacco every week .................... 
32.4 
75.5 
p < 0.0001 
(12) What percentage of high school students (9^{th} graders) use tobacco every week .............. 
26.3 
34.3 
p = 0.0129 
(13) What percentage of adults use tobacco every week ............................ 
4.4 
49.1 
p < 0.0001 


^{1}Proportions were compared at the School Level (N = 19), using WilcoxonMatched Pairs/Signed Rank Tests. P values were identified as significant if they were less than or equal to .05, thus rejecting the null hypothesis (that the Intervention had No Effect); n.s. = not significant. ^{2}Percentages shown are Medians, which summarize the distribution of correct responses by school. 

Mahoney et al. BMC Family Practice 2002 3:3 doi:10.1186/1471229633 