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Table 2 Comparison of the two research groups in terms of knowledge, attitude and behavior before and after intervention

From: Effectiveness of a health intervention based on WHO food safety manual in Iran

Variable Group MDa ± SD Bootstrapb
Bias P-Value 95% Confidence Interval
Lower Upper
knowledge Experimental 5.62 ± 6.02 −.03 .001 4.15 7.16
Control .24 ± 3.96 .01 .651 −.81 1.32
Attitude Experimental 6.03 ± 5.07 −.009 .001 4.84 7.38
Control .18 ± 3.58 .01 .745 −.82 1.21
Behavior Experimental 10.89 ± 10.16 −.08 .002 6.49 15.38
Control 6.44 ± 9.21 −.06 .034 3.12 10.32
  1. aMean score difference, bunless otherwise noted, bootstrap results are based on 1000 bootstrap samples