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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