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Table 9 Student t test of differences between groups at post-test

From: Randomised controlled trial of a theoretically grounded tailored intervention to diffuse evidence-based public health practice [ISRCTN23257060]

 

Intervention

Control

     
 

(N = 58

N = 61 unless otherwise stated)

 

Mean (SD)

Mean (SD)

Mean diff

95% CI

t

DF

P

Source knowledge

1.1 (0.6)

0.7 (0.5)

0.4

0.2–0.6

4.3

111.5

0.00

Concept knowledge

1.3 (0.4)

1.1 (0.4)

0.2

0.0–0.3

2.6

115.3

0.01

Attitudes

5.4 (0.8)

5.2 (0.7)

0.1

-0.2–0.4

0.9

115

0.37

 

(n = 56)

      

Decision-to-adopt

4.9 (1.2)

5.1 (0.9)

-0.2

-0.6–0.2

-0.9

97.8

0.35

Self-efficacy

4.0 (0.9)

3.9 (0.9)

0.1

-0.2–0.4

0.5

116.9

0.60

Job-satisfaction

4.3 (1.3)

4.0 (1.2)

0.3

-0.1–0.8

1.5

114.6

0.13

  1. Knowledge of sources: Mean of additive score of 0 = 'unknown', 1 = 'known, but not used', 2 = 'read', 3 = 'used in a public health decision-making situation'. Knowledge of concepts : Mean of additive score of 0 = 'unknown', 1 ='known', 2 = 'so known that I can explain to others' + an extra point (1) if correctly answering "Method chapter" as to what is the most important chapter for deciding scientific quality of an article. Attitudes: Likert scale: 1 = 'totally disagree', 2 = 'disagree', 3 = 'partly disagree', 4 = 'neither agree nor disagree', 5 = 'partly agree', 6 = 'agree', 7 = 'totally disagree'. Decision-to-adopt: Likert scale: 1 = 'totally incorrect', 2 = 'incorrect', 3 = 'Somewhat incorrect' 4 = 'neither right nor wrong', 5 = 'somewhat correct', 6 = 'correct', 7 = 'totally correct'. Job-satisfaction: Same Likert scale as attitudes.