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Table 2 CAS training and control groups total score for knowledge of the principles necessary for appraising evidence, attitude towards the use of evidence, perceived confidence and appraisal skill.

From: Critical appraisal skills training for health care professionals: a randomized controlled trial [ISRCTN46272378]

 

CAS training Mean (SD)

Control Mean (SD)

Intention to treat analysis Mean difference+ (95% CI)

Explanatory analysis Mean difference+ (95% CI)

Knowledge [range -18 to 18]

9.7 (5.3)

8.0 (5.1)

2.6 (0.6 to 4.6)*

3.2 (1.1 to 5.2)*

Attitude [range 7 to 35]

25.0 (3.8)

24.8 (4.0)

0.04 (-1.5 to 1.6)

-0.04 (-1.7 to 1.6)

Confidence [range 6 to 30]

15.0 (5.3)

13.8 (5.1)

1.4 (-0.5 to 3.3)

1.13 (-0.8 to 3.1)

Appraisal skill [all range 1 to 5]

   Methodology

2.4 (2.5)

2.0 (2.1)

0.6 (-0.8 to 1.9)

0.6 (-0.9 to 2.1)

   Results

2.6 (2.8)

1.7 (1.8)

1.2 (0.01 to 2.4)*

1.1 (-0.2 to 2.4)

   Relevance/Generalisability

2.7 (2.2)

2.4 (1.7)

0.3 (-0.8 to 1.4)

0.6 (-0.6 to 1.8)

  1. + Adjusted for sex, age, attendance at previous educational activity, access to medical library, prior experience of searching literature, formal education in research methods and/or epidemiology and or statistics, prior involvement in research
  2. * Statistically significant at P ≤ 0.05