Table 2.

Changes in mean scores from baseline to first assessment in three intervention arms. Values are mean differences (95% confidence intervals) unless stated otherwise^†

				P values
Scores	Pocket card group	Control group	InfoRetriever group	Between groups overall	Group A v B	Group B v C	Group A v C	For linear trend‡
Factor scores:
Personal application and current use of evidence based medicine	0.47 (0.31 to 0.63)	−0.07 (−0.25 to 0.10)	0.45 (0.29 to 0.61)	<0.001	<0.001***	<0.001***	0.84	<0.001
Future use of evidence based medicine	0.01 (−0.15 to 0.17)	−0.01 (−0.17 to 0.14)	0.03 (−0.15 to 0.22)	0.47	NA	NA	NA	NA
Individual item scores‡
Frequency of looking up evidence	−0.26 (−0.59 to 0.08)	−0.25 (−0.52 to 0.03)	0.56 (0.25 to 0.86)	0.012	0.70	0.0039*	0.032	<0.001
Frequency of raising role of current best evidence	0.32 (0.04 to 0.60)	0.15 (−0.16 to 0.45)	0.87 (0.56 to 1.18)	0.024	0.87	0.036	0.015*	0.001
Confidence in clinical decision making	0.09 (−0.13 to 0.30)	0.04 (−0.21 to 0.28)	0.30 (0.06 to 0.55)	0.60	NA	NA	NA	NA

Levels of significance after Bonferroni correction: ^*<0.017; ^**<0.003; ^***<0.0003.

NA=not available (>0.05 in between group comparison overall).

^†Control group versus pocket card group versus InfoRetriever group C during first rotation.

^‡Full questions in footnote to table 1.