Retrieval of diagnostic and treatment studies for clinical use through PubMed and PubMed's Clinical Queries filters

Cynthia Lokker; R Brian Haynes; Nancy L Wilczynski; K Ann McKibbon; Stephen D Walter

doi:10.1136/amiajnl-2011-000233

PMC full text:

J Am Med Inform Assoc. 2011 Sep-Oct; 18(5): 652–659.

Published online 2011 Jun 15. doi: 10.1136/amiajnl-2011-000233

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Table 1

Treatment question unadjusted mean values for satisfaction, number of relevant articles, proportion of relevant articles, number of articles retrieved, and the placement order of the first relevant article

Outcome measure	Search mode	Mean	SE	95% CI
Satisfaction^‡	CQ	4.5	0.267	4.01 to 5.08
	PM	4.3	0.268	3.76 to 4.83
	y-intercept	0.300	0.335	−0.371 to 0.971
No relevant (standard)^§	CQ	3.5	0.451	2.59 to 4.41
	PM	3.17	0.406	2.35 to 4.00
	y-intercept	−0.75	0.888	−2.56 to 1.06
No relevant (own)^¶	CQ	2.95	0.749	1.40 to 4.51
	PM	3.09	0.450	2.15 to 4.03
	(difference)	−0.136	0.691	−1.57 to 1.30
Proportion relevant^‡	CQ	0.33	0.039	0.246 to 0.404
	PM	0.25	0.033	0.182 to 0.312
	y-intercept	0.091	0.053	−0.014 to 0.197
No of retrievals^‡	CQ	14.4	0.958	12.5 to 16.3
	PM	17.0	0.811	15.4 to 18.6
	y-intercept	−1.8	1.42	−4.64 to 1.04
Order of first relevant article^‡	CQ	3.83	0.536	2.76 to 4.91
	PM	3.70	0.584	2.53 to 4.87
	y-intercept	−0.12	0.648	−1.42 to 1.18
No of retrievals in core journal subset (standard)^§	CQ	1.38	0.316	0.737 to 2.01
	PM	0.525	0.129	0.264 to 0.786
	y-intercept	0.850	0.357	0.127 to 1.57
No of retrievals in core journal subset (own)^¶	CQ	0.909	0.278	0.330 to 1.49
	PM	0.364	0.105	0.145 to 0.582
	(difference)	0.545	0.269	−0.014 to 1.11^*
No meeting methods criteria^‡	CQ	0.439	0.048	0.342 to 0.535
	PM	0.266	0.044	0.178 to 0.355
	y-intercept	0.180	0.089	0.001 to 0.359^†

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Analysis was performed on the difference between scores for (Clinical Queries (CQ) and PubMed (PM)) to account for participant effects and adjusted for question origin (standardized or participant's own). For variables analyzed by linear regression and ANOVA, the y-intercept represents the difference between clinical queries and PubMed; for those tested with paired t tests, the difference is the mean difference.

^*p=0.056.

^†p=0.049.

^‡Analyzed with linear regression with pooled standardized and own questions.

^§Analyzed with an ANOVA on standardized questions only, with question as an independent variable.

^¶Analyzed with a paired t test, since standard and participant questions could not be pooled as a result of a significant ‘question’ effect for standard questions.