BackgroundThe vulnerability of clinical trials to volunteer bias is under-reported. Volunteer bias is systematic error due to differences between those who choose to participate...

International collaborations were considered when the paper involved different countries, 98 in total. The combination of countries according to economic groups considered...

Overall facility ranking by weighted quality scores.

Note: For alphabetic and alphanumeric+ sets, features with an underscore between pairs of words came from titles. For the indexing set, features mainly came from MeSH and...

Data are no. (%) of close contacts, unless otherwise indicated. Percentages may not total 100 because of rounding. Contact with well-appearing or sick/dead poultry was defined...

Note: All χ2 and F tests are significant at p<.01. Source: Virginia Commonwealth University Life Sciences Surveys, 2002–2010, N = 8,105. No survey was collected in 2009.

+ In each cell the upper figure is for all journals and the lower figure is for journals with at least 10 articles tested. * Ratio of successes to failures significantly...

Mandatory sex and gender questions.

Note. 95% UI: 95% uncertainty interval; aDue to lack of data, simultaneously pooled cocaine and amphetamine relative-risk estimates into an overall estimate for...

B-NMDS  =  Belgium Nursing Minimal Data Set, BMI  =  Body Mass Index, CCI  =  Charlson Comorbidity Index, CMG = Case Mix Group, CMI  =  Case Mix Index, DRG  =  Diagnose Resource...

*Results from chi-square tests of comparisons of means.

aTotal number of responses as multiple answers were possible for this question.

aModels in 1A contain 222 cases (111 diseases in 2002 and 2004).‡Models control for the 19 broad disease/disability categories listed in Figure 2 (including the 2 in the...

Evaluation of the risks of bias of RCTs included in the meta-analysis.

Classification of the states based on degree of age displacement for women in the DLHS-3 survey.

(All tendencies have a P-Value above 0.05/no significant tendency).

Journal based analysis of the OA-PMC articles. This file presents distribution of the articles as well as the publisher-annotated articles based on the journals in the OA-PMC...

*Retention rates for future years that have been estimated using year-to-year retention rates (Y2YRR) from the earlier data are shown in bold type. Estimated (by extrapolation)...

NA Not Applicable. *The study did not investigate this.1Gives results for trials with discrepancies for ≥1 primary outcome.2Results obtained from 248 of the completed studies.

Significant at p = 0.05, * Significant at p = 0.01; both Bonferroni corrected for n = 11.