Useful links

Randomisation services
Analysis of randomised trials
Reporting standards
Psychometrics
Statistical software
General links

Randomisation services

• Directory of randomisation software and services http://www-users.york.ac.uk/~mb55/guide/randsery.htm

• Clinical Trials Toolkit http://www.ct-toolkit.ac.uk

• Bristol Randomised Trials Collaboration  http://bristol.ac.uk/cobm/research/brtc.html

• Health Services Research Unit (Aberdeen) http://www.abdn.ac.uk/hsru

Analysis of randomised trials

General

• British Medical Journal Statistics Notes - http://www.tufts.edu/~gdallal/bmj.htm

Causal inference

• Jamie Robins' pages on causal inference (Harvard) - http://www.hsph.harvard.edu/faculty/james-robins/
  http://biosun1.harvard.edu/~robins/
  http://www.hsph.harvard.edu/causal/

• Structural Equation Modelling (Ed Rigdon) - http://www2.gsu.edu/~mkteer/

• Mediation (David Kenny) - http://davidakenny.net/cm/mediate.htm

• Manchester Biostatistics project on Design and methods of explanatory (causal) analysis for randomised trials of complex interventions in mental health with a focus on mediation.
  

Missing data

• James Carpenter's pages - http://missingdata.org.uk

• Joe Schafer's MI software - http://www.stat.psu.edu/~jls/misoftwa.html

• Van Buuren, Boshuizen and Knook's MICE - http://www.multiple-imputation.com/

• PEAS project page on imputation - www2.napier.ac.uk/depts/fhls/peas/imputation.asp

• Gary King's site including programs (e.g. AMELIA for imputation - not as good as ice) - http://gking.harvard.edu/

Multilevel Modelling

• Centre for Multilevel Modelling - http://www.cmm.bristol.ac.uk

Reporting standards

• In meta-analysis: QUOROM - www.consort-statement.org/QUORUM.pdf

• In observational studies: Strobe - http://www.strobe-statement.org/

• In randomised trials: CONSORT - http://www.consort-statement.org/

Psychometrics

• The Basics of Item Response Theory by Frank B. Baker, Second edition http://info.worldbank.org/etools/docs/library/117765/Item%20Response%20Theory%20-%20F%20Baker.pdf
  

• Applying item response theory modeling for evaluating questionnaire item and scale properties by Bryce B. Reeve and Peter Fayers http://www.oup.co.uk/pdf/0-19-852769-1.pdf

• National Cancer Institute : An Introduction to Modern Measurement Theory http://appliedresearch.cancer.gov/areas/cognitive/immt.pdf

• http://work.psych.uiuc.edu/irt/tutorial.asp

• http://www.ssicentral.com/irt/examples.html

• Stephen Miller's statistics help page psych.fullerton.edu/smiller/sindex1o.htm

In SAS

• Macros for Fitting Item Response Theory Models - www2.sas.com/proceedings/sugi30/204-30.pdf

• Using SAS PROC NLMIXED to fit item response theory models Sheu CF, Chen CT, Su YH, Wang WC. Behav Res Methods. 2005 May;37(2):202-18. http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=16171193&dopt=Abstract

• SAS macros for Rasch based latent variable modelling http://pubhealth.ku.dk/bs_en/lokale/rasch

and pdf's

• pubhealth.ku.dk/bs/publikationer/rr-03-13.pdf

• pubhealth.ku.dk/bs/publikationer/rr-03-12.pdf

• Latent class analysis and latent transition analysis in SAS [sorry, broken link] http://methcenter.psu.edu/index.php/component/content/231?task=view

• Performing Latent Class Analysis Using the CATMOD Procedure http://whitepapers.techrepublic.com.com/whitepaper.aspx?&docid=279721&promo=Data%20Mining%20-%20Analysis PROC LCA & PROC LTA Version 1.1.3 beta for SAS Version 9.1 for Windows. Registration required
  

Statistical software

• GLLAMM - http://www.gllamm.org

• Latent Gold - http://www.statisticalinnovations.com/products/latentgold_v4.html

• MPlus - http://www.statmodel.com

• Statistical Computing Resources - http://www.ats.ucla.edu/STAT/

General links

• MRC Clinical Trials Unit - http://www.ctu.mrc.ac.uk

• James Lind Library - http://www.jameslindlibrary.org

• Statistics Departments in the UK - http://www.ma.hw.ac.uk/stat/depts.html

• Statistics on the Web - http://my.execpc.com/~helberg/statistics.html

• Quantitative/Research Methods Resources (Psychology) http://psyphz.psych.wisc.edu/~shackman/mediation_moderation_resources.htm and http://www.griffith.edu.au/centre/gphrc/info-stats.html

• MDRC Research Intitative (Howard Bloom et al.) - http://www.mdrc.org/rsch_method.htm

• Prevention Science and Methodology Group (Hendricks Brown, Muthen et al) http:/psmg.usf.edu/