Guidance on use of IPD

Useful reading material relevant to undertaking IPD meta-analyses
Tierney JF, Stewart LA, Clarke M. Chapter 26Individual participant data. In: Higgins JPT, Thomas J, Chandler J, Cumpston M, Li T, Page MJ, Welch VA (editors). Cochrane Handbook for Systematic Reviews of Interventions version 6.1 (updated September 2020). Cochrane, 2020. Available from 
Meta-analysis of individual participant data: rationale, conduct, and reporting. Riley RD et al. BMJ 2010. (PMID: 20139215)
Individual patient data meta-analyses Clarke MJ. Best Pract Res Clin Obstet Gynaecol 2005. (PMID: 15749065)
To IPD or not to IPD? Advantages and disadvantages of systematic reviews using individual patient data. Stewart, LA et al. Eval Health Prof 2002. (PMID: 11868447)
Individual patient data meta-analysis of randomised anti-epileptic drug
monotherapy trials. Williamson PR, Marson AG, Tudur C, Hutton JL and Chadwick D. Journal of Evaluation in Clinical Practice 2000. (PMID: 10970014)
Chapter 6: Obtaining individual patient data from randomised controlled trials. Clarke MJ, Stewart LA. In: Matthias Egger, George Davey Smith, Douglas Altman (editors), Systematic Reviews in Health Care: Meta-analysis in Context. BMJ Books, London 2001. (Link to website)

Individual patient data meta-analyses in cancer. Clarke, M et al. Brit J Cancer 1998. (PMID: 9667689)
Meta-analyses using individual patient data. Clarke MJ, Stewart LA. J Eval Clin Pract 1997. (PMID: 9406108)
Practical methodology of meta-analyses (overviews) using updated individual patient data. Cochrane Working Group. Stewart LA et al. Stats Med 1995. (PMID: 8552887)
Systematic reviews of randomized controlled trials: the need for complete data. Clarke MJ, Stewart LA. J Eval Clin Pract 1995. (PMID: 9238566)
Obtaining data from randomised controlled trials: how much do we need for reliable and informative meta-analyses? Clarke MJ, Stewart LA.  BMJ 1994. (PMID: 7950694)