Multiple Imputation and Random Forests (MIRF) for unobservable, high-dimensional data

Bareng A.S. Nonyane, Andrea S. Foulkes

Research output: Contribution to journalArticlepeer-review


Understanding the genetic underpinnings to complex diseases requires consideration of sophisticated analytical methods designed to uncover intricate associations across multiple predictor variables. At the same time, knowledge of whether single nucleotide polymorphisms within a gene are on the same (in cis) or on different (in trans) chromosomal copies, may provide crucial information about measures of disease progression. In association studies of unrelated individuals, allelic phase is generally unobservable, generating an additional analytical challenge. In this manuscript, we describe a novel approach that combines multiple imputation and random forests for this high-dimensional, unobservable data setting. An application to a cohort of IHV-1 infected individuals receiving anti-retroviral therapies is presented. A simulation study is also presented to characterize method performance.

Original languageEnglish (US)
Article number12
JournalInternational Journal of Biostatistics
Issue number1
StatePublished - 2007
Externally publishedYes


  • Genotype
  • HIV-1
  • Haplotype
  • Lipids
  • Phase
  • Random forests
  • Recursive partitioning

ASJC Scopus subject areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty


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