Gareth Ambler, Rumana Z Omar, Patrick Royston
A comparison of imputation techniques for handling missing predictor values in a risk model with a binary outcome
Anne Whitehead, Rebecca M. Turner, Rumana Z. Omar, Simon G. Thompson
Meta-analyses using individual patient data are becoming increasingly common and have several advantages over meta-analyses of summary statistics. We explore the use of multilevel or hierarchical...
Quality research in healthcare: are researchers getting enough statistical support? (2006)
Omar, Rumana Z, McNally, Nick, Ambler, Gareth, Pollock, Allyson M
Abstract Background Reviews of peer-reviewed health studies have highlighted problems with their methodological quality. As published health studies form the basis of many clinical decisions...
Sullivan, Caoimhe O, Omar, Rumana Z, Forrest, Christopher B, Majeed, Azeem
Objectives. The purpose of this study was to investigate whether adjusting for clinical case mix and social class explains more of the variation in home visits between general practices than...
Goodwin, Peter C., Morrissey, Matthew C., Omar, Rumana Z., Brown, Michael, Southall, Kathleen, McAuliffe, Thomas B.
Full-text of this article is not available in this e-prints service. This article was originally published [following peer-review] in Physical Therapy, published by and copyright American Physical...
Goodwin, Peter C., Morrissey, Matthew C., Omar, Rumana Z., Brown, Michael, Southall, Kathleen, McAuliffe, Thomas B.
Full-text of this article is not available in this e-prints service. This article was originally published [following peer-review] in Physical Therapy, published by and copyright American Physical...
Meta-analysis of ordinal outcomes using individual patient data. (2001)
Whitehead, Anne, Higgins, Julian P. T., Omar, Rumana Z., Savaluny, Elly
Meta-analyses are being undertaken in an increasing diversity of diseases and conditions, some of which involve outcomes measured on an ordered categorical scale. We consider methodology for...
Quality research in healthcare: are researchers getting enough statistical support?
Omar, Rumana Z, McNally, Nick, Ambler, Gareth, Pollock, Allyson M
Case-mix and variation in specialist referrals in general practice
Sullivan, Caoimhe O, Omar, Rumana Z, Ambler, Gareth, Majeed, Azeem
Gray, Jeremy, Millett, Christopher, O'Sullivan, Caoimhe, Omar, Rumana Z, Majeed, Azeem
Objectives To determine the quality of diabetes management in primary care after the publication of the National Service Framework and examine the impact of age, gender and deprivation on the...
Quality research in healthcare: are researchers getting enough statistical support?
Omar, Rumana Z, McNally, Nick, Ambler, Gareth, Pollock, Allyson M
Case-mix and variation in specialist referrals in general practice
Sullivan, Caoimhe O, Omar, Rumana Z, Ambler, Gareth, Majeed, Azeem
Gray, Jeremy, Millett, Christopher, O'Sullivan, Caoimhe, Omar, Rumana Z, Majeed, Azeem
Objectives To determine the quality of diabetes management in primary care after the publication of the National Service Framework and examine the impact of age, gender and deprivation on the...
Omar, Rumana Z, O’Sullivan, Caoimhe, Petersen, Irene, Islam, Amir, Majeed, Azeem
Objective To examine whether patient level morbidity based measure of clinical case mix explains variations in prescribing in general practice.