Rahman, A., Reed, E., Underwood, M., Shipley, M. E., Omar, R. Z.
Objective. Chronic musculoskeletal pain is a very common and costly health problem. Patients presenting to rheumatology clinics with chronic pain can be difficult to manage. We studied 354 patients...
Ambler, G., Omar, R.Z., Royston, P.
Risk models that aim to predict the future course and outcome of disease processes are increasingly used in health research, and it is important that they are accurate and reliable. Most of these...
Turner, R.M., Omar, R.Z., Thompson, S.G.
In the cluster randomised study design, the data collected have a hierarchical structure and often include multivariate outcomes. We present a flexible modelling strategy that permits several...
Turner, R.M., Omar, R.Z., Thompson, S.G.
Studies in health research are commonly carried out in clustered settings, where the individual response data are correlated within clusters. Estimation and modelling of the extent of between-cluster...
Generic, simple risk stratification model for heart valve surgery (2005)
Ambler, G.A., Omar, R.Z., Royston, P., Kinsman, R., Keogh, B.E., Taylor, K.M.
Background— Heart valve surgery has an associated in-hospital mortality rate of 4% to 8%. This study aims to develop a simple risk model to predict the risk of in-hospital mortality for patients...
Generic, simple risk stratification model for heart valve surgery (2005)
Ambler, G., Omar, R.Z., Royston, P., Kinsman, R., Keogh, B.E., Taylor, K.M.
Background— Heart valve surgery has an associated in-hospital mortality rate of 4% to 8%. This study aims to develop a simple risk model to predict the risk of in-hospital mortality for patients...
Bayesian methods of analysis for cluster randomized trials with binary outcome data (2001)
Turner, R.M., Omar, R.Z., Thompson, S.G.
We explore the potential of Bayesian hierarchical modelling for the analysis of cluster randomized trials with binary outcome data, and apply the methods to a trial randomized by general practice. An...
Atri, J., Falshaw, M., Gregg, R., Robson, J., Omar, R. Z., Dixon, S.
OBJECTIVES: To determine whether a two hour training programme for general practice reception staff could improve uptake in patients who had failed to attend for breast screening, and whether women...
Cancer mortality and morbidity among workers at the Sellafield plant of British Nuclear Fuels.
Douglas, A. J., Omar, R. Z., Smith, P. G.
The mortality of all 14,282 workers employed at the Sellafield plant of British Nuclear Fuels between 1947 and 1975 was studied up to the end of 1988 and cancer incidence was examined from 1971 to...
Carpenter, L. M., Higgins, C. D., Douglas, A. J., Maconochie, N. E., Omar, R. Z., Fraser, P., ...
Cancer mortality in 40,761 employees of three UK nuclear industry facilities who had been monitored for external radiation exposure was examined according to whether they had also been monitored for...
Second malignancy in patients with Hodgkin's disease treated at the Royal Marsden Hospital.
Swerdlow, A. J., Barber, J. A., Horwich, A., Cunningham, D., Milan, S., Omar, R. Z.
Risk of second primary malignancy was assessed in follow-up to June 1991 of 1039 patients first treated for Hodgkin's disease at the Royal Marsden Hospital during 1963-91. A total of 77 second...
Omar, R Z, Barber, J A, Smith, P G
The mortality of all 14 319 workers employed at the Sellafield plant of British Nuclear Fuels between 1947 and 1975 was studied up to the end of 1992, and cancer incidence was examined from 1971 to...