Ambler G - Search Results

1

The use of fractional polynomials to model continuous risk variables in epidemiology.

Royston P, Ambler G, Sauerbrei W. Royston P, et al. Among authors: ambler g. Int J Epidemiol. 1999 Oct;28(5):964-74. doi: 10.1093/ije/28.5.964. Int J Epidemiol. 1999. PMID: 10597998

2

Cardiovascular risk and diabetes. Are the methods of risk prediction satisfactory?

Stephens JW, Ambler G, Vallance P, Betteridge DJ, Humphries SE, Hurel SJ. Stephens JW, et al. Among authors: ambler g. Eur J Cardiovasc Prev Rehabil. 2004 Dec;11(6):521-8. doi: 10.1097/01.hjr.0000136418.47640.bc. Eur J Cardiovasc Prev Rehabil. 2004. PMID: 15580065

3

Generic, simple risk stratification model for heart valve surgery.

Ambler G, Omar RZ, Royston P, Kinsman R, Keogh BE, Taylor KM. Ambler G, et al. Circulation. 2005 Jul 12;112(2):224-31. doi: 10.1161/CIRCULATIONAHA.104.515049. Epub 2005 Jul 5. Circulation. 2005. PMID: 15998680

4

A comparison of imputation techniques for handling missing predictor values in a risk model with a binary outcome.

Ambler G, Omar RZ, Royston P. Ambler G, et al. Stat Methods Med Res. 2007 Jun;16(3):277-98. doi: 10.1177/0962280206074466. Stat Methods Med Res. 2007. PMID: 17621472

5

Iranian risk model as a predictive tool for retinopathy in patients with type 2 diabetes.

Azizi-Soleiman F, Heidari-Beni M, Ambler G, Omar R, Amini M, Hosseini SM. Azizi-Soleiman F, et al. Among authors: ambler g. Can J Diabetes. 2015 Oct;39(5):358-63. doi: 10.1016/j.jcjd.2015.01.290. Epub 2015 Mar 30. Can J Diabetes. 2015. PMID: 25837808

6

Non-linear models for the relation between cardiovascular risk factors and intake of wine, beer and spirits.

Ambler G, Royston P, Head J. Ambler G, et al. Stat Med. 2003 Feb 15;22(3):363-83. doi: 10.1002/sim.1359. Stat Med. 2003. PMID: 12529869

7

Validation of four different risk stratification systems in patients undergoing off-pump coronary artery bypass surgery: a UK multicentre analysis of 2223 patients.

Al-Ruzzeh S, Asimakopoulos G, Ambler G, Omar R, Hasan R, Fabri B, El-Gamel A, DeSouza A, Zamvar V, Griffin S, Keenan D, Trivedi U, Pullan M, Cale A, Cowen M, Taylor K, Amrani M. Al-Ruzzeh S, et al. Among authors: ambler g. Heart. 2003 Apr;89(4):432-5. doi: 10.1136/heart.89.4.432. Heart. 2003. PMID: 12639875 Free PMC article.

8

An evaluation of existing risk stratification models as a tool for comparison of surgical performances for coronary artery bypass grafting between institutions.

Asimakopoulos G, Al-Ruzzeh S, Ambler G, Omar RZ, Punjabi P, Amrani M, Taylor KM. Asimakopoulos G, et al. Among authors: ambler g. Eur J Cardiothorac Surg. 2003 Jun;23(6):935-41; discussion 941-2. doi: 10.1016/s1010-7940(03)00165-9. Eur J Cardiothorac Surg. 2003. PMID: 12829069

9

An evaluation of penalised survival methods for developing prognostic models with rare events.

Ambler G, Seaman S, Omar RZ. Ambler G, et al. Stat Med. 2012 May 20;31(11-12):1150-61. doi: 10.1002/sim.4371. Epub 2011 Oct 14. Stat Med. 2012. PMID: 21997569

10

How to develop a more accurate risk prediction model when there are few events.

Pavlou M, Ambler G, Seaman SR, Guttmann O, Elliott P, King M, Omar RZ. Pavlou M, et al. Among authors: ambler g. BMJ. 2015 Aug 11;351:h3868. doi: 10.1136/bmj.h3868. BMJ. 2015. PMID: 26264962 Free PMC article.

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