Harriet Forbes

I did an undergraduate degree in Human Sciences, followed by a Masters in Epidemiology at LSHTM.  Prior to working at the School, I was a Research Assistant at the Kings Centre for Military Health Research, exploring the mental health of military personnel returning from Iraq and Afghanistan. I then joined the School in 2011. I have experience working with large datasets, namely the CPRD and HES. I am currently working on my PhD looking at risk factors for zoster and postherpetic neuralgia, using UK electronic healthcare records. This is supervised by Sinead Langan and Krishnan Bhaskaran.  I also work with Liam Smeeth, Sara Thomas and Tim Clayton.

Contact details

Related Publications

Quantification of risk factors for postherpetic neuralgia in a cohort of herpes zoster patients

Forbes, H. Bhaskaran, K. Thomas, S. Smeeth, L. Clayton, T. Mansfield, K. Minassian, C. Langan, S.
Neurology, 2016; pii: 10.1212/WNL.0000000000002808.

A systematic review and meta-analysis of risk factors for postherpetic neuralgia.

Forbes, HJ. Thomas, SL. Smeeth, L. Clayton, T. Farmer, R. Bhaskaran, K. Langan, SM. 
Pain, 2016, Jan;157(1):30-54.

Data Resource Profile: Clinical Practice Research Datalink (CPRD).

Herrett, E. Gallagher, AM. Bhaskaran, K. Forbes, H. Mathur, R. van Staa, T. Smeeth, L.
Int J Epidemiol, 2015;44(3):827-36.

Statin use and the risk of herpes zoster: a nested case-control study using primary care data from the UK Clinical Research Practice Datalink.

Matthews, A. ; Turkson, M. ; Forbes, H. ; Langan, S.M. ; Smeeth, L. ; Bhaskaran, K. ;
Statin use and the risk of herpes zoster: a nested case-control study using primary care data from the UK Clinical Research Practice Datalink.
Br J Dermatol, 2016;

Quantification of risk factors for postherpetic neuralgia in herpes zoster patients: A cohort study.

Forbes, H.J. ; Bhaskaran, K. ; Thomas, S.L. ; Smeeth, L. ; Clayton, T. ; Mansfield, K. ; Minassian, C. ; Langan, S.M. ;
Quantification of risk factors for postherpetic neuralgia in herpes zoster patients: A cohort study.
Neurology, 2016;

Quantification of risk factors for herpes zoster: population based case-control study.

Forbes HJ, Bhaskaran K, Thomas SL, Smeeth L, Clayton T, Langan SM.


Codelists available
Metformin and cancer in type 2 diabetes: a systematic review and comprehensive bias evaluation.

Farmer, R.E. ; Ford, D. ; Forbes, H.J. ; Chaturvedi, N. ; Kaplan, R. ; Smeeth, L. ; Bhaskaran, K. ;
Metformin and cancer in type 2 diabetes: a systematic review and comprehensive bias evaluation.
Int J Epidemiol, 2016;

Partner Bereavement and Risk of Herpes Zoster: Results from Two Population-Based Case-Control Studies in Denmark and the United Kingdom.

Schmidt, S.A. ; Vestergaard, M. ; Pedersen, H.S. ; Schønheyder, H.C. ; Thomas, S.L. ; Smeeth, L. ; Mansfield, K.E. ; Sørensen, H.T. ; Forbes, H.J. ; Langan, S.M. ;
Partner Bereavement and Risk of Herpes Zoster: Results from Two Population-Based Case-Control Studies in Denmark and the United Kingdom.
Clin Infect Dis, 2016;

The association between human herpesvirus infections and stroke: a systematic review protocol.

Forbes, H.J. ; Benjamin, L. ; Breuer, J. ; Brown, M.M. ; Langan, S.M. ; Minassian, C. ; Smeeth, L. ; Thomas, S.L. ; Warren-Gash, C. ;
The association between human herpesvirus infections and stroke: a systematic review protocol.
BMJ Open, 2017; 7(5):e016427

Association between human herpesvirus infections and dementia or mild cognitive impairment: a systematic review protocol.

Warren-Gash, C. ; Forbes, H. ; Breuer, J. ; Hayward, A.C. ; Mavrodaris, A. ; Ridha, B.H. ; Rossor, M. ; Thomas, S.L. ; Smeeth, L. ;
Association between human herpesvirus infections and dementia or mild cognitive impairment: a systematic review protocol.
BMJ Open, 2017; 7(6):e016522

Herpes zoster risk after 21 specific cancers: population-based case-control study.

Hansson, E. ; Forbes, H.J. ; Langan, S.M. ; Smeeth, L. ; Bhaskaran, K. ;
Herpes zoster risk after 21 specific cancers: population-based case-control study.
Br J Cancer, 2017; 116(12):1643-1651

Varicella and herpes zoster vaccine development: lessons learned.

Warren-Gash, C. ; Forbes, H. ; Breuer, J. ;
Varicella and herpes zoster vaccine development: lessons learned.
Expert Rev Vaccines, 2017;

Inequalities in zoster disease burden: a population-based cohort study to identify social determinants using linked data from the UK Clinical Practice Research Datalink.

Jain, A. ; van Hoek, A.J. ; Walker, J.L. ; Forbes, H.J. ; Langan, S.M. ; Root, A. ; Smeeth, L. ; Thomas, S.L. ;
Inequalities in zoster disease burden: a population-based cohort study to identify social determinants using linked data from the UK Clinical Practice Research Datalink.
Br J Dermatol, 2018;

Viral load and antibody boosting following herpes zoster diagnosis.

Warren-Gash, C. ; Forbes, H. ; Maple, P. ; Quinlivan, M. ; Breuer, J. ;
Viral load and antibody boosting following herpes zoster diagnosis.
J Clin Virol, 2018; 103:12-15

Effectiveness of herpes zoster vaccination in an older United Kingdom population.

Walker, J.L. ; Andrews, N.J. ; Amirthalingam, G. ; Forbes, H. ; Langan, S.M. ; Thomas, S.L. ;
Effectiveness of herpes zoster vaccination in an older United Kingdom population.
Vaccine, 2018;

Severe and predominantly active atopic eczema in adulthood and long term risk of cardiovascular disease: population based cohort study.

Silverwood, R.J. ; Forbes, H.J. ; Abuabara, K. ; Ascott, A. ; Schmidt, M. ; Schmidt, S.A.J. ; Smeeth, L. ; Langan, S.M. ;
Severe and predominantly active atopic eczema in adulthood and long term risk of cardiovascular disease: population based cohort study.
BMJ, 2018; 361:k1786

Nitrous oxide and long-term morbidity and mortality in the ENIGMA trial.

Leslie, K. ; Myles, P.S. ; Chan, M.T. ; Forbes, A. ; Paech, M.J. ; Peyton, P. ; Silbert, B.S. ; Williamson, E. ;
Nitrous oxide and long-term morbidity and mortality in the ENIGMA trial.
Anesth Analg, 2011; 112(2):387-93

Nitrous oxide and serious morbidity and mortality in the POISE trial.

Leslie, K. ; Myles, P. ; Devereaux, P.J. ; Forbes, A. ; Rao-Melancini, P. ; Williamson, E. ; Xu, S. ; Foex, P. ; Pogue, J. ; Arrieta, M. ; Bryson, G.L. ; Paul, J. ; Paech, M.J. ; Merchant, R.N. ; Choi, P.T. ; Badner, N. ; Peyton, P. ; Sear, J.W. ; Yang, H. ;
Nitrous oxide and serious morbidity and mortality in the POISE trial.
Anesth Analg, 2013; 116(5):1034-40

Lateral wedge insoles for medial knee osteoarthritis: 12 month randomised controlled trial.

Bennell, K.L. ; Bowles, K.A. ; Payne, C. ; Cicuttini, F. ; Williamson, E. ; Forbes, A. ; Hanna, F. ; Davies-Tuck, M. ; Harris, A. ; Hinman, R.S. ;
Lateral wedge insoles for medial knee osteoarthritis: 12 month randomised controlled trial.
BMJ, 2011; 342:d2912

Confounder-adjusted estimates of the risk difference using propensity score-based weighting.

Ukoumunne, O.C. ; Williamson, E. ; Forbes, A.B. ; Gulliford, M.C. ; Carlin, J.B. ;
Confounder-adjusted estimates of the risk difference using propensity score-based weighting.
Stat Med, 2010; 29(30):3126-36

Doubly robust estimators of causal exposure effects with missing data in the outcome, exposure or a confounder.

Williamson, E.J. ; Forbes, A. ; Wolfe, R. ;
Doubly robust estimators of causal exposure effects with missing data in the outcome, exposure or a confounder.
Stat Med, 2012; 31(30):4382-400

Variance reduction in randomised trials by inverse probability weighting using the propensity score.

Williamson, E.J. ; Forbes, A. ; White, I.R. ;
Variance reduction in randomised trials by inverse probability weighting using the propensity score.
Stat Med, 2014; 33(5):721-37

Introduction to propensity scores.

Williamson, E.J. ; Forbes, A. ;
Introduction to propensity scores.
Respirology, 2014; 19(5):625-35

Introduction to causal diagrams for confounder selection.

Williamson, E.J. ; Aitken, Z. ; Lawrie, J. ; Dharmage, S.C. ; Burgess, J.A. ; Forbes, A.B. ;
Introduction to causal diagrams for confounder selection.
Respirology, 2014; 19(3):303-11