Public Seminars

Global Disability Research Group Seminar Series

focusing on cross-disciplinary global disability research.
To join the mailing list for this seminar series please e-mail your details to Ellie Cole.

Global Health (IGH) Symposia

Members of the department contribute to IGH public meetings which bring together expertise on global health issues from all faculties within UCL.
Contact: Sarah Ball, Tel: (internal x82 72 2352)

2011 Seminar Series

Speaker: Dr Ngaire Coombs

Title: 'Compression of Morbidity and Socioeconomic Deprivation in New Zealand: Cross-sectional and Longitudinal Analyses of Hospital Utilisation and Mortality'

Date & Time: Friday 16th December  1pm-2pm

Venue: G37 & G38


The compression of morbidity hypothesis states that increases in life expectancy are outstripped by increases in the point at onset of morbidity prior to death, resulting in a decrease in morbidity at a population level. This work examines evidence for compression of morbidity in New Zealand, with reference to socioeconomic deprivation, sex, and age. Large administrative datasets on mortality and public hospital discharges in New Zealand between 1974 and 2006 were used in the analyses, but deprivation analyses were limited to 1991 onwards. Hospital bed days were used as a proxy for morbidity, after being filtered to improve consistency over time and remove cases not related to ill health. Both cross-sectional (period prevalence life tables) and longitudinal (reference point modelling) methods were employed.

Period prevalence life tables were used to calculate life expectancy and Hospital Utilisation Expectancy (HUE), which give the number of days while still surviving that an individual of a particular age can expect to spend in hospital. Reference point modelling uses linked mortality and hospital records to examine hospital utilisation in the months leading up to death, for decedents who died in the time period under observation.

Dr Ngaire Coombs is a research assistant at the Department of Epidemiology and Public Health at UCL. Current research areas include the relationship between sedentary behaviour (particularly TV and other screen time) and cardiometabolic health outcomes. Her PhD was in Demography/Social Statistics at the University of Southampton.

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