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BACKGROUND Urban slum populations in Africa continue to grow faster than national populations. Health strategies that focus on non-communicable diseases (NCD) in this segment of the population are generally lacking. We determined the prevalence of diabetes and associated cardiovascular disease (CVD) risk factors correlates in Kibera, Nairobi's largest slum.(More)
We explore in this paper to waht extent future implied volatility surfaces can be assigned by a trader without incurring the risk of model-independnt arbitrage. We give precise meaning to the concepts of floating and forward-propagated smile, and show under what condtions such smiles can be arbitrage free. We introduce a mechanism to produce future(More)
We present an extension of the LIBOR market model which allows for stochastic instantaneous volatilities of the forward rates in a displaced diffusion setting. We show that virtually all the powerful and important approximations that apply in the deterministic setting can be successfully and naturally extended to the stochastic volatility case. In(More)
BACKGROUND Urbanisation has been described as a key driver of the evolving non-communicable disease (NCD) epidemic. In Africa, hypertension is the commonest cardiovascular problem. We determined the prevalence and risk factor correlates of hypertension in the largest Nairobi slum. METHODS In 2010 we conducted a population-based household survey in Kibera,(More)
In this paper we show how to evolve a yield curve over time horizons of the order of years using a simple but e¤ective semiparametric method. The proposed technique preserves in the limit all the eigenvalues and eigenvectors of the observed changes in yields. It also recovers in a satisfactory way several important statistical features (unconditional(More)
We introduce two new methods to calculate bounds for zero-sum game options using Monte Carlo simulation. These extend and generalise the duality results of Haugh–Kogan/Rogers and Jamshidian to the case where both parties of a contract have Bermudan optionality. It is shown that the Andersen–Broadie method can still be used as a generic way to obtain bounds(More)
BACKGROUND Sleep disorders are common and associated with multiple metabolic and psychological derangements. Obstructive sleep apnoea (OSA) is among the most common sleep disorders and an inter-relationship between OSA, insulin resistance, obesity, type 2 diabetes (T2DM) and cardiovascular diseases has been established. Prevalence of sleep disorders in(More)
Dyna Indapamide SR. Each sustained release tablet contains 1,5 mg indapamide. Background: Facilities for Holter electrocardiography (ECG) monitoring in many Nigerian hospitals are limited. There are few published works in Nigeria on the use of 24-hour Holter ECG in cardiac arrhythmic evaluation of patients with cardio-vascular diseases. Objective: To study(More)
Peripheral public health facilities remain the most frequented by the majority of the population in Kenya; yet remain sub-optimally equipped and not optimized for non-communicable diseases care. We undertook a descriptive, cross sectional study among ambulatory type 2 diabetes mellitus clients, attending Kenyatta National Referral Hospital (KNH), and Thika(More)