Survival Analysis on Undergraduate Students� Persistence- Case study

A longitudinal study on 1,998 undergraduate students in the four-year program was conducted in one of the universities in Kenya. These were students who had been admitted in the years 2012, 2013 and 2014. Data collected was for 64 months, from January 1, 2012 to May 27, 2017.Survival analysis was used to model and analyze the persistence of these students at the university. It was found that majority of the students who withdrew from the university did so in the first 12 months of study. There was a significant difference in the persistence of the male and female students, with the female students having a higher survival rate than the male students. It was also found that the persistence of the Kenyan and Non-Kenyan students was significantly different, with the Kenyan students having a higher survival rate than the Non-Kenyan students. Gender had a significant effect on the survival of these students with the risk of a male student withdrawing being 2 times higher than that of a female student

Development of a diarrhoea severity scoring scale in a passive health facility-based surveillance system

Background Diarrhoeal disease remains a leading cause of death among children mostly in low and middle- income countries. Factors contributing to disease severity are complex and there is currently no consensus on a scoring tool for use in community-based studies. Methods Data were collected during a passive surveillance system in an outpatient health facility in Lusaka, Zambia from March 2019 to July 2019. Diarrhea episodes were assessed for severity using an in-house severity scoring tool (CIDRZ) and previously published scores (Vesikari, Clark, CODA, and DHAKA). The CIDRZ score was constructed using fieldworker-reported clinical signs and exploratory factor analysis. We used precision-recall curves measuring severe diarrhoea (i.e., requiring intravenous rehydration or referred for hospital admission) to determine the best performing scores. Then, we used Cronbach's alpha to assess the scale's internal consistency. Finally, we used Cohen's kappa to assess agreement between the scores. Results Of 110 diarrhea episodes, 3 (3%) required intravenous rehydration or were referred for hospital admission. The precision-recall area under the curve of each score as a predictor of severe diarrhoea requiring intravenous rehydration or hospital admission was 0.26 for Vesikari, 0.18 for CODA, 0.24 for Clark, 0.59 for DHAKA, and 0.59 for CIDRZ. The CIDRZ scale had substantial reliability and performed similarly to the DHAKA score. Conclusions Diarrhoea severity scores focused on characteristics specific to dehydration status may better predict severe diarrhea among children in Lusaka. Aetiology-specific scoring tools may not be appropriate for use in community healthcare settings. Validation studies for the CIDRZ score in diverse settings and with larger sample sizes are warranted

Effects of Single and Integrated Water, Sanitation, Handwashing, and Nutrition Interventions on Child Soil-Transmitted Helminth and Giardia infections: A Cluster-Randomized Controlled Trial in Rural Kenya

Helminth and protozoan infections affect more than 1 billion children globally. Improving water quality, sanitation, handwashing, and nutrition could be more sustainable control strategies for parasite infections than mass drug administration, while providing other quality of life benefits

Lablab purpureus—A Crop Lost for Africa?

In recent years, so-called ‘lost crops’ have been appraised in a number of reviews, among them Lablab purpureus in the context of African vegetable species. This crop cannot truly be considered ‘lost’ because worldwide more than 150 common names are applied to it. Based on a comprehensive literature review, this paper aims to put forward four theses, (i) Lablab is one of the most diverse domesticated legume species and has multiple uses. Although its largest agro-morphological diversity occurs in South Asia, its origin appears to be Africa. (ii) Crop improvement in South Asia is based on limited genetic diversity. (iii) The restricted research and development performed in Africa focuses either on improving forage or soil properties mostly through one popular cultivar, Rongai, while the available diversity of lablab in Africa might be under threat of genetic erosion. (iv) Lablab is better adapted to drought than common beans (Phaseolus vulgaris) or cowpea (Vigna unguiculata), both of which have been preferred to lablab in African agricultural production systems. Lablab might offer comparable opportunities for African agriculture in the view of global change. Its wide potential for adaptation throughout eastern and southern Africa is shown with a GIS (geographic information systems) approach

Biophysical interactions in tropical agroforestry systems

sequential systems, simultaneous systems Abstract. The rate and extent to which biophysical resources are captured and utilized by the components of an agroforestry system are determined by the nature and intensity of interac-tions between the components. The net effect of these interactions is often determined by the influence of the tree component on the other component(s) and/or on the overall system, and is expressed in terms of such quantifiable responses as soil fertility changes, microclimate modification, resource (water, nutrients, and light) availability and utilization, pest and disease incidence, and allelopathy. The paper reviews such manifestations of biophysical interactions in major simultaneous (e.g., hedgerow intercropping and trees on croplands) and sequential (e.g., planted tree fallows) agroforestry systems. In hedgerow intercropping (HI), the hedge/crop interactions are dominated by soil fertility improvement and competition for growth resources. Higher crop yields in HI than in sole cropping are noted mostly in inherently fertile soils in humid and subhumid tropics, and are caused by large fertility improvement relative to the effects of competition. But, yield increases are rare in semiarid tropics and infertile acid soils because fertility improvement does not offse

Assessment of Occupational Safety Concerns in Pesticide Use Among Small-Scale Farmers in Sagana, Central Highlands, Kenya

Small-scale farmers in Sagana area of central Kenya constitute a population at risk due to intensive use of pesticides in the production of mainly horticultural crops for commercial purposes. This chapter examines the main causes of pesticide hazards and risks, barriers to taking risk reduction measures and cues to adopting safety behaviour when dealing with pesticides. Data were collected by the use of interviews conducted in 2006/2007 from a sample of 140 farmers. Perception scales were developed from interview items and were ranked along a modified three-point Likert scale. Analysis of the items and scales showed that farmers had fairly high levels of perceived risk, perceived severity and perceived benefits of taking action to mitigate pesticide hazards. Results from this study showed that farmers are still susceptible to pesticide-related dangers notably due to resignation to fate, perceived high cost of purchasing protective gear and lack of adequate training in the use and handling of pesticides. Further, contrary to conventional thinking, farmers’ education had limited positive effect to safety behaviour when handling pesticides. The challenge to policy and practice towards safe use of pesticides lies in issues of farmers’ economic survivability, perceptions and attitudes, along the whole chain from pesticide procurement, storage, farm application and disposal

Effect of organic and inorganic fertilisers on maize and traditional vegetable yields in Kisii Highlands

No Abstract Available E. Afr. Agric. For. J. 2003 69(1), 89-9