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Differential Factors of Contraceptive Use and Adverse Outcomes of Pregnancy in Women with Ages 15 to 49 in Pretoria, South Africa
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作者 zeleke worku 《Journal of Data Analysis and Information Processing》 2014年第1期19-31,共13页
Challenges of teenage pregnancy and adverse outcomes of pregnancy constitute a major public health problem in South African women of the childbearing age of 15 to 49 years. This is a 6-year long study that was conduct... Challenges of teenage pregnancy and adverse outcomes of pregnancy constitute a major public health problem in South African women of the childbearing age of 15 to 49 years. This is a 6-year long study that was conducted in Pretoria, South Africa in order to identify factors that affect utilization of modern contraceptives and adverse pregnancy outcomes in women of the childbearing age of 15 to 49 years. Data analysis was conducted by using two-by-two Pearson’s chisquare tests of associations, binary logistic regression analysis, survival analysis, and multilevel analysis. The study showed that the percentage of women who regularly used modern family planning methods such as condoms, pills, injections, intra-uterine devices and sterilization was 41.74%. The average ages of women at first sex and pregnancy were 18.72 and 19.36 years respectively. Adverse outcomes of pregnancy occurred in 12.19% of women. Based on Odds Ratios (OR) estimated from binary logistic regression analysis, utilization of contraceptives was significantly influenced by easy access to family planning services, level of support from sexual partner, and young age at first pregnancy. Based on Hazard Ratios (HR) estimated from the Cox Proportional Hazards Model, the occurrence of adverse outcomes of pregnancy was significantly influenced by easy access to family planning services, unwanted pregnancy, and young age at first pregnancy. Women who experienced adverse outcomes of pregnancy were characterized by poor utilization of reproductive health and modern family planning services. There was a significant difference among the 20 health service delivery wards and 11 health service facilities in which reproductive health services were delivered to women with regards to the quality of service delivery. 展开更多
关键词 CONTRACEPTIVE Use ADVERSE Outcomes Odds RATIO HAZARD RATIO MULTILEVEL Analysis
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Analysis of Factors That Affect the Long-Term Survival of Small Businesses in Pretoria, South Africa
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作者 zeleke worku 《Journal of Data Analysis and Information Processing》 2013年第4期67-84,共18页
The paper is based on a 5-year follow-up study (2007 to 2012) of a random sample of 349 small business enterprises that operate in and around the city of Pretoria in South Africa. Data weregathered from each of the bu... The paper is based on a 5-year follow-up study (2007 to 2012) of a random sample of 349 small business enterprises that operate in and around the city of Pretoria in South Africa. Data weregathered from each of the businesses on socio economic factors that were known to affect the long-term survival of small businesses. The objective of the study was to identify and quantify key predictors of viability and long-term survival. Pearson’s chi-square tests of associations, binary logistic regression analysis and the Cox Proportional Hazards Model were used for screening of variables, and for estimating odds ratios and hazard ratios of key predictors of viability and long-term survival. The study found that 188 of the 349 businesses that took part in the study (54%) were not viable, and that the long-term survival and viability of small businesses were adversely affected by lack of entrepreneurial skills, lack of supervisory support to newly established businesses, and inability to operators running newly established businesses to acquire relevant vocational skills. 展开更多
关键词 Small BUSINESSES ENTREPRENEURIAL SKILLS VOCATIONAL SKILLS Odds RATIO HAZARD RATIO
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