Survival analysis and prognostic factors associated with the timing of first forced sexual act among women in Kenya, Zimbabwe and Cote d‘Ivoire

Fagbamigbe, Adeniyi Francis; Abi, Roland; Akinwumi, T.; Ogunsuji, Oluwaseyi; Odigwe, A.; Olowolafe, Tubosun Alex

doi:10.1016/j.sciaf.2019.e00092

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…(Pat Karnofsky) performance score as rated by the patient, one unit increase in pat karnofsky, the associated risk towards the event of interest (death) is decreased by 1.2%. Weight loss in the last six months in (pounds) one pound increase in weight loss, the associated risk towards the event of interest (death) is decreased by 2.2%, the results are stable with the previous study of (Fagbamigbe et al, 2019;Györffy et al, 2010;Panjer, 1987).…”

Section: Discussionsupporting

confidence: 73%

Outlier and Time-Dependent Covariate in Survival Analysis, A Simulation Based Study

Ahmad,

Urooj

2023

iRASD J. Eco.

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The Cox regression model is widely used in Survival Analysis, also related to medical fields. The Cox regression model is further extended to tackle problems such as non-proportionality and time-dependent covariates. This paper focuses on the behavior of the Cox proportional hazard model in the presence of outliers and time-dependent covariates. To compare the performance of widely used existing time-to-event models in the presence of Outliers and time-dependent covariates and propose a modified Cox model in case of outliers and time-dependent covariates. The algorithm used in the Cox and time-dependent Cox model is extended to tackle the problem of outlier and time-dependent covariates jointly in a model. The estimated model's betas, RMSE, MAE, and MAPE, were compared among the different models. The study concluded that the modified Cox model outperformed the existing time-to-event methodology if the model simultaneously has an Outlier and time-dependent covariates problem.

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Section: Discussionsupporting

confidence: 73%

Outlier and Time-Dependent Covariate in Survival Analysis, A Simulation Based Study

Ahmad,

Urooj

2023

iRASD J. Eco.

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“…For the th child, let be the covariates. A standard CPH model can be applied using appropriate mathematical maximization procedures 39 , 40 in Eq. ( 1 ).…”

Section: Collinearitymentioning

confidence: 99%

Approximation of the Cox survival regression model by MCMC Bayesian Hierarchical Poisson modelling of factors associated with childhood mortality in Nigeria

Fagbamigbe

Salawu

Abatan

et al. 2021

Sci Rep

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The need for more pragmatic approaches to achieve sustainable development goal on childhood mortality reduction necessitated this study. Simultaneous study of the influence of where the children live and the censoring nature of children survival data is scarce. We identified the compositional and contextual factors associated with under-five (U5M) and infant (INM) mortality in Nigeria from 5 MCMC Bayesian hierarchical Poisson regression models as approximations of the Cox survival regression model. The 2018 DHS data of 33,924 under-five children were used. Life table techniques and the Mlwin 3.05 module for the analysis of hierarchical data were implemented in Stata Version 16. The overall INM rate (INMR) was 70 per 1000 livebirths compared with U5M rate (U5MR) of 131 per 1000 livebirth. The INMR was lowest in Ogun (17 per 1000 live births) and highest in Kaduna (106), Gombe (112) and Kebbi (116) while the lowest U5MR was found in Ogun (29) and highest in Jigawa (212) and Kebbi (248). The risks of INM and U5M were highest among children with none/low maternal education, multiple births, low birthweight, short birth interval, poorer households, when spouses decide on healthcare access, having a big problem getting to a healthcare facility, high community illiteracy level, and from states with a high proportion of the rural population in the fully adjusted model. Compared with the null model, 81% vs 13% and 59% vs 35% of the total variation in INM and U5M were explained by the state- and neighbourhood-level factors respectively. Infant- and under-five mortality in Nigeria is influenced by compositional and contextual factors. The Bayesian hierarchical Poisson regression model used in estimating the factors associated with childhood deaths in Nigeria fitted the survival data.

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“…Though it occurs in both developing and developed countries, it is more prevalent in developing countries [2,3]. Developing nations in Africa are faced with many developmental issues, including GBV, which is significantly aggravated by several factors such as age, education, residence, marital status, wealth index, religion, and occupation, with countries like Zimbabwe and Cote d'Ivoire at already crisis stages [4,5]. In Nigeria, several recent studies on GBV, with most of the focus on women, have revealed that GBV is still widespread in the country, with high prevalence in some of the papers reviewed [4][5][6][7][8].…”

Section: Gender-based Violencementioning

confidence: 99%

“…Developing nations in Africa are faced with many developmental issues, including GBV, which is significantly aggravated by several factors such as age, education, residence, marital status, wealth index, religion, and occupation, with countries like Zimbabwe and Cote d'Ivoire at already crisis stages [4,5]. In Nigeria, several recent studies on GBV, with most of the focus on women, have revealed that GBV is still widespread in the country, with high prevalence in some of the papers reviewed [4][5][6][7][8]. Through an internet-based literature search, very scanty evidence abounds on GBV among MSM and Transgender Female (TGF) in West Africa.…”

Section: Gender-based Violencementioning

confidence: 99%

The Prevalence of Sexual and Gender-based Violence among MSM and Transwomen in Nigeria

Morka¹

2022

TIJPH

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Sexual and gender-based violence (SGBV) against minority populations is a global public health problem with consequential effects on human health and development. It has been reported among men who have sex with men (MSM) and transwomen in forms of verbal abuse and physical and sexual violence. This study was carried out to determine the prevalence of SGBV among MSM and transwomen in Nigeria. It was cross-sectional in design utilizing a snowballing method to recruit participants. A total of 382 responses were received through an online questionnaire. Descriptive statistics and logistic regression were used to analyze the data at the significance level of 5%. The mean (SD) age of respondents was 27(0.3) years. About 35 % (95%CI: 30.2-39.8) of all respondents had ever experienced sexual violence, and 42.1 % (95%CI: 37.3-47.2) had ever experienced physical violence. The prevalence of sexual violence within one year preceding the study was 13.8% (95%CI: 10.8-17.5), while physical violence was 16.3% (95%CI: 13.0-20.2). Transwomen were about thrice (odds ratio: 2.92, p<0.01) and 5.6 times (p<0.001) more likely to experience sexual and physical violence respectively than MSM self-identified as males. Transwomen were also about 3 times more likely to experience IPV than MSM self-identified as males (odds ratio: 2.92, p<0.01). One-fifth (18.1%) of all respondents had ever experienced IPV, and for transwomen, it was 1 in 3. This study showed a high prevalence of both sexual and physical violence among MSM and transwomen in Nigeria, and this necessitate the creation of a legal framework that will protect their rights. Keywords: Gaymen, Gender-based violence, Men who have sex with men, Prevalence, Sexual violence, Transwomen.

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Survival analysis and prognostic factors associated with the timing of first forced sexual act among women in Kenya, Zimbabwe and Cote d‘Ivoire

Cited by 5 publications

References 40 publications

Outlier and Time-Dependent Covariate in Survival Analysis, A Simulation Based Study

Outlier and Time-Dependent Covariate in Survival Analysis, A Simulation Based Study

Approximation of the Cox survival regression model by MCMC Bayesian Hierarchical Poisson modelling of factors associated with childhood mortality in Nigeria

The Prevalence of Sexual and Gender-based Violence among MSM and Transwomen in Nigeria

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