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Mohamad Reza Pahlevi
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MODEL REGRESI COX STRATIFIED PADA DATA KETAHANAN Mohamad Reza Pahlevi; Mustafid Mustafid; Triastuti Wuryandari
Jurnal Gaussian Vol 5, No 3 (2016): Jurnal Gaussian
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (559.772 KB) | DOI: 10.14710/j.gauss.v5i3.14701

Abstract

Stratified Cox model on the events are not identical is a modification of the Cox Proportional Hazard models when there are individuals who experienced more than one incident. This study aims to form a stratified Cox regression models for repeated occurrences of data are not identical and their application to cases of hemorrhagic stroke disease recurrence and to determine the factors that affect the case. Parameter Estimation in Stratified Cox models using Partial Maximum Likelihood Estimation (MPLE). Stratified Cox model building procedure consists of six stages: (1) identification data, which specify the variables that will be used in the Cox models. (2) Estimated Cox Proportional Hazard model parameters. (3) The test parameters for each variable using the Wald test. (4) Testing Proportional Hazard assumptions. (5) stratification variables. (6) Interpretation Stratified Cox models. This study uses data of patients who experienced a hemorrhagic stroke unspecified with 7 independent variables such as age, sex, blood pressure, blood sugar, triglycerides, cholesterol and replications. Based on the testing parameters obtained three variables that influence such as age, cholesterol levels and repeat. Furthermore, in assuming Proportional Hazard showed that replicates variable Proportional Hazard did not meet the assumptions that need to be stratified. Unspecified hemorrhagic stroke patients aged over 50 years admitted to 3.230 times longer than the patients were under 50 years old. Unspecified hemorrhagic stroke patients with high cholesterol levels are treated 0.182 times faster than patients with normal cholesterol levels. Keywords: Stratified Cox, Cox Proportional Hazard, MPLE, Haemorrhagic Stroke, Recurrent Events
Examining Factors Affecting the Food Expenditure in Indonesia Mohamad Reza Pahlevi; Dara Yuri Andita; Edwin Gumilar; Febrianti Nursafitri; Sarah Safira Sofiani
Prosiding Industrial Research Workshop and National Seminar Vol 9 (2018): Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (851.361 KB) | DOI: 10.35313/irwns.v9i0.1090

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The aim of this study is to analyze the effect of Gross Regional Domestic Product, Human Development Index,and the number of family members on the food expenditure in Indonesia. Due to its important role for the familyas well as the community as a whole, managing food expenditure is very important. The management of foodexpenditure is very important. If the main priority of the Indonesian towards food is very high compared to theexpenditures on other things such as travel, saving, or education, it is feared that the quality of their humanresources tend to decline. Thus this research is important. The research explores the three factors from a samplepopulation of 34 provinces in Indonesia in 2015. The causal research was employed and the cross-sectionalmethod was used in this research to gather the data. Also, this research using secondary data from the CentralBureau of Statistics of Indonesia. The result of statistical analysis applying multiple regression shows that theGross Regional Domestic Product has a positive influence on Food Expenditure. In contrast, the other factors suchas the Human Development Index and the number of family members have no significant effect on foodexpenditure.The aim of this study is to analyze the effect of Gross Regional Domestic Product, Human Development Index,and the number of family members on the food expenditure in Indonesia. Due to its important role for the familyas well as the community as a whole, managing food expenditure is very important. The management of foodexpenditure is very important. If the main priority of the Indonesian towards food is very high compared to theexpenditures on other things such as travel, saving, or education, it is feared that the quality of their humanresources tend to decline. Thus this research is important. The research explores the three factors from a samplepopulation of 34 provinces in Indonesia in 2015. The causal research was employed and the cross-sectionalmethod was used in this research to gather the data. Also, this research using secondary data from the CentralBureau of Statistics of Indonesia. The result of statistical analysis applying multiple regression shows that theGross Regional Domestic Product has a positive influence on Food Expenditure. In contrast, the other factors suchas the Human Development Index and the number of family members have no significant effect on foodexpenditure.
Co-Authors Dara Yuri Andita Edwin Gumilar Febrianti Nursafitri Mustafid Mustafid Sarah Safira Sofiani Triastuti Wuryandari