Relationship Between Intimate Partner Violence and PTSD
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Added on 2020-04-29
Relationship Between Intimate Partner Violence and PTSD
Added on 2020-04-29
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The Relationship between Intimate Partner Violence and PTSD: An application of Coxregression with time varying covariatesContentsThe Relationship between Intimate Partner Violence and PTSD: An application of Cox regression withtime varying covariates................................................................................................................................11.1Introduction.................................................................................................................................11.2Data collection and research method...........................................................................................11.2.1Data collection.....................................................................................................................11.2.2Research methodology.........................................................................................................21.3Results and discussion.................................................................................................................31.4Results and discussion.................................................................................................................41.5Limitations of the study...............................................................................................................61.6Alternative methods.....................................................................................................................61.7References...................................................................................................................................8
1.1IntroductionThis research is aimed to critically appraise the statistical method used in the selected paper andsuggest the alternative analysis if there are any which can be performed. The current reviewpaper has been organized in four different parts. The first is devoted to explain the data andresearch method used in the study. In the second section the results from the selected paper hasbeen reviewed followed by the major limitation of the paper in the third section. Finally in thefourth section the alternative analysis method has been discussed. 1.2Data collection and research method1.2.1Data collection For the study, the researcher has picked up random sample of 211 Japanese women who wereborn in United States. Also the Japanese women who migrated from Japan to United State werealso included in the data set. In the sample respondents in the age group 18 to 49 were included.This is the appropriate age group for the analysis, as the women younger than 198 years andmore than 49 years are not expected to face partner violence, except in some cases. Also theauthor argued that the upper age limit was fixed as the systems of posttraumatic may be differentfor old females. So, the 211 samples were finally selected after the survey & personal interview.The survey was initially sent out to 407 households, but only few households haveresponded(Yoshihama & Horrock 2003). The problem with the data collection in this research paper is that only a certain ethnic group hasbeen selected. The sampling was done on one strata which is Japanese American women. Since,the intimate partner for the samples here could be highly different. Most of the cases it would bea partner from the same ethnic group but few cases may be where the partner is from other ethnicgroup. So, the way this relationship exists might be little biased in the population. So, it would bedifficult to generalize the results from the current study(Teddlie & Yu 2007; Daniel 2011).Also, the survey has 52% response rate and the women with higher age were the group who hasmostly not responded. Response rate could be been increased by offering some rewards in theform of money, gifts or some other form. But this leads to biasness in the surveys. In this case,the participants were given $20 each. Also the research should have focused on increasing the
sample size by distributing the questionnaire to more people. The results are considered to berobust if the sample size is large. Also the results from the analysis can be generalized in case oflarge sample size. Furthermore, the dependent variable is a dichotomous variable, which flag the respondentwhether they have experienced PSTD in their lifetime. In other words the dependent variablewill take only the value 1 or 0(George et al. 2014). Also, the time at which they experienced forthe first time has been updated for each respondent. Since the researcher is using survivalanalysis to find out the time the event occurs first, the selection of age group is very critical.Most of the data would be censored since the respondents are yet to experience this kind ofevent. Inclusion of people at less age might leads to more observations with censored data. Onemajor challenge with the data would be to get accurate time of event for each respondent. Since,the data has been collected at one point time rather than observing over the period of time, itmight affect the results. 1.2.2Research methodology Since the nature of the study is to understand the time taken for any event (in this case PSTD) tohappen, the researcher have used survival analysis which is one of the most appropriatetechniques for this kind of analysis. One of most important task in survival analysis is correctlyidentify the population and collect relevant data. There are 3 possibilities in terms ofdata(Cierniak & Reimann 2011; Mangal & Mangal 2013). Firstly, group of observations where the event has occurred within the period of examination. Inthis case it is between 18-49 years. Secondly, possibility would be that the respondent is droppedfrom the study within this period. Last possibility would be the observations where the event didnot occurred within the range of study which is basically the censored observations.
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