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Hypothesis Test for Test of Independence

Hypothesis Test for Test of Independence

The test of independence is a chi-square-based test used to determine whether two variables or factors are independent or dependent. This hypothesis test is used to examine the independence of the variables. One can construct two qualitative survey questions or experiments based on the variables in a contingency table. The goal is to see if the two variables are unrelated (independent) or related (dependent). The null and alternative hypotheses for this test are:
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Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...

Introduction to Test of Independence

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In statistics, the term independence means that one can directly obtain the probability of any event involving both variables by multiplying their individual probabilities. Tests of independence are chi-square tests involving the use of a contingency table of observed (data) values.
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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder

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Association between Spinal Cord Injury and Alcohol Dependence: A Population-Based Retrospective Cohort Study.

Ching-Hui Chuang¹, Po-Cheng Chen², Chyi-Huey Bai³

¹Department of Nursing, Meiho University, Pingtung 912, Taiwan.

Journal of Personalized Medicine

|March 25, 2022

Summary

Spinal cord injury (SCI) survivors show a higher risk of developing alcohol dependence. Factors like male sex and comorbidities increase this risk, while older age may be protective.

Keywords:

National Health Insurance Research Database alcohol dependence spinal cord injury

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Area of Science:

Neurology
Addiction Medicine
Public Health

Background:

Spinal cord injury (SCI) significantly impacts patient rehabilitation and prognosis.
Alcohol abuse is a known barrier to effective SCI recovery.
Understanding the relationship between SCI and alcohol dependence is crucial for patient care.

Purpose of the Study:

To investigate the association between spinal cord injury (SCI) and the incidence of alcohol dependence syndrome.
To identify risk factors contributing to alcohol dependence in SCI patients.

Main Methods:

Utilized data from the National Health Insurance Research Database (NHIRD).
Compared incidence of alcohol dependence between SCI and non-SCI groups using propensity score matching.
Employed Cox proportional hazard regression to analyze risk factors and adjusted hazard ratios (HR).

Main Results:

SCI survivors exhibited a significantly higher hazard for alcohol dependence (adjusted HR: 1.39, p=0.0305).
Injury level did not influence the incidence of alcohol dependence.
Increased risk associated with male sex, lower insurance levels, higher comorbidities (Deyo's CCI), and psychiatric outpatient visits; older age showed a protective effect.

Conclusions:

Spinal cord injury is an independent risk factor for developing alcohol dependence syndrome.
Alcohol dependence incidence post-SCI is influenced by demographic, socioeconomic, and clinical factors.
Targeted interventions for at-risk populations following SCI are warranted.