Application of linear discriminant analysis to the biochemical and haematological differentiation of opiate addicts from healthy subjects: a case–control study

Objective : Biochemical and haematological parameters of nutritional interest were determined in the serum of opiate addicts in order to compare them with those obtained in healthy subjects. Linear discriminant analysis was applied for the differentiation of the opiate addicts. Subjects : Sera of 10...

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Veröffentlicht in:European journal of clinical nutrition 2004-03, Vol.58 (3), p.449-455
Hauptverfasser: Hernandez Calzadilla, C, Rodriguez Rodriguez, E M, Diaz-Flores Estevez, F, Diaz-Flores Estevez, J F, Diaz Romero, C, Serra-Majem, L
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container_issue 3
container_start_page 449
container_title European journal of clinical nutrition
container_volume 58
creator Hernandez Calzadilla, C
Rodriguez Rodriguez, E M
Diaz-Flores Estevez, F
Diaz-Flores Estevez, J F
Diaz Romero, C
Serra-Majem, L
description Objective : Biochemical and haematological parameters of nutritional interest were determined in the serum of opiate addicts in order to compare them with those obtained in healthy subjects. Linear discriminant analysis was applied for the differentiation of the opiate addicts. Subjects : Sera of 106 opiate addicts in detoxification treatment ( n =19) or in Methadone Maintenance Treatment Program (MMTP) ( n =87) were studied. Design : The determination of classical biochemical and haematological parameters in blood samples was carried out using standardized methods. Determination of retinol and α -tocopherol was carried out by high-performance liquid chromatography with diode-array detector. Folic acid and vitamin B 12 were determined using competitive binding techniques. Minerals were determined by flame emission spectrometry (Na and K) and atomic absorption spectrometry with air–acetylene flame (Ca, Mg, Fe, Cu and Zn) or with hydride generation (Se). Phosphorous was determined using a colorimetric method with ammonium molibdate. All statistical analyses were performed by means of the SPSS version 10.0 software for Windows. Results : Stepwise linear discriminant analysis simplified the system to the following variables: Na, K, Mg, number of leucocytes, triglycerides, GPT, glucose, albumin, retinol and folic acid; and 90.1% (86.4% after crossvalidation) of correct classification was obtained. Representing the first and second discriminant functions, the control groups were well separated from opiate addicts. Conclusions : Applying linear discriminant analysis on several biochemical and haematological parameters, the opiate addicts could clearly be differentiated from the control individuals, and a tendency to differentiate the opiate addicts in MMTP and in detoxification treatment was observed.
doi_str_mv 10.1038/sj.ejcn.1601827
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Linear discriminant analysis was applied for the differentiation of the opiate addicts. Subjects : Sera of 106 opiate addicts in detoxification treatment ( n =19) or in Methadone Maintenance Treatment Program (MMTP) ( n =87) were studied. Design : The determination of classical biochemical and haematological parameters in blood samples was carried out using standardized methods. Determination of retinol and α -tocopherol was carried out by high-performance liquid chromatography with diode-array detector. Folic acid and vitamin B 12 were determined using competitive binding techniques. Minerals were determined by flame emission spectrometry (Na and K) and atomic absorption spectrometry with air–acetylene flame (Ca, Mg, Fe, Cu and Zn) or with hydride generation (Se). Phosphorous was determined using a colorimetric method with ammonium molibdate. All statistical analyses were performed by means of the SPSS version 10.0 software for Windows. 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Linear discriminant analysis was applied for the differentiation of the opiate addicts. Subjects : Sera of 106 opiate addicts in detoxification treatment ( n =19) or in Methadone Maintenance Treatment Program (MMTP) ( n =87) were studied. Design : The determination of classical biochemical and haematological parameters in blood samples was carried out using standardized methods. Determination of retinol and α -tocopherol was carried out by high-performance liquid chromatography with diode-array detector. Folic acid and vitamin B 12 were determined using competitive binding techniques. Minerals were determined by flame emission spectrometry (Na and K) and atomic absorption spectrometry with air–acetylene flame (Ca, Mg, Fe, Cu and Zn) or with hydride generation (Se). Phosphorous was determined using a colorimetric method with ammonium molibdate. All statistical analyses were performed by means of the SPSS version 10.0 software for Windows. Results : Stepwise linear discriminant analysis simplified the system to the following variables: Na, K, Mg, number of leucocytes, triglycerides, GPT, glucose, albumin, retinol and folic acid; and 90.1% (86.4% after crossvalidation) of correct classification was obtained. Representing the first and second discriminant functions, the control groups were well separated from opiate addicts. Conclusions : Applying linear discriminant analysis on several biochemical and haematological parameters, the opiate addicts could clearly be differentiated from the control individuals, and a tendency to differentiate the opiate addicts in MMTP and in detoxification treatment was observed.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>14985682</pmid><doi>10.1038/sj.ejcn.1601827</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Absorption
Acetylene
Addicts
Adult
Albumins
alpha-Tocopherol - analysis
alpha-Tocopherol - blood
Ammonium
Ascorbic Acid - analysis
Ascorbic Acid - blood
Atomic absorption spectroscopy
Biochemistry
Biological and medical sciences
Blood
Case-Control Studies
Clinical Nutrition
Colorimetry
Detoxification
Differentiation
Discriminant Analysis
Drug abuse
Drug addictions
Drug overdose
Emissions
Epidemiology
Female
Folic acid
Health Status
Hematologic Tests
Hematology
High performance liquid chromatography
Humans
Internal Medicine
Leukocytes
Liquid chromatography
Magnesium
Male
Medical sciences
Medicine
Medicine & Public Health
Metabolic Diseases
Methadone
Methadone - therapeutic use
Middle Aged
Minerals
Minerals - analysis
Minerals - blood
Narcotics
Nutrition
Opioid-Related Disorders - blood
original-communication
Parameters
Public Health
Scientific imaging
Spectral analysis
Spectrometry
Spectroscopy
Statistical analysis
Statistical methods
Substance abuse treatment
Tocopherol
Toxicology
Triglycerides
Vitamin A
Vitamin A - blood
Vitamin B 12 - analysis
Vitamin B 12 - blood
Vitamin B12
Vitamins - analysis
Vitamins - blood
title Application of linear discriminant analysis to the biochemical and haematological differentiation of opiate addicts from healthy subjects: a case–control study
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