[Diagnostic value of carbohydrate-deficient transferrin, gamma-glutamyltransferase and mean erythrocyte volume as laboratory markers of chronic alcohol abuse].
BACKGROUND
Our research aimed at finding out values of carbohydrate-deficient transferin (CDT), gamma-glutamyltransferase (GGT) and mean corpuscular volume (MCV) for the purposes of future etiological diagnostics of alcohol neuropathy in thin fibres.


METHODS
We examined the serum of 80 control subjects (50 women and 30 men), and the serum of 33 alcoholics (20 men and 13 women) with the daily consumption of more than 60 g alcohol in the course of the last four weeks. CDT was determined with the use of microcolumn separation after iron saturation followed by turbidimetric immunoassay (ChronoAlcoI. D., Sangui Biotech, Inc.) on Cobas-Mira analyser. CDT is expressed as a percentage of the total transferin. Senzitivity, specificity, positive likelihood ration (+LR), ROC and the area under the ROC curve were determined using statistical program MedCalc.


RESULTS
The senzitivity, specificity and positive likelihood ratio (+LR) for CDT-%, respectively, were 82.6, 96.7 and 24.8 for men (cut off 2.2%), and 60.0, 88.0 and 5.0 for women (cut off 2.5%). The respective values for GMT were 95.7, 90.0 and 9.6 for men (cut off 0.64 mu kat/l), and 90.0, 80.0 and 4.5 for women (cut off 0.38 mu kat/l); for MCV 82.6, 96.7 and 24.8 for men (cut off 95.0 fL), and 80.0, 100.0 and 20.0 for women (cut off 97.2 fL). The area under the ROC curve for CDT-%, GMT and MCV, respectively, were 0.940, 0.964 and 0.896 for men, and 0.829, 0.917 and 0.906 for women.


CONCLUSIONS
In men, CDT-% and MCV showed the same values of the statistical parameters studied. GGT was more sensitive and less specific. In women, all the parameters studied presented a lesser diagnostic value, except for MCV with 100% specificity and +LR 20.0.
Oddĕlení klinické biochemie a hematologie FN Brno.
M
M
Dastych
J
J
Bednarík
J
J
Pokora
B
B
Friedecký
H
H
Novotná
E
E
Moravcová
J
J
Vávrová
D000328:Adult; D020269:Alcoholic Neuropathy / Q000097:blood / Q000175:diagnosis; D000437:Alcoholism / Q000097:blood / Q000175:diagnosis*; D015415:Biomarkers / Q000097:blood; D004909:Erythrocyte Indices; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012372:ROC Curve; D012680:Sensitivity and Specificity; D014168:Transferrin / Q000031:analogs & derivatives* / Q000032:analysis*; D005723:gamma-Glutamyltransferase / Q000097:blood*
D015415:Biomarkers; D014168:Transferrin; C056759:carbohydrate-deficient transferrin; D005723:gamma-Glutamyltransferase