Detection of Relapses in Alcohol‐Dependent Patients: Comparison of Carbohydrate‐Deficient Transferrin in Serum, 5‐Hydroxytryptophol in Urine, and Self‐Reports

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Abstract
In this study, detection of relapses in male alcohol-dependent patients by biochemical markers and self-reports of alcohol consumption were examined. The patients were trying to stay abstinent from alcohol for 6 months. Four of 15 patients dropped out from treatment after 50–110 days. Ratios of urinary 5-hydroxytryptophol (S-HTOL)/5-hydroxyindole-3-acetic acid and 5-HTOL/creatinine were measured daily and serum carbohydrate-deficient transferrin (CDT) once a week. Clinical ratings and self-reports about alcohol consumption were performed three times a week. According to the self-reports, 3 of the patients drank alcohol frequently, 5 of them sporadically, and 7 of the patients reported no alcohol intake at all. According to the 5-HTOL marker, 4 of the patients drank alcohol frequently, and 11 of them sporadically. No one had all urinary levels of 5-HTOL marker below the reference level. According to the CDT, 3 of the patients drank alcohol frequently, 3 sporadically, and in 9 of the patients no elevated levels of CDT were found. Elevated levels of CDT were preceded by increased values of 5-HTOL marker. The combined results suggested that no one of the patients was totally abstinent from alcohol during the treatment period. The 5-HTOL marker seemed to be useful to reveal recent alcohol drinking, and CDT proved to be useful to validate the patients' self-reports. Together the two biochemical markers showed complementary properties in early detection of relapse and treatment monitoring.