BACKGROUND/AIMS: The present study aimed to clarify whether virological response within 2 weeks after therapy initiation can predict a null response to pegylated interferon alpha-2b plus ribavirin therapy in patients with high viral load genotype 1b hepatitis C. METHODS: The participants consisted of 72 patients with high viral load genotype 1b. The dynamics of viral load within 2 weeks were measured. RESULTS: Significant differences between null responders and nonnull responders were noted for interleukin (IL)-28B genotype, amino acid 70 substitution, alpha-fetoprotein, low-density lipoprotein cholesterol, hyaluronic acid, and viral response. The area under the curve (AUC) for the receiver operating characteristic curve of the hepatitis C virus (HCV) RNA level decline at 2 weeks (AUC=0.993) was the highest among the factors predicting the null response. When the cutoff value for the HCV RNA level decline at 2 weeks was set at 0.80 log, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy in predicting a null response were 82%, 96%, 82%, 96%, and 94%, respectively. In comparison, values for the non-TT and mutant type of amino acid 70 substitution were similar to those for HCV RNA level decline at 2 weeks. CONCLUSIONS: Virological response at 2 weeks or the combination of IL-28B and amino acid 70 substitution are accurate predictors of a null response.
Administration, Oral ; Adult ; Aged ; Antiviral Agents/*administration & dosage ; Area Under Curve ; Drug Therapy, Combination ; Female ; Genotype ; Hepatitis C, Chronic/*drug therapy/genetics ; Humans ; Injections, Subcutaneous ; Interferon-alpha/*administration & dosage ; Male ; Medication Adherence ; Polyethylene Glycols/*administration & dosage ; Prospective Studies ; RNA, Viral/metabolism ; Recombinant Proteins/administration & dosage ; Ribavirin/*administration & dosage ; Treatment Outcome ; Viral Load ; Young Adult

People with high health knowledge tend to use information and communication technology (ICT) to obtain, maintain, and promote information necessary for health management. Therefore, experts hypothesize that improving health knowledge will increase the use of online medication guidance via ICT. In this study, we investigated the relationship between health knowledge and willingness to use online medication guidance among Iwaki Health Promotion Project health checkup subjects. The 736 examinees participating in this project in 2022 were surveyed on age, gender, number of people living with them, whether they exercise, drink alcohol, or smoke, whether they use smartphones, whether they use medication registers, their health knowledge score, and whether they take any medications. The presence/absence of desire for online medication guidance (1/0) was used as the objective variable to identify influencing factors. Univariate and multivariate analyses showed that independence was found for four factors: age (OR: 0.975, P<0.001), gender (male) (OR: 1.914, P<0.001), smartphone use (OR: 2.156, P＝0.004) and health knowledge score (OR: 1.405, P<0.001). This study found that health knowledge plays a role in the intention to use online medication guidance. In order to improve health knowledge, it will be necessary to enhance skills to obtain and use high-quality health information and to improve the environment for using ICT-based communication devices.