Treatment initiation or switch to BIC/FTC/TAF - real-world safety and efficacy data from two HIV centers in Romania.

INTRODUCTION: Development of highly active antiretroviral therapy marked an important step forward in the management of people living with HIV and fixed dose combinations are now available to be used as modern antiretroviral regimens. The single-tablet regimen bictegravir/emtricitabine/tenofovir alafenamide (BIC/FTC/TAF) was recently approved in Europe and included in international guidelines and recommendations. It became available in Romania in early 2021. We present the real-world results from a retrospective analysis of patients initiating BIC/FTC/TAF in two HIV centers in Romania. METHODS: This retrospective analysis included patients treated with BIC/FTC/TAF (first-line or switch) in two HIV centers in Romania, one in Bucharest and one in Iași. We collected data on baseline patient characteristics, reasons for initiation of BIC/FTC/TAF and preliminary clinical and laboratory efficacy, safety and tolerability data. All assessments had been performed according to local practice. Statistical analyses were mostly descriptive and association analysis was performed to assess changes in laboratory parameters from baseline to data cut-off (October 2021). RESULTS: In total, 122 patients were initiated on BIC/FTC/TAF in routine clinical practice from February to October 2021 in the two HIV centers, either as first-line or switch. The majority of patients were male (71%). The median age at baseline was 35.0 years (IQR 32.0-50.8 years). Overall, 91 patients (75%) were treatment-experienced and the most frequent reason for switch was treatment simplification (79%). The mean ± standard deviation follow-up duration on treatment with BIC/FTC/TAF was 101.6 ± 64.2 days until the cut-off date for this analysis. We found no significant changes in lipid values, blood glucose or liver enzymes, coupled with a significant decrease in viral load (p=0.001). A low number of adverse events occurred during the treatment period (n=4): two cases of fatigue and two gastrointestinal reactions. No patient discontinued BIC/FTC/TAF and the overall tolerability was good. CONCLUSIONS: The insights of the first report on BIC/FTC/TAF use in routine clinical practice in Romania provide an overview of effectiveness and safety to local clinicians treating this patient population.

Inside of the Linear Relation between Dependent and Independent Variables.

Simple and multiple linear regression analyses are statistical methods used to investigate the link between activity/property of active compounds and the structural chemical features. One assumption of the linear regression is that the errors follow a normal distribution. This paper introduced a new approach to solving the simple linear regression in which no assumptions about the distribution of the errors are made. The proposed approach maximizes the probability of observing the event according to the random error. The use of the proposed approach is illustrated in ten classes of compounds with different activities or properties. The proposed method proved reliable and was showed to fit properly the observed data compared to the convenient approach of normal distribution of the errors.