Sociodemographic characteristics and risk factors associated to significative bacteriuria in a Spanish health area

Abstract

Objective. To determine the epidemiological characteristics of significative bacteriuria (SB) and their relationship with sociodemographic factors and to analyze risk factors in inpatients. Material and methods. Cross-sectional descriptive study carried out on urine culture samples received between 20162020 in the Microbiology laboratory, differentiating between minors and adults. The dependent variable was the presence of SB and the independent variables were age, sex, year, type of sample and source of the sample. In urine cultures of inpatients, risk factors were evaluated from the Minimum Basic Data Set. Results. A total of 68,587 valid records (96.3% of the total) were analyzed. 40.8% (95% CI: 40.4%-41.2%) of urine cultures in adults and 33.8% (95% CI: 32.9%-34.7%) in children were positive, with an incidence that ranged in adults between 18.2 cases/1,000 inhabitants in 2016 and 14.6 cas- es/1,000 inhabitants in 2020 and 21.1 and 8.4 cases/1,000 inhabitants respectively in minors. Positive urine cultures were more frequent in children from urban areas compared to rural areas (OR=1.37; p<0.01). In hospitalized adults, for each year of age the risk of SB increased by 2%, it was 36% higher in women, 18% higher in obese patients and 17% more frequent in patients with kidney disease, (p<0.01). No relationship was observed between SB and diagnosis of COVID-19. Conclusion. The sociodemographic characteristics of the population with SB in our health area are similar to those found in other geographical areas worldwide, observing a de­creasing trend in incidence in the years studied. The frequency of SB in children is higher in urban areas.