Efficacy of Mask Wearing in Preventing the Deleterious Health Effects of the Ionic Components of PM2.5-Possibility Seen in Allergic Patients

Mask wearing can protect health care workers. However, its efficacy in avoiding the health effects of air pollution is not well studied. Recently, we evaluated the relationship between air pollution and health status or peak expiratory flow rate (PEFR). At the beginning of that study, about 20% of people were wearing masks. However, in the same period one year later, most people were wearing masks because of the COVID-19 pandemic. Therefore, in this study, we examined the relationship between mask wearing, concentration of ionic components of PM2.5, respiratory symptoms, and PEFR. Seventy-two patients in Fukuoka City with asthma and allergic diseases measured PEFR daily and recorded respiratory symptoms and mask wearing in a diary. We measured the ionic components of PM2.5 in Fukuoka City and examined the relationships between patient measurements, mask wearing, and air pollution. Univariate analysis showed that, in 2020, but not in 2021, some ionic components of PM2.5, i.e., Cl−, NO3−, Na+, and Mg2+, were significantly correlated with the frequency of cough and nasal symptoms and a decrease in PEFR. Some ionic components of PM2.5 may increase the frequency of respiratory symptoms and decrease PEFR in patients with allergic diseases;however, this tendency is not seen when masks are used. The use of masks may be one of the factors that attenuate the effects of PM2.5 ionic components.

Exacerbation of Urinary Storage Symptoms by the Psychological Stress Induced by the COVID-19 Pandemic.

BACKGROUND/AIM: This study aimed to determine whether psychological stress associated with the COVID-19 pandemic might exacerbate lower urinary tract symptoms (LUTS) and decrease lower urinary tract function in outpatients with LUTS. PATIENTS AND METHODS: We evaluated 104 patients who visited our hospital during the first wave of the COVID-19 pandemic. Psychological stress was evaluated by the Stress Response Scale-18 (SRS-18). Subjects were divided into aggravation and non-aggravation of psychological stress groups according to the SRS-18. LUTS was evaluated according to the International Prostate Symptom Score (IPSS). Lower urinary tract function was evaluated as the post-void residual urine volume (PVR). Comparisons of scores and changes in scores of each parameter before versus during/after the first wave of the COVID-19 pandemic were performed between the two groups. RESULTS: Forty-two patients were included in each group. We observed no significant differences in the comparison of scores at each time point and in changes in total IPSS score, voiding symptom subscores and PVR between the two groups. Although no significant differences in storage symptom subscores were observed between the two groups, changes in storage symptom subscores increased significantly during the first wave of the pandemic in the aggravation of psychological stress group (p=0.02). However, no significant increase was observed after the first wave. CONCLUSION: Psychological stress during the COVID-19 pandemic might transiently aggravate storage symptoms in patients with LUTS. Physicians should be aware of the possibility of transient worsening of LUTS during future pandemics, and transiently additional medication might be effective in such patients.

Impact of visceral fat on the prognosis of coronavirus disease 2019: an observational cohort study.

BACKGROUND: Clarification of the risk factors for coronavirus disease 2019 (COVID-19) severity is strongly warranted for global health. Recent studies have indicated that elevated body mass index (BMI) is associated with unfavorable progression of COVID-19. This is assumed to be due to excessive deposition of visceral adipose tissue (VAT); however, the evidence investigating the association between intra-abdominal fat and COVID-19 prognosis is sparse. We therefore investigated whether measuring the amount of intra-abdominal fat is useful to predict the prognosis of COVID-19. METHODS: The present study enrolled 53 consecutive cases of COVID-19 patients aged ≥ 20 years with chest computed tomography (CT) scans. The VAT area, total adipose tissue (TAT) area, and VAT/TAT ratio were estimated using axial CT images at the level of the upper pole of the right kidney. Severe COVID-19 was defined as death or acute respiratory failure demanding oxygen at ≥ 6 L per minute, a high-flow nasal cannula, or mechanical ventilation. The association of VAT/TAT with the incidence of progression to a severe state was estimated as a hazard ratio (HR) using Cox regression analysis. To compare the prediction ability for COVID-19 disease progression between BMI and VAT/TAT, the area under the receiver operating characteristic curve (AUC) of each was assessed. RESULTS: A total of 15 cases (28.3% of the whole study subjects) progressed to severe stages. The incidence of developing severe COVID-19 increased significantly with VAT/TAT (HR per 1% increase = 1.040 (95% CI 1.008-1.074), P = 0.01). After adjustment for potential confounders, the positive association of VAT/TAT with COVID-19 aggravation remained significant (multivariable-adjusted HR = 1.055 (95% CI 1.000-1.112) per 1% increase, P = 0.049). The predictive ability of VAT/TAT for COVID-19 becoming severe was significantly better than that of BMI (AUC of 0.73 for VAT/TAT and 0.50 for BMI; P = 0.0495 for the difference). CONCLUSIONS: A higher ratio of VAT/TAT was an independent risk factor for disease progression among COVID-19 patients. VAT/TAT was superior to BMI in predicting COVID-19 morbidity. COVID-19 patients with high VAT/TAT levels should be carefully observed as high-risk individuals for morbidity and mortality.