Smell and Taste Loss Recovery Time in COVID-19 Patients and Disease Severity
Total Page:16
File Type:pdf, Size:1020Kb
Journal of Clinical Medicine Article Smell and Taste Loss Recovery Time in COVID-19 Patients and Disease Severity Athanasia Printza 1,* , Mihalis Katotomichelakis 2, Konstantinos Valsamidis 1, Symeon Metallidis 3, Periklis Panagopoulos 4, Maria Panopoulou 5, Vasilis Petrakis 4 and Jannis Constantinidis 1 1 First Otolaryngology Department, Medical School, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] (K.V.); [email protected] (J.C.) 2 Otolaryngology Department, School of Health Sciences, Democritus University of Thrace, Dragana, 387479 Alexandroupoli, Greece; [email protected] 3 First Department of Internal Medicine, AHEPA Hospital, Medical School, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] 4 Department of Internal Medicine, School of Health Sciences, Democritus University of Thrace, Dragana, 387479, Alexandroupoli, Greece; [email protected] (P.P.); [email protected] (V.P.) 5 Laboratory of Microbiology, School of Health Sciences, Democritus University of Thrace, Dragana, 387479 Alexandroupoli, Greece; [email protected] * Correspondence: [email protected] or [email protected] Abstract: A significant proportion of people infected with SARS-CoV-2 report a new onset of smell or taste loss. The duration of the chemosensory impairment and predictive factors of recovery are still unclear. We aimed to investigate the prevalence, temporal course and recovery predictors in patients who suffered from varying disease severity. Consecutive adult patients diagnosed to be infected with SARS-CoV-2 via reverse-transcription–polymerase chain reaction (RT-PCR) at two Citation: Printza, A.; coronavirus disease-2019 (COVID-19) Reference Hospitals were contacted to complete a survey Katotomichelakis, M.; Valsamidis, K.; reporting chemosensory loss, severity, timing and duration, nasal symptoms, smoking, allergic Metallidis, S.; Panagopoulos, P.; rhinitis, chronic rhinosinusitis, comorbidities and COVID-19 severity. In a cross-sectional study, Panopoulou, M.; Petrakis, V.; Constantinidis, J. Smell and Taste we contacted 182 patients and 150 responded. Excluding the critically ill patients, 38% reported Loss Recovery Time in COVID-19 gustatory and 41% olfactory impairment (74% severe/anosmia). Most of the patients (88%) recovered Patients and Disease Severity. J. Clin. their sense of smell by two months (median: 11.5 days; IQR: 13.3). For 23%, the olfactory loss Med. 2021, 10, 966. https://doi.org/ lasted longer than a month. There were no significant differences in the prevalence and duration of 10.3390/jcm10050966 chemosensory loss between groups of varying COVID-19 severity, and sexes (all p > 0.05). Moderate hyposmia resolved quicker than more severe loss (p = 0.04). Smell and taste loss are highly prevalent Academic Editor: Alfonso Del Cuvillo in COVID-19. Most patients recover fast, but nearly one out of ten have not recovered in two months. Received: 31 January 2021 Keywords: olfactory dysfunction; coronavirus disease-2019; COVID-19; loss of smell; anosmia; loss Accepted: 24 February 2021 of taste; post-viral; recovery; disease severity; gustatory dysfunction; chemosensory loss Published: 2 March 2021 Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in 1. Introduction published maps and institutional affil- iations. Since the coronavirus disease-2019 (COVID-19) pandemic outbreak, many studies have demonstrated that a significant proportion of people who test positive for COVID-19 have a new onset of smell or taste loss [1–4]. The Centers for Disease Control and Pre- vention, the World Health Organization, and National Public Health Authorities added ‘new loss of taste or smell’ to the list of symptoms related to COVID-19. The pathogenesis Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. of anosmia related to SARS-CoV-2 has not been defined and most studies have shown This article is an open access article that COVID-19-related olfactory dysfunction demonstrates distinct characteristics differ- distributed under the terms and entiating it from post-viral olfactory loss related to other viral causes [1,5]. The olfactory conditions of the Creative Commons loss is of sudden onset, usually profound, and comes early in the disease process [3,4,6,7]. Attribution (CC BY) license (https:// The duration of the smell and taste disorders in COVID-19 disease is still unclear. Many creativecommons.org/licenses/by/ studies reported a quick recovery in the majority of patients [1,8,9]. However, chronic 4.0/). symptoms after COVID-19 disease, including persisting fatigue and loss of taste and smell, J. Clin. Med. 2021, 10, 966. https://doi.org/10.3390/jcm10050966 https://www.mdpi.com/journal/jcm J. Clin. Med. 2021, 10, 966 2 of 9 have been reported by patients even several months after the onset of the disease [10,11]. The long-term recovery and the influence of the COVID-19 severity or the chemosensory dysfunction severity on the outcome are not clear. We aimed to investigate the longer-term recovery of smell and taste loss in COVID-19 patients who suffered from varying disease severity and chemosensory impairment severity. 2. Materials and Methods A telephone survey was conducted on consecutive adult patients diagnosed as being infected with SARS-CoV-2 at two COVID-19-Reference University Hospitals, in March and April 2020, in a cross-sectional study. All patients had been diagnosed via a reverse- transcription–polymerase chain reaction (RT–PCR). The study had ethics approval by the two institutional review boards. Three call attempts for each participant were made. All participants provided verbal consent during the interviews. Patients who were not reachable or reported that they did not recall the relevant period events were excluded. Olfactory or/and gustatory disorders before COVID-19 and cognitive disorders were also exclusion criteria. We did not collect data for the deceased patients. The patients were contacted and asked to complete a survey related to taste and smell impairment related to COVID-19 (Table1. The telephone survey content). It included questions about impairment of smell and taste, nasal congestion, and rhinorrhea. The patients were asked to rate the severity of every symptom on an ordinal scale with the following response options: 0: no loss/absence of the symptom; 1: mild; 2: moderate; 3: severe; 4: extremely severe. The sur- vey also included questions about the timing and duration of symptoms, smoking, history of allergic rhinitis, and chronic rhinosinusitis (CRS). Demographic characteristics (sex and age) and comorbidities were also recorded. Information on severity ratings of COVID-19 was collected from the medical records. The clinical severity of COVID-19 was defined as described by WHO [12] as mild, moderate, severe, and critical. The mild disease includes symptomatic patients meeting the case definition for COVID-19 without evidence of viral pneumonia or hypoxia, moderate patients not exhibiting signs of severe pneumonia, severe patients with clinical or radiographic signs of severe pneumonia including SpO2 < 90% on room air or respiratory rate > 30 breaths/min, and critical ICU-treated patients. Table 1. The telephone survey content. During Your COVID-19 Illness 1. Did you experience loss/impairment of smell? The severity in an ordinal scale 0–4 2. Did you experience loss/impairment of taste? The severity in an ordinal scale 0–4 3. Did you experience nasal congestion/obstruction? The severity in an ordinal scale 0–4 4. Did you experience rhinorrhea? The severity in an ordinal scale 0–4 5. When did you first notice the loss of smell? Before/After diagnosis 6. Did the loss/impairment of smell resolve and when? Yes • No Days from onset 7. Did the loss/impairment of taste resolve and when? Yes • No Days from onset 8. Are you smoking? Yes • No • Ex-smoker • Electronic 9. Do you have a history of allergic rhinitis? Yes • No 10. Do you have a history of chronic rhinosinusitis? Yes • No Statistical Analysis Data were analyzed with IBM SPSS Statistics for Windows version 25.0 (IBM Corp., Armonk, NY, USA). Descriptive statistics were obtained; continuous variables are ex- pressed as means with standard deviation, while categorical variables are presented as frequencies (percentages). The normality of the variables was ascertained with the Kolmogorov–Smirnov and Shapiro–Wilk test when the number of data was more or less than 50 respectively. Differences between not normally distributed quantitative data were J. Clin. Med. 2021, 10, 966 3 of 9 assessed with the use of the Mann–Whitney U test for independent samples. For differences of qualitative parameters between groups, the Chi-square test was applied. For multiple comparisons between more than two groups of not normally distributed quantitative and qualitative variables, Kruskal–Wallis and Chi-square tests were performed, respectively. No post hoc pairwise comparisons were performed. Correlations between two categorical variables were evaluated either with the use of the Chi-square test or Fisher’s Exact test (in the case of dichotomous categorical variable), and logistic regression was applied to check associations between a categorical and a continuous variable. A p value of <0.05 was considered as the statistical significance level. 3. Results We contacted 182 patients. Twenty-six were not reachable, five declined to participate, one had a history of hyposmia. The study cohort consisted of 150 patients (all Caucasian), with a mean age of 51.6 ± 16.8 (ranging from 18 to 89 years). The patients’ demographic and clinical characteristics are presented in Table2. Table 2. The patients’ demographic and clinical characteristics. Patients, n = 150, n (%) Age, years 18–89 Mean ± SD 51.6 ± 16.8 Sex Male 93 (62) Female 57 (38) Smoking 21 (14) Allergic rhinitis 11 (7) Chronic rhinosinusitis 3 (2) Comorbidities No medical history 86 (57) Hypertension 30 (20) Diabetes 16 (11) Cardiopathy 9 (6) Covid-19 severity Mild 56 (37) Moderate 50 (33) Severe 34 (23) Critical (ICU-treated) 10 (7) Hospitalized 94 (63) n: number of patients; %: percentage, SD: standard deviation.