Prevalence of long-lasting loss of smell and taste after coronavirus disease 2019 infection in Saudi Arabia

Abstract

BACKGROUND: People with coronavirus disease 2019 (COVID-19) who experience symptoms for more than 35 weeks are said to have long COVID. Anosmia can occur on its own or in combination with other COVID-19 symptoms. Anosmia may be a significant differential presentation for the suspicion and diagnosis of COVID-19 in patients with asymptomatic-to-mild COVID-19 disease and may disappear in 3 weeks. This study sought to determine the prevalence of persistent loss of taste and smell following COVID-19 in Saudi Arabia. MATERIALS AND METHODS: A population-based cross-sectional study was conducted among Saudi citizens who had been diagnosed with COVID-19 for more than 2 weeks and had experienced a loss of taste and smell. Data was collected using a questionnaire having questions about demographics, long-lasting loss of taste and smell, whether this related to COVID-19 infection, and whether respondents had received the COVID-19 vaccine. SPSS was used for data analysis; statistical significance was determined using Chi-square test. RESULTS: A total of 383 Saudis who had a history of COVID-19 participated in the study. About 43.3% study participants had experienced persistent loss of taste and smell after COVID-19 infection. A significant association was found between loss of smell and the region, Northern region having highest proportion of study participants who had loss of smell and Western region having the lowest prevalence (34%). CONCLUSION: There were permanent changes in the sense of taste or smell in 34.3% of participants. This might add to the growing weight of long COVID.