Clinical characteristics of a group of patients who persist with respiratory symptoms after the acute phase of COVID-19

ABSTRACT

Abstract In convalescence from the SARS-CoV-2 infection, a high number of patients require medical consultation due to persisting symptoms. Objective: To describe the clinical characteristics of patients who attend the Department of Respiratory Medicine due to persisting respiratory or thoracic symptoms after COVID-19 epidemiological discharge, and to assess their etiology by applying a follow-up protocol. Materials and Methods: we included patients previously diagnosed with COVID-19 through PCR or with a combination of symp toms and epidemiological criteria who attended the Department of Respiratory Medicine spontaneously or referred by another health professional. Clinical examination, chest X-ray, spirometry, laboratory analysis, and the EQ-5D quality of life and PHQ-9 depression questionnaires were performed. According to the findings, the evaluation was complemented with D-dimer, six-minute walk test (6MWT), computed tomography (CT) and cardiac evaluation, following a predetermined algorithm. Mental health consultation was offered to patients with a result ≥ 10 in the PHQ-9 questionnaire. Results: 95 patients were included age 48 ± 11 years, BMI (Body Mass Index) = 28.4 ± 4.9 kg/m2, 57 (60%) women and 64 (67.5%) Argentinians. Among foreigners 19 (20%) were Bolivian, 8 (8.5%) Peruvian and 4 (4%) Paraguayan. 91 patients had a PCR-confirmed diagnosis; and from the remaining patients, two had positive serology and two clinical and epidemiological criteria. The most frequent comorbidities were smoking (34%), arterial hypertension (21%), diabetes (16%), asthma (11%) and tuberculosis (5%); 38% did not refer any. 45 patients had been hospitalized, and 8 of them required treatment in the intensive care unit (ICU). The consultation time from epidemiological discharge was 46 ± 34 days (median = 38 days), and the most frequent symptoms were dyspnea (60%), cough (32%), chest pain (26%), low back pain (22%) and asthenia (10.5%); 50 patients required non-steroidal anti-inflammatory drugs (NSAIDs) for pain management. Regarding the depression questionnaire 79% presented PHQ-9 > 4 (mild depression) and 36% ≥ 10 (moderate and severe depression); in the latter group we found higher prevalence in women 44 vs. 24%, p= 0.03. We didn't find a relationship between depression assessed with PHQ-9 and age, nationality or isolation location; 13 patients agreed to consult with the Department of Mental Health (PHQ-9 14.9 ± 4; EQ-5D 39 ± 10). In 6 patients, the spirometry showed values of forced expiratory volume in the first second (FEV1) and/or forced vital capacity (FVC) < 80%; they had history of pneumoconiosis (n = 1), asthma (n = 1) and obesity (n = 1), two presented an abnormal chest X-ray and the other one had been treated in the intensive care unit (ICU). Additional studies were performed in 24 patients (six-minute walk test [6MWT] 3, CT 6, echocardiogram 2, D-dimer 21). Persistence of ground-glass densities was found in 5 of the 6 tomographies. None of the patients required an additional medical approach during follow-up. Conclusion: In post-COVID-19 patients, the most frequent symptoms for consultation were dyspnea, cough and chest or lumbar pain, as well as the finding of depression assessed by a questionnaire. The results favor the holistic approach in the evaluation and follow-up of these cases.