CLINICAL ATTRIBUTES AND RISK FACTORS FOR MECHANICAL VENTILATION AMONG PATIENTS WITH COVID-19 IN A COMMUNITY HOSPITAL SETTING: A PROPENSITY-MATCHED ANALYSIS

ABSTRACT

TOPIC Chest Infections TYPE Original Investigations PURPOSE: Covid-19 caused by the novel SARS-CoV-2 has emerged as a global health crisis with various clinical complications. Covid-19 related respiratory manifestations have been reported as mild, moderate to severe including acute lung injury and acute respiratory distress syndrome necessitating non-invasive forms of oxygenation to mechanical ventilation (MV). MV patients frequently undergo prolonged hospitalizations with substantial morbidity and mortality. We sought to evaluate risk factors for MV in our cohort. METHODS: We conducted a retrospective cohort study of patients admitted in our institution from March 1st to June 21st2020, to assess risk factors for Covid-19 related respiratory failure requiring MV. The original cohort encompassed 166 MV and 503 non MV patients. Information from our hospital medical records was extracted, which included demographics, presenting symptoms, past medical history, vital signals, and laboratory data and need for MV. We propensity matched 166 MV with a concurrent cohort of non MV patients in our institution. Covariates applied in matching included age, gender, race, and body mass index (BMI). The admission clinical attributes and laboratory parameters were analyzed, along with outcomes. RESULTS: The mean age of our matched cohort was 63.8 years. Mechanically Ventilated patients had a higher incidence of tachycardia (heart rate > 125) (p <.001), elevated respiratory rate > 24 cycles per minute (p <.001), fever > 97.8 F (Temperature > (p =.037), shortness of breath (p =.001), and headaches (p =.005). In addition, mechanically ventilated patients had a lower serum albumin (g/dl) ≤ 3 units (p <. 001), elevated serum creatinine (mg/dl) ≥ 1.135 units (p =.02), elevated serum CRP-HS ≥ 123 units (p =.005), HbA1C (%) > 6.6 units (p =.004), serum lactic acid (mmol/L) > 1.7 units (p =.003), serum LDH U/L > 465 U/L (p <.001), Procalcitonin (ng/ml) >.305 units (p <0.001), SGOT IU/L or AST IU/L ≥ 54 units (p < 0.001), SGPT or ALT IU/L ≥ 41 units (p =.021), and WBC count > 8.4 k/ul (p <.001). Furthermore, tachycardia (OR = 3.98, p =.001), HbA1C (OR = 2.36, p =.008), serum LDH (OR = 1.9, p =.041), and absolute lymphocyte percent ≤ 12 (OR = 1.98, p =.022) predicted mechanical ventilation in all matched patients in our institutional cohort. CONCLUSIONS: Our case series provides clinical characteristics, laboratory parameters, and predictors for mechanical ventilation in matched patients with Covid-19. Elevated heart rate, HbA1C, serum LDH and decreased lymphocyte percentage were predictors for mechanical ventilation. Tachycardia had the highest odds of 3.98. CLINICAL IMPLICATIONS Several clinical and laboratory parameters can be utilized for evaluating and stratifying Covid-19 patients’ risk for mechanical ventilation. These risk factors will need further validation in other similar cohorts. DISCLOSURES No relevant relationships by Olawale Akande, source=Web Response No relevant relationships by Olga Badem, source=Web Response No relevant relationships by Premila Bhat, source=Web Response No relevant relationships by Utpal Bhatt, source=Web Response No relevant relationships by Diego Castellon, source=Web Response No relevant relationships by Bhargav Desai, source=Web Response No relevant relationships by Basilides Fermin, source=Web Response No relevant relationships by Shurovi Jafar, source=Web Response No relevant relationships by KELASH KUMAR, source=Web Response No relevant relationships by Juan Martinez Zegarra, source=Web Response No relevant relationships by Tanveer Mir, source=Web Response No relevant relationships by Parvez Mir, source=Web Response No relevant relationships by Luis Morón Mercado, source=Web Response No relevant relationships by Beatriz Omeragic, source=Web Response No relevant relationships by Maxine Orris, source=Web Response No relevant relationships by Priyank Patel, source=Web Response No relevant relationships by Giovanna Ramirez-Barbieri, source=Web Response No relevant relationships by Luis Santana Alcantara, source=Web Response No relevant relationships by Karthik Seetharam, source=Web Response No relevant relationships by Jilan Shah, source=Web Response No relevant relationships by Phanthira Tamsukhin, source=Web Response No relevant relationships by Zeyar Thet, source=Web Response No relevant relationships by Elbia Toribio, source=Web Response No relevant relationships by Thinzar Wai, source=Web Response No relevant relationships by Vamsi Yenugadhati, source=Web Response