Prognostic implications of comorbidity patterns in critically ill COVID-19 patients: A multicenter, observational study.

Background: The clinical heterogeneity of COVID-19 suggests the existence of different phenotypes with prognostic implications. We aimed to analyze comorbidity patterns in critically ill COVID-19 patients and assess their impact on in-hospital outcomes, response to treatment and sequelae.

Methods: Multicenter prospective/retrospective observational study in intensive care units of 55 Spanish hospitals.

Long thoracic nerve injury in breast cancer patients treated with axillary lymph node dissection.

Purpose: The objectives of this study were to electromyographically (EMG) describe and analyze factors associated with long thoracic nerve injuries in breast cancer patients after axillary lymph node dissection.

Methods: This was a prospective longitudinal observational study. Two hundred sixty-four women with primary invasive breast cancer were included between 2008 and 2011.