Fig. 1From: The effect of COVID-19 pandemic on perioperative factors: data from the Swedish Perioperative RegisterProportion of acute and elective surgery during the three time periods. Period 1 = pre-pandemic period, March–June 2019; period 2 = first wave of the COVID-19 pandemic in Sweden, March–June 2020; period 3 = 1 year into the pandemic, March–June 2021Back to article page