Follow-up outcomes
The pooled estimates of postoperative stroke and SCI were 5% (95% CI 4 – 7; I2 = 63.93%) and 3% (95% CI 2 – 4; I2 = 19.56%), respectively (Figure 2). The pooled estimates of acute kidney injury, bleeding, and in-hospital mortality were found to be 12% (95% CI 9 – 15;I2 = 86.65%), 6% (95% CI 3 – 8;I2 = 71.05%), and 7% (95% CI 5 – 9;I2 = 68.65%), respectively (Figure 3).