Fig. 5From: Pedicle screw loosening: the value of radiological imagings and the identification of risk factors assessed by extraction torque during screw removal surgeryScatter diagram of patients’ average torques and ages. The results showed a low but significant linear correlation between extraction torque and patients’ age p = 0.045, R2 = 0.123, F = 4.345, Linear regression analysisBack to article page