Fig. 1

Nomogram to predict the risk of tracheostomy after cervical spinal cord injury. The patient’s score for each risk predictor is plotted on the appropriate scale and vertical lines are drawn from that value to the top points scale to obtain the corresponding scores. All scores are summed to obtain the total points score. The total points score is plotted on the bottom Total Points scale. The corresponding value shows the predicted probability of tracheostomy. C-index = 0.881, SD = 0.039, P < 0.05