Fig. 2
From: Remifentanil-induced alterations in neutrophil numbers after surgery
Correlations between the postoperative neutrophil count and duration of surgery in fentanyl group (thick line and dark shadow), and between the postoperative neutrophil count and duration of surgery in remifentanil group (dotted line and light shadow). The dark shadow represents the 95 % confidence interval (CI) in fentanyl group and the light shadow represents the 95 % CI in remifentanil group. Neutrophil count =5335-2.2*duration of surgery (min). R 2 = 0.00, P = 0.92 (Fentanyl group). Neutrophil count = -1349 + 51.8*duration of surgery (min). R 2 = 0.36, P = 0.0044 (Remifentanil group)