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  Indian J Med Microbiol
 

Figure 1: Association between Hb level and major complications. (a) The restricted cubic spline curve was shown for the free flap complication by decrements in preoperative Hb level, (b) postoperative Hb level, (c) absolute change of Hb level and (d) relative change of Hb level, with shadow area for 95% CI. Only preoperative Hb level and postoperative Hb level as a continuous variable was significantly associated with decreased free flap complications (n = 623, P = 0.011 in preparative Hb level; P = 0.024 in postoperative Hb level within 2 h). Hb: Hemoglobin, CI: Confidence interval.

Figure 1: Association between Hb level and major complications. (a) The restricted cubic spline curve was shown for the free flap complication by decrements in preoperative Hb level, (b) postoperative Hb level, (c) absolute change of Hb level and (d) relative change of Hb level, with shadow area for 95% CI. Only preoperative Hb level and postoperative Hb level as a continuous variable was significantly associated with decreased free flap complications (<i>n</i> = 623, <i>P</i> = 0.011 in preparative Hb level; <i>P</i> = 0.024 in postoperative Hb level within 2 h). Hb: Hemoglobin, CI: Confidence interval.