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Table 3 AHI in the perioperative period: median (IQR [range]) in all examined individuals

From: Incidence of perioperative sleep-disordered breathing in patients undergoing major surgery: a prospective cohort study

  All individuals (n = 37) Sign. difference to preoperative values (Wilcoxon-Test - Bonferroni adjusted)
Preoperative night (n = 37) 6,0 (2,6 - 14,7 [0–32,6])  
1. Postoperative night (n = 4) 4,6 (1,8 - 9,1 [1,2 - 10,2])  
2. Postoperative night (n = 18) 5,6 (2,6 - 15,0 [1,1 - 59,3]) n.s.
3. Postoperative night (n = 21) 16,9 (5,6 - 38,8 [2,9 - 64,3]) p = 0,01
4. Postoperative night (n = 28) 11,6 (5,9 - 17,4 [0,4 - 39,3]) p = 0,045
5. Postoperative night (n = 28) 15,2 (5,7 - 22,2 [0,2 - 55,5]) p = 0,005
6. Postoperative night (n = 11) 22,5 (5,2 - 35,4 [0,2 - 67,7]) p = 0,04