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Table 1 Descriptive statistics of the different groups

From: A retrospective study on the impact of bar flipping on the recurrence of pectus excavatum after the Nuss procedure

Flipping angle N cxrHIprea cxrHIpostb ΔcxrHIc I indexd
 ≤10° 131 3.69 ± 0.7 2.66 ± 0.4 1.03 ± 0.57 27 ± 10
11–20° 154 3.95 ± 0.8 2.77 ± 0.4 1.18 ± 0.77 28 ± 12
21–30° 51 3.94 ± 0.9 2.86 ± 0.4 1.09 ± 0.7 26 ± 12
 > 30° 23 3.96 ± 1.5 3.46 ± 1.3 0.5 ± 0.5 13 ± 9
  1. aHaller index on the preoperative chest radiograph
  2. bHaller index on the postoperative chest radiograph
  3. ccxrHIpre − cxrHIpost
  4. dimprovement index = (cxrHIpre − cxrHIpost)/cxrHIpre