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. 2023 Dec 19;11(12):e5499. doi: 10.1097/GOX.0000000000005499

Table 5.

Variations in Costal Angular Measurements (12th Rib)

Variable Measurement Median IR Chi Square P
Angular measurements (degrees) Presurgery 172.00 (175–165) 90.0 0.000
12th rib Im postsurgery 162.00 (165–155)
1 month postsurgery 154.00 (157–147)
3 months postsurgery 165.00 (168–158)

Friedman nonparametric test.

IR, interquartile range.

Im, immediate postoperative moment.