Change in the Pathologic Supraspinatus: A Three-Dimensional Model of Fiber Bundle Architecture within Anterior and Posterior Regions

Table 4

Median lateral PA values for the superficial, middle, and deep parts of the anterior and posterior regions.

Region of muscle and tear category		PA lat. (degree)
		Superficial	Middle	Deep
Anterior
A	4	14.26^a* (2.62–45.24)	15.71^a* (2.04–40.86)	14.15^a* (2.37–35.39)
B	4	15.59^a** (2.27–46.37)	12.73^b** (2.01–42.70)	14.15^ab** (2.89–40.38)
C	4	25.16^a*** (2.06–64.58)	22.92^a*** (2.18–80.38)	21.80^a*** (3.15–74.67)
Posterior
A	4	26.39^a**** (2.04–38.81)	25.60^a**** (2.19–36.34)	18.79^b (3.92–36.57)
B	4	27.17^a (9.86–41.02)	23.43^b (4.42–47.55)	17.71^c (6.32–32.00)
C	2	38.46^† (7.82–55.23)	35.25^† (2.42–51.13)	25.17^† (2.55–46.18)

A: partial thickness tendon tear; B: full-thickness tear with no retraction of tendon; C: full-thickness tendon tear with retraction; PA lat.: lateral pennation angle; median with ( ) minimum and maximum values. If superscript letters are different, it indicates statistically significant (P < 0.001) difference between the superficial, middle, and deep parts of specimens within the same tear category. ^*P = 0.167; ^**P = 0.022 superficial and deep, P = 0.071 middle and deep; ^***P = 0.274; ^****P = 0.238; ^†statistical analysis was not conducted due to sample size.