Table 3 Clinical outcomes of the enrolled patients according to the shape of acromion

 Pain

6.8 + 2.5 (1–10)

6.9 + 3.2 (1–10)

0.62

6.5 + 2.6 (2–10)

7.3 + 2.2 (2–10)

0.3

6.1 + 3.1 (1–10)

6.7 + 3.5 (1–10)

0.78

 Function

7.3 + 2.4 (2–10)

7.1 + 3.3 (1–10)

0.74

6.4 + 2.8 (2–10)

7.9 + 2.7 (2–10)

0.03*

6.7 + 2.4 (2–10)

6.1 + 3.8 (1–10)

0.95

 Forward Flexion

4.5 + 0.9 (2–5)

4.5 + 0.9 (3–5)

0.6

4.3 + 0.9 (2–5)

4.5 + 1 (1–5)

0.1

4.1 + 1.4 (2–5)

4.3 + 1.1 (2–5)

1.00

 Strength

3.5 + 1.1 (1–5)

3.9 + 1 (2–5)

0.3

3.7 + 1 (2–5)

4.1 + 0.9 (2–5)

0.15

3.2 + 1.3 (1–5)

3.4 + 1 (2–5)

1.00

 Satisfaction

4.8 + 1 (0–5)

4.8 + 1 (0–5)

1.00

5 + 0

4.8 + 1 (0–5)

0.29

4.4 + 1.8 (0–5)

4.3 + 1.9 (0–5)

0.95

Final score

27.1 + 6.6 (6–35)

27.3 + 8.2 (10–35)

0.41

25.8 + 6.1 (15–35)

28.6 + 5.9 (13–35)

0.09

24.6 + 7.7 (11–33)

24.9 + 10 (6–35)

0.87

 Pain

3.1 + 0.8 (1–4)

3 + 1 (1–4)

0.84

2.7 + 0.9 (1–4)

2.8 + 0.9 (1–4)

0.81

2.6 + 0.7 (1–3)

2.7 + 1.6 (0–4)

0.46

 Active abduction

3.5 + 0.9 (1–4)

3.4 + 0.9 (2–4)

0.81

3.3 + 0.8 (1–4)

3.7 + 0.8 (1–4)

0.02*

3.2 + 1.2 (1–4)

3.1 + 1.2 (1–4)

0.87

 Strength

3.2 + 0.6 (2–4)

3.3 + 0.9 (1–4)

0.28

3 + 0.7 (2–4)

3.4 + 0.6 (2–4)

0.04*

2.5 + 1.1 (1–4)

2.9 + 1.1 (1–4)

0.54

 Function

3 + 0.8 (1–4)

3.3 + 0.8 (1–4)

0.11

3.2 + 0.5 (2–4)

3.4 + 0.6 (2–4)

0.17

3 + 0.5 (2–4)

3.1 + 1.1 (1–4)

0.46

 Satisfaction

0.8 + 0.7 (− 1–1)

0.9 + 0.4 (− 1–1)

0.28

1 + 0

0.9 + 0.4 (− 1–1)

0.29

0.7 + 0.7 (− 1–1)

0.7 + 0.7 (− 1–1)

0.95

Final score

13.5 + 3 (4–17)

13.9 + 3.4 (6–17)

0.33

13.2 + 2.2 (9–17)

14.2 + 2.6 (8–17)

0.09

12.1 + 3.2 (7–16)

12.6 + 5.4 (2–17)

0.4

OSS

23.1 + 11.7 (12–53)

21.9 + 12.4 (12–51)

0.32

21.6 + 9.2 (12–46)

21 + 7.4 (12–35)

0.94

28.5 + 14.3 (13–51)

28 + 13.6 (12–47)

0.78