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Table 1 Basic characteristics of patients

From: Efficacy and experience of arthroscopic lateral patella retinaculum releasing through/outside synovial membrane for the treatment of lateral patellar compression syndrome

Parameter

TSM group

OSM group

Cases

66

59

Gender

 Men

23

18

 Women

43

41

 Age (Year)

16–65 (48.3)

17–66 (49.2)

Knee

 Left knee

32

28

 Right knee

34

31

 Medical history(M)

6–29 (18.5)

5–29 (19.1)

 History of trauma (Cases)

30

27

Outerbridge rating

 I-II

51

45

 III

10

8

 IV

5

6

 Combined meniscus injury

21

20

 Synovial fold hyperplasia

10

8

 Free body

8

8