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Table 1 Characteristics of the volleyball athletes (n = 271)

From: Fc receptor-like 3 (−169T>C) polymorphism increases the risk of tendinopathy in volleyball athletes: a case control study

Variables

Controls

(n = 125)

Tendinopathy

(n = 146)

p-valuea

OR (95% CI)

Age group

n (%)

  

 Sub - 18

47 (37.6)

14 (9.6)

< 0.001

1b

 Sub - 23

40 (32.0)

33 (22.6)

2.77 (1.30–5.89)

 Adult

38 (30.4)

99 (67.8)

8.75 (4.33–17.69)

Gender

 Female

52 (41.6)

29 (19.9)

< 0.001

1b

 Male

73 (58.4)

117 (80.1)

2.87 (1.67–4.93)

Ethnicityc

 White

67 (74.4)

36 (85.7)

0.41

1b

 Intermediate

5 (5.6)

2 (4.8)

0.74 (0.14–4.03)

 Black

18 (20.0)

4 (9.5)

0.41 (0.13–1.31)

Years of practice in volleyball

 0–5

45 (36.0)

17 (11.6)

< 0.001

1b

 6–10

46 (36.8)

40 (27.4)

2.30 (1.14–4.64)

 11–15

22 (17.6)

51 (34.9)

6.14 (2.90–12.98)

  > 15

12 (9.6)

38 (26.1)

8.38 (3.56–19.73)

Declared preference

 Right

120 (96.0)

141 (96.6)

0.53

1b

 Left

5 (4.0)

5 (3.4)

0.85 (0.24–3.01)

Function

 Spiker

90 (72.0)

115 (78.8)

0.34

1b

 Setter

22 (17.6)

22 (15.1)

0.78 (0.41–1.50)

 Libero

13 (10.4)

9 (6.1)

0.54 (0.22–1.32)

Traumatic lesion

 No

85 (68.0)

88 (60.3)

0.23

1b

 Yes

40 (32.0)

58 (39.7)

1.40 (0.85–2.31)

Tendon pain

 No

47 (37.6)

14 (9.6)

< 0.001

1b

 Yes

78 (62.4)

132 (90.4)

5.68 (2.94–10.98)

Away from training due pain

 No

91 (72.8)

80 (54.8)

0.003

1b

 Yes

34 (27.2)

66 (45.2)

2.21 (1.32–3.68)

  1. Notes: OR odds ratio; CI confidence interval
  2. aChi-Square Test or Fisher’s exact test
  3. bReference group
  4. cThere are ethnicity information of 132 athletes