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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