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Table 1 Baseline characteristics of participants

From: Association between trunk pain and lower extremity pain among youth soccer players: a cross-sectional study

  Pain sites
Characteristics Median (IQR) n (%) Back (n = 36) Hip (n = 40) Trunk (n = 68)
Sex
 Female 66 (5.8) 2 (5.6) 1 (2.5) 3 (4.4)
 Male 1073 (94.2) 34 (94.4) 39 (97.5) 65 (95.6)
Age (years) 11.0 (9.0 12.0)
 6–10 564 (49.5) 7 (19.4) 7 (17.5) 13 (19.1)
 11–15 575 (50.5) 29 (80.6) 33 (82.5) 55 (80.9)
BMI (kg/m2) 16.6 (15.5 18.1)
  < 18.5 906 (79.5) 26 (72.2) 29 (72.5) 48 (70.6)
 18.5 to < 25 220 (19.3) 9 (25.0) 11 (27.5) 19 (27.9)
  ≥ 25 13 (1.1) 1 (2.8) 0 (0.0) 1 (1.5)
Height increase (per year) 5.0 (4.0 7.0) 5.0 (3.0 9.5) 5.0 (4.0 8.7) 5.0 (3.5 8.7)
Number of days of training/week (days) 3.0 (2.0 4.0)
  < 3 368 (32.3) 12 (33.3) 9 (22.5) 18 (26.5)
  ≥ 3 771 (67.7) 24 (66.7) 31 (77.5) 50 (73.5)
Practice time/day on weekdays (hr) 2.0 (1.5 2.0)
  < 2 392 (34.4) 12 (33.3) 13 (32.5) 22 (32.4)
  ≥ 2 747 (65.6) 24 (66.7) 27 (67.5) 46 (67.6)
Practice time/day on weekends (hr) 3.0 (2.0 3.0)
  < 3 364 (32.0) 9 (25.0) 10 (25.0) 17 (25.0)
  ≥ 3 775 (68.0) 27 (75.0) 30 (75.0) 51 (75.0)
Competitive levels
 Low 599 (52.6) 17 (47.2) 16 (40.0) 30 (44.1)
 High 540 (47.4) 19 (52.8) 24 (60.0) 38 (55.9)
Frequency of participation in games
 Frequently 725 (63.7) 26 (72.2) 27 (67.5) 48 (70.6)
 Not frequently 414 (36.3) 10 (27.8) 13 (32.5) 20 (29.4)
Previous injuries
 Absence 532 (46.7) 10 (27.8) 7 (17.5) 15 (22.1)
 Presence 541 (47.5) 25 (69.4) 30 (75.0) 49 (72.1)
 Unknown 66 (5.8) 1 (2.8) 3 (7.5) 4 (5.9)