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Table 2 Description of the study sample by class and sex

From: Effect of living area and sports club participation on physical fitness in children: a 4 year longitudinal study

  3rdclass (N = 172) 4thclass (N = 172) 5thclass (N = 172) 6thclass (N = 172)
  Boys (n = 103) Girls (n = 69) Boys (n = 103) Girls (n = 69) Boys (n = 103) Girls (n = 69) Boys (n = 103) Girls (n = 69)
Characteristic         
Age (yr) 9.4 (0.4)* 9.2 (0.4) 10.3 (0.4)* 10.2 (0.4) 11.4 (0.5)* 11.2 (0.3) 12.4 (0.4)* 12.2 (0.4)
Height (cm) 139.8 (5.9)* 136.9 (6.4) 143.6 (6.2)* 141.6 (6.9) 150.0 (6.8) 148.8 (7.7) 156.2 (7.7) 154.9 (7.6)
Mass (kg) 32.0 (5.0) 31.6 (5.9) 35.9 (6.0) 35.9 (7.8) 40.6 (7.4) 40.7 (10.1) 45.7 (8.6) 45.8 (11.2)
BMI (kg/m2) 16.4 (2.1) 16.8 (2.4) 17.4 (2.4) 17.8 (3.0) 18.0 (2.5) 18.2 (3.4) 18.6 (2.6) 19.0 (3.7)
Fitness test         
50-m sprint (s) 9.6 (0.8) 9.9 (0.8) 9.2 (0.8)* 9.5 (0.9) 8.9 (0.8) 9.1 (0.8) 8.7 (0.8) 8.9 (0.8)
1-kg ball push (m) 7.82 (1.4)* 6.33 (1.4) 9.09 (1.6)* 7.61 (1.3) 10.76 (2.0)* 8.93 (1.9) 11.78 (2.3)* 9.8 (2.2)
Triple hop (m) 7.76 (1.2)* 7.30 (1.1) 8.51 (1.2)* 8.04 (1.2) 9.29 (1.3)* 8.81 (1.2) 9.97 (1.4)* 9.5 (1.4)
SaR (cm) 96.5 (7.8)* 100.7 (7.2) 96.6 (8.1)* 100.6 (7.2) 95.3 (8.5)* 101.6 (7.4) 96.0 (8.3)* 103.9 (7.8)
Star run (s) 22.9 (3.3) 23.6 (2.3) 20.8 (2.0)* 21.8 (1.9) 19.5 (2.0)* 20.4 (1.8) 18.6 (1.8)* 19.3 (1.7)
9-min run (m) 1499.5 (193.1)* 1343.4 (168.3) 1587.9 (255.2)* 1417.1 (213.9) 1629.2 (235.9)* 1455.8 (177.9) 1610.4 (254.7)* 1463.3 (229.3)
  1. Notes. Values are means (±SD). *indicates that boys are significantly different from girls (p < 0.05); BMI = Body Mass Index; SaR = stand-and-reach test; star run = star coordination run