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Table 1 Descriptive statistics and correlations between chronovariables, size and echocardiograph parameters (n = 228)

From: Scaling left ventricular mass in adolescent female soccer players

Variable unit descriptive statistics normality (Kolmogorov-Smirnov) correlations
range (min; max) mean standard deviation f CA SA training experience
value (95% CI) value p r p r p r p
Training experience years (2; 9) 5.3 (5.0 to 5.5) 2.1   0.149 < 0.01       
Chronological age years (11.84; 17.05) 14.63 (14.49 to 14.77) 1.11   0.076 < 0.01       
Skeletal agea years (11.46; 17.92) 15.28 (15.04 to 15.53) 1.54   0.067 0.07       
Skeletal maturity:               
 delayed f      25         
 average f      51         
 advanced f      87         
 mature f      65         
Stature cm (136.0; 182.2) 161.3 (160.4 to 162.2) 6.8   0.056 0.08 0.192 < 0.05 0.241 < 0.01   
Body surface area m2 (1.07; 2.05) 1.59 (1.57 to 1.61) 0.2   0.057 0.07 0.209 < 0.01 0.413 < 0.01   
Body mass kg (29.5; 101.0) 56.7 (55.2 to 58.1) 11.0   0.090 < 0.01 0.176 < 0.01 0.405 < 0.01   
Fat mass % (7.5; 51.6) 25.4 (24.4 to 26.4) 7.7   0.075 < 0.01    0.230 < 0.01 −0.148 < 0.05
  kg (3.3; 51.4) 15.0 (14.0 to 16.0) 7.5   0.165 < 0.01    0.292 < 0.01   
Fat-free mass kg (26.2; 62.5) 41.7 (40.9 to 42.5) 5.8   0.051 0.20 0.213 < 0.01 0.391 < 0.01   
LVIDd mm (28.9; 56.1) 45.2 (44.7 to 45.7) 3.6   0.077 < 0.01    0.242 < 0.01   
ISWTd mm (5.4; 10.2) 7.7 (7.6 to 7.8) 0.9   0.064 0.03    0.203 < 0.01 0.288 < 0.01
PWTd mm (5.0; 9.6) 7.5 (7.4 to 7.6) 0.8   0.097 < 0.01      0.249 < 0.01
LVM g (50; 185) 107 (104 to 110) 22   0.049 0.20 0.131 < 0.05 0.274 < 0.01 0.222 < 0.01
LVM index g.m−2 (33; 107) 67 (66 to 69) 11   0.023 0.20      0.286 < 0.01
  1. CA Chronological age, SA Skeletal age, f frequency, LVIDd Left ventricular internal dimension at end of the diastole, ISWTd Interventricular septal wall thickness at end of the diastole, PWTd Posterior wall thickness at end of the diastole, LVM Left ventricular mass, LV index Left ventricular mass index = LVM / body surface area, f Absolute frequency, 95% CI (95% confidence intervals)
  2. an = 163; players classified as skeletally mature (n = 65) were not considered in the analysis