Skip to main content

Table 3 Correlations between age, training experience, and body size descriptors (Xi) with variables extracted from dual-energy x-ray absorptiometry (Yi) by type of sport (swimmers and volleyball players)

From: Total and regional bone mineral and tissue composition in female adolescent athletes: comparison between volleyball players and swimmers

 

Correlation (Xi, Yi)

X1: Chronological age

X2: Age at menarche

X3: Years of training

X4: Stature

X5: Body mass

Swimming (n=20)

Volleyball (n=26)

Swimming (n=20)

Volleyball (n=26)

Swimming (n=20)

Volleyball (n=26)

Swimming (n=20)

Volleyball (n=26)

Swimming (n=20)

Volleyball (n=26)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

r (95%CI)

Bone mineral content (g)

 Y1: Whole body

0.51* (0.11; 0.76)

0.20 (-0.14; 0.55)

0.11 (-0.31; 0.46)

0.18 (-0.25; 0.49)

0.31 (-0.05; 0.64)

0.19 (-0.23; 0.65)

0.81** (0.53; 0.92)

0.32 (-0.21; 0.63)

0.85** (0.69; 0.94)

0.71** (0.32; 0.87)

 Y2: Subhead

0.53* (0.14; 0.78)

0.16 (-0.14; 0.52)

0.14 (-0.30; 0.49)

0.19 (-0.23; 0.50)

0.31 (-0.05; 0.65)

0.18 (-0.24; 0.65)

0.82** (0.57; 0.93)

0.35 (-0.17; 0.64)

0.87** (0.71; 0.95)

0.73** (0.33; 0.89)

 Y3: Trunk

0.48* (0.06; 0.75)

0.11 (-0.24; 0.49)

0.14 (-0.33; 0.48)

0.12 (-0.24; 0.49)

0.26 (-0.10; 0.61)

0.14 (-0.26; 0.60)

0.82** (0.56; 0.92)

0.26 (-0.35; 0.61)

0.86** (0.71; 0.93)

0.76** (0.34; 0.88)

 Y4: Upper limbs

0.59** (0.25; 0.82)

0.14 (-0.13; 0.46)

0.15 (-0.36; 0.56)

0.11 (-0.39; 0.52)

0.49* (0.08; 0.74)

0.28 (-0.12; 0.67)

0.64** (0.38; 0.81)

0.25 (-0.25; 0.58)

0.76** (0.57; 0.90)

0.48* (0.01; 0.75)

 Y5: Lower limbs

0.52* (0.15; 0.78)

0.22 (-0.05; 0.53)

0.11 (-0.28; 0.49)

0.27 (-0.14; 0.57)

0.29 (-0.09; 0.62)

0.17 (-0.25; 0.65)

0.80** (0.52; 0.92)

0.46* (0.07; 0.70)

0.82** (0.64; 0.93)

0.68** (0.29; 0.86)

Bone mineral density (g∙cm-2)

 Y6: Whole body

0.46* (0.06; 0.75)

0.21 (-0.24; 0.62)

-0.03 (-0.35; 0.31)

0.19 (-0.29; 0.53)

0.33 (-0.11; 0.69)

0.36 (-0.05; 0.72)

0.63** (0.22; 0.83)

0.01 (-0.47; 0.41)

0.67** (0.36; 0.86)

0.41* (0.01; 0.69)

 Y7: Subhead

0.50* (0.11; 0.80)

0.13 (-0.28; 0.56)

0.04 (-0.29; 0.39)

0.21 (-0.26; 0.56)

0.31 (-0.17; 0.69)

0.37 (-0.04; 0.75)

0.66** (0.30; 0.86)

0.10 (-0.41; 0.47)

0.70** (0.43; 0.87)

0.49* (0.06; 0.75)

 Y8: Trunk

0.52* (0.09; 0.80)

0.08 (-0.30; 0.50)

0.08 (-0.30; 0.39)

0.09 (-0.40; 0.46)

0.28 (-0.20; 0.68)

0.36 (-0.06; 0.74)

0.65** (0.26; 0.85)

0.04 (-0.50; 0.46)

0.69** (0.42; 0.85)

0.57** (0.10; 0.77)

 Y9: Upper limbs

0.51* (0.17; 0.73)

0.08 (-0.42; 0.54)

-0.07 (-0.44; 0.30)

0.33 (-0.28; 0.71)

0.45* (0.05; 0.71)

0.21 (-0.11; 0.56)

0.57** (0.26; 0.79)

-0.23 (-0.63; 0.13)

0.67** (0.39; 0.91)

0.24 (-0.16; 0.58)

 Y10: Lower limbs

0.40 (0.01; 0.81)

0.13 (-0.27; 0.53)

0.01 (-0.35; 0.44)

0.20 (-0.21; 0.54)

0.27 (-0.21; 0.68)

0.43* (-0.03; 0.77)

0.59** (0.28; 0.81)

0.19 (-0.34; 0.55)

0.63** (0.34; 0.83)

0.37 (-0.13; 0.72)

Lean soft tissue (kg)

 Y11: Whole body

0.18 (-0.32; 0.54)

0.30 (-0.02; 0.61)

0.08 (-0.58; 0.56)

0.38 (0.07; 0.65)

0.02 (-0.38; 0.38)

0.38 (0.02; 0.66)

0.52* (0.05; 0.79)

0.63** (0.40; 0.88)

0.46* (0.07; 0.72)

0.42* (0.01; 0.67)

 Y12: Trunk

-0.05 (-0.57; 0.41)

0.29 (-0.13; 0.62)

0.08 (-0.53; 0.54)

0.34 (0.04; 0.69)

-0.08 (-0.45; 0.36)

0.37 (0.09; 0.62)

0.21 (-0.46; 0.71)

0.64** (0.44; 0.80)

0.20 (-0.41; 0.63)

0.32 (-0.11; 0.60)

 Y13: Upper limbs

0.41 (-0.04; 0.69)

0.14 (-0.15; 0.45)

0.12 (-0.48; 0.54)

0.13 (-0.27; 0.50)

0.33 (-0.08; 0.65)

0.30 (-0.06; 0.62)

0.31 (0.01; 0.62)

0.17 (-0.23; 0.57)

0.51* (0.17; 0.74)

0.41* (-0.06; 0.70)

 Y14: Lower limbs

0.19 (-0.34; 0.61)

0.30 (0.02; 0.57)

0.26 (-0.20; 0.67)

0.40* (-0.02; 0.70)

-0.08 (0.47; 0.29)

0.24 (-0.16; 0.58)

0.70** (0.36; 0.88)

0.61** (0.35; 0.79)

0.56** (0.22; 0.77)

0.41* (0.03; 0.67)

Fat tissue (kg)

 Y15: Whole body

0.48* (0.01; 0.75)

0.04 (-0.24; 0.37)

0.06 (-0.45; 0.53)

-0.02 (-0.27; 0.22)

0.41 (0.09; 0.70)

-0.06 (-0.57; 0.38)

0.41 (-0.15; 0.78)

0.14 (-0.38; 0.51)

0.84** (0.61; 0.95)

0.94** (0.77; 0.97)

 Y16: Trunk

0.48* (0.03; 0.74)

0.08 (-0.21; 0.39)

0.04 (-0.47; 0.51)

-0.02 (-0.24; 0.21)

0.44 (0.15; 0.72)

-0.07 (-0.55; 0.35)

0.43 (-0.12; 0.78)

0.15 (-0.39; 0.52)

0.85** (0.63; 0.95)

0.93** (0.74; 0.97)

 Y17: Upper limbs

0.38 (0.01; 0.81)

-0.05 (-0.36; 0.27)

0.20 (-0.24; 0.53)

-0.04 (-0.35; 0.20)

0.49* (0.35; 0.72)

-0.01 (-0.59; 0.42)

-0.27 (-0.66; 0.63)

0.17 (-0.30; 0.50)

0.05 (-0.46; 0.84)

0.86** (0.60; 0.94)

 Y18: Lower limbs

0.46* (0.05; 0.74)

0.02 (-0.26; 0.34)

0.16 (-0.33; 0.63)

-0.01 (-0.32; 0.27)

0.52* (0.15; 0.83)

-0.03 (-0.55; 0.38)

0.23 (-0.26; 0.64)

0.11 (-0.36; 0.47)

0.53 (0.03; 0.82)

0.88** (0.67; 0.95)

  1. r correlation coefficients, 95%CI 95% confidence intervals
  2. *p < 0.05, **p < 0.01