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Table 3 Association between moderate and vigorous-intensity physical activity at 11, 15 and 18 years with body fat mass and lean mass index at 18 years in boys and girls belonging to the 1993 Pelotas (Brazil) Birth Cohort

From: Physical activity throughout adolescence and body composition at 18 years: 1993 Pelotas (Brazil) birth cohort study

Physical Activity Intensity in Tertiles Fat Mass Index (FMI) Lean Mass Index (LMI)
N Boys n Girls n Boys N Girls
β (95 % CI) P β (95 % CI) p β (95 % CI) p β (95 % CI) P
Moderate-intensity physical activity at 11y 1782   0.7 1842   0.3 1782   0.003 1842   0.005
 1st 724 0   590 0   724 0   590 0  
 2nd 548 -0.14 (-0.48; 0.20)   577 0.00 (-0.42; 0.40)   548 0.13 (-0.04; 0.29)   577 0.11 (-0.06; 0.28)  
 3rd 510 -0.01 (-0.36; 0.33)   675 0.27 (-0.13; 0.66)   510 0.30 (0.13; 0.48)   675 0.26 (0.10; 0.43)  
Vigorous-intensity physical activity at 11y 1780   0.4 1843   0.6 1780   0.4 1843   0.008
 1st 413 0   1231 0   413 0   1231 0  
 2nd 485 -0.07 (-0.48; 0.33)   369 -0.14 (-0.56; 0.27)   485 0.09 (-0.11; 0.29)   369 0.06 (-0.11; 0.23)  
 3rd 882 -0.23 (-0.59; 0.13)   243 -0.20 (-0.70; 0.28)   882 0.12 (-0.07; 0.30)   243 0.32 (0.12; 0.52)  
Moderate-intensity physical activity at 15y 1796   0.6 1914   0.2 1796   0.008 1914   <0.001
 1st 681 0   553 0   681 0   553 0  
 2nd 609 -0.18 (-0.51; 0.16)   631 0.18 (-0.22; 0.59)   609 -0.08 (-0.25; 0.08)   631 0.15 (-0.01; 0.31)  
 3rd 506 -0.03 (-0.39; 0.32)   730 0.36 (-0.03; 0.75)   506 0.20 (0.02; 0.38)   730 0.31 (0.15; 0.47)  
Vigorous-intensity physical activity at 15y 1796   0.001 1914   0.2 1796   <0.001 1914   0.02
 1st 436 0   1533 0   436 0   1533 0  
 2nd 390 -0.50 (-0.92; -0.09)   223 0.07 (-0.43; 0.57)   390 0.28 (0.07; 0.49)   223 0.22 (0.02; 0.42)  
 3rd 970 -0.65 (-1.00; -0.30)   158 -0.50 (-1.09; 0.07)   970 0.50 (0.34; 0.68)   158 0.23 (0.00; 0.46)  
Moderate-intensity physical activity at 18y 1901   0.001 1949   0.07 1901   0.03 1949   <0.001
 1st 500 0   779 0   500 0   779 0  
 2nd 642 -0.08 (-0.43; 0.28)   658 0.27 (-0.09; 0.64)   642 0.12 (-0.06; 0.30)   658 0.27 (0.12; 0.42)  
 3rd 759 -0.56 (-0.90; -0.21)   512 0.45 (0.05; 0.84)   759 0.24 (0.06; 0.41)   512 0.50 (0.34; 0.66)  
Vigorous-intensity physical activity at 18y 1899   0.4 1949   0.3 1899   <0.001 1949   <0.001
 1st 786 0   1459 0   786 0   1459 0  
 2nd 209 0.30 (-0.15; 0.77)   101 0.21 (-0.50; 0.93)   209 0.10 (-0.13; 0.34)   101 0.36 (0.07; 0.65)  
 3rd 904 0.10 (-0.19; 0.39)   389 0.29 (-0.11; 0.69)   904 0.46 (0.30; 0.60)   389 0.34 (0.18; 0.50)  
  1. Wald test for heterogeneity