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Table 3 Pearson correlation coefficients between body mass index, body fat mass index, fat-free mass index, and percentage of body fat in young male rugby players

From: A Cross-Sectional Study Assessing the Contributions of Body Fat Mass and Fat-Free Mass to Body Mass Index Scores in Male Youth Rugby Players

	BFMI (kg m⁻²)	FFMI (kg m⁻²)	%BF
Under 11 years
Overall	0.96***	0.94***	0.87***
Normal-weight	0.75***	0.66***	0.64***
Overweight/obese	0.89***	0.34**	0.74***
Under 13 years
Overall	0.91***	0.90***	0.79***
Normal-weight	0.85***	0.86***	0.66***
Overweight/obese	0.81***	0.72***	0.35**
Under 15 years
Overall	0.95***	0.93***	0.82***
Normal-weight	0.71***	0.75***	0.54***
Overweight/obese	0.92***	0.90***	0.69***

BFMI body fat mass index, FFMI fat-free mass index, %BF percentage of body fat
**p < 0.01; ***p < 0.001

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