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Table 2 Pearson product moment correlation coefficient matrix among all variables for composite sample of young athletes

From: Sex-specific relationships among iron status biomarkers, athletic performance, maturity, and dietary intakes in pre-adolescent and adolescent athletes

  Age Maturity Offset Height Weight BF% Arm eCSA Thigh eCSA VJ BJ PA LC 20YD PPU Hb Ferritin sTfR Energy Intake Protein Fat Carbohydrate
N pairs 249 249 249 249 244 246 245 246 247 247 245 248 246 128 118 105 97 97 97 97
  M F M F M F M F M F M F M F M F M F M F M F M F M F M F M F M F M F M F M F M F
N pairs 179 70 179 70 179 70 179 70 175 69 176 70 175 70 177 69 178 69 177 70 176 69 178 70 177 69 100 28 94 24 76 29 66 31 66 31 66 31 66 31
Maturity Offset .875a                                       
.946a .972a                                       
Height .837a .802a                                     
.839a .859a .927a .945a                                     
Weight .690a .714a .800a                                   
.669 .682a .841a .779a .812a .748a                                   
BF% −.103 −.034 −.056 .352a                                 
−.260a .333a −.173ac .425a −.166a .378a .250a .775a                                 
Arm eCSA .459a .347a .506a .463a −.388a                               
.507a .386a .550a .430a .519a .398a .416a .639a −.508a .251ac                               
Thigh eCSA .666a .632a .704a .716a −.073 .591a                             
.667a .696a .754a .747a .692a .726a .721a .681a −.140a .245ac .573a .638a                             
VJ .636a .447a .586a .321a −.496a .566a .537a                           
.674a .616a .627a .613a .575a .593a .303a .321a −.585a −.097 .569a .336a .509a .593a                           
BJ .639a .452a .571a .290a −.453a .530a .526a .844a                         
.656a .664a .589a .669a .527a .683a .261a .323a −.544a .083 .558a .225 .499a .564a .878a .663a                         
PA −.635a −.434a −.512a −.184a .496a −.401a −.382a −.820a −.803a                       
−.621a −.716a −.523a −.673a −.465a −.619a −.144b −.249a .608a .069 −.423a −.127 −.323a −.509a −.840a −.713a −.834a −.662a                       
LC −.606a −.410a − 493a −.201a .473a −.433a −.369a −.762a −.748a .920a                     
−.600a −.654a −.505a −.610a −.462a −.545a −.165a −.251a .581a .055 −.462a −.134 −.314a .479a −.761a −.726a −.773a −.612a .926a .885a                     
20YD −.593a −.428a −.485a −.151a .470a −.349a −.345a −.754a −.734a .874a .811a                   
−.569a −.661a −.476a −.619a −.399a −.595a −.100b −.255ac .600a .066 −.386a −.129 −.289a −.471a −.767a −.721a .777a −.600a .885a .847a .843a .709a                   
PPU .585a .478a .598a .660a −.041 .508a .664a .485a .520a −.399a −.396a −.346a                 
.680a .381a .754a .390a .650a .343a .731 .350a −.039 .158 .497a .239a .719a .343a .491a .190 .482a .423a −.397a −.232 −.393a −.216 −.373a −.157                 
Hb .184a .139 .194a .159 −.037 .075 .086 .247a .214a −.230a −.228a −.204a .221a               
.202a .145 .188 .157 .219a .101 .112 .283 −.147 .288 .031 .205 .102 .026 .331a −.002 .277a .037 −.317a .064 −.284a −.034 −.375a .177 .237a .146               
Ferritin −.016 −.027 .099 .252a .278a −.049 −.052 −.137 −.166 .181 .141 .181a .070 .065             
.019 −.011 .045 .081 .063 .195 .246a .345 .323a .257 −.137 .386 −.087 .130 −.201 −.184 −.272a .150 .222a .360 .188 .313 .223a .200 .033 −.034 .000 .606a             
sTfR .009b .099 .050 .061 .005 .048 .046 −.093b −.047 .073b .088b .070b −.011 .033 −.223ac           
.126 −.295 .196 −.240 .132 −.182 .093 −.001 −.067b .200 .125 −.183 .132 −.215 .084 −.562a .068 −.308 −.079 .522a −.092 .649a −.132 .521a −.001 .126 .023 .086 −.262ac .228           
Energy Intake .047 −.054 .088 −.052 −.298a .182 .112 .276a .253a −.266a −.252a −.205a .088 −.080 −.053 −.272a         
.051 .015 .067 −.045 .084 −.041 −.068 −.250 −.281a −.344 .162 −.076 .139 −.084 .263a .188 .187 .240 −.265a −.102 −.186 −.233 −.197 −.146 −.101 −.326 −.133 .040 −.101 .236 −.297 −.278         
Protein .153 .041 .247a .195 −.162 .325a .288a .312a .260a −.237 −.217a −.193b .208ac .017 .131 −.222 .763a       
.251a −.132 .285a −.141 .280b −.46 .202 −.169 −.138 −.232 .295ac .020 .352a −.096 .290a .213 .201 .139 −.213 −.054 −.144 −.142 −.162 −.151 .215 −.326 −.030 .143 .093 .244 −.234 −.198 .789a .577a       
Fat .045 .003 .076 −.039 −.210a .071 .122 .174 .154 −.179 −.140 −.133 .096 −.194 −.117 −.218 .895a .700a     
.035 .056 .061 .002 .080 .002 −.038 −.162 −.198 −.231 .055 −.033 .179 −.103 .164 .148 .112 .174 −.173 −.121 −.093 −.150 −.105 −.143 .130 −.186 −.185 −.238 −.093 −.151 −.195 −.312 .916a .847a .731a .623a     
Carbo-hydrate −.029 −.132 −.011 −.170 −.340a .144 .024 .245a .243a −.253a −.271a −.199b −.018 .010 −.052 −.248b .839a .425a .551a   
−.066 .019 −.071 −.031 .043 −.051 −.222 −.229 −.342a −.324 .139 −.129 −.056 −.024 .249a .120 .180 .222 −.277a −.054 −.219 −.231 −.229 −.080 −.032 −.288 −.094 .237 −.162 .454 −.341a −.125 .852a .781a .469a .114 .614a .357a   
Iron .138 .032 .153 −.029 −.274a .091b .162 .312a .215ac −.220ac −.224ac −.242ac .001 .074 .112 −.240 .414a .348a .271a .440a
.061 .436a .069 .387a .086 .323 −.109 .162 −.264ac −.314 −.011 .363a .072 .535a .225 .565a .078 .568a −.130 −.397a −.177 −.465a −.155 −.466a −.056 −.130 .030 .223 .055 .365 −.217 −.341 .392a .377a .329a .155 .288a .126 .414a .476a
  1. The top row indicates the correlation with all athletes and the bottom row indicates the correlation separated by male (M) on the left side and female (F) on the right side
  2. aCorrelation is significant at the 0.05 level with outliers included; bCorrelation became significant with removal of outliers; cCorrelation became non-significant with removal of outliers