Table 4

Linear regression analysis for femoral neck bone mineral content as regards to sedentary behaviours
Boys (n=178) Girls (n=181)
Model 1: Adjusted by height and sexual maturation
Sedentary behaviours βa Partial Corrb p βa Partial Corrb P
TV viewing c −0.066 −0.077 0.301 −0.039 −0.045 0.561
Use of computer games c 0.037 0.043 0.577 −0.086 −0.099 0.203
Use of console games d 0.041 0.052 0.553 −0.130 −0.156 0.313
Use of internet for non-study d −0.071 −0.084 0.320 −0.016 −0.019 0.822
Use of internet for study d −0.073 −0.082 0.361 −0.053 −0.062 0.466
Time of study c −0.085 −0.099 0.194 −0.190 −0.221 0.004
Total sedentary time d −0.097 −0.126 0.107 −0.172 −0.201 0.011
Model 2: Model 1 + lean mass
TV viewing c −0.018 −0.026 0.738 −0.063 −0.081 0.294
Use of computer games c −0.025 −0.035 0.645 −0.090 −0.117 0.133
Use of console games d 0.084 0.120 0.176 −0.069 −0.088 0.574
Use of internet for non-study d −0.076 −0.110 0.196 −0.025 −0.033 0.691
Use of internet for study d −0.077 −0.110 0.224 −0.022 −0.028 0.738
Time of study c 0.000 0.000 0.997 −0.119 −0.152 0.049
Total sedentary time d −0.043 −0.061 0.435 −0.113 −0.150 0.058
Model 3: Model 2 + MVPAe
TV viewing c −0.021 −0.030 0.695 −0.063 −0.081 0.296
Use of computer games c −0.026 −0.038 0.577 −0.090 −0.117 0.134
Use of console games d 0.083 0.118 0.183 −0.042 −0.051 0.749
Use of internet for non-study d −0.076 −0.110 0.197 −0.026 −0.034 0.683
Use of internet for study d −0.077 −0.108 0.230 −0.024 −0.032 0.712
Time of study c 0.000 0.000 0.999 −0.119 −0.152 0.049
Total sedentary time d −0.045 −0.064 0.413 −0.115 −0.152 0.056

Significant results are in bold.

All sedentary behaviours represent the average of the whole week (min/day).

aβ is the estimated standardized regression coefficient.

b Partial correlation.

c Square-root transformed data.

d Log-transformed data.

e Moderate to vigorous physical activity.

Gracia-Marco et al.

Gracia-Marco et al. BMC Public Health 2012 12:971   doi:10.1186/1471-2458-12-971

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