Sedentary behaviours and its association with bone mass in adolescents: the HELENA cross-sectional study

Gracia-Marco, Luis; Rey-López, Juan P; Santaliestra-Pasías, Alba M; Jiménez-Pavón, David; Díaz, Ligia E; Moreno, Luis A; Vicente-Rodríguez, German

doi:10.1186/1471-2458-12-971

BMC Public Health

Table 4 Linear regression analysis for femoral neck bone mineral content as regards to sedentary behaviours

From: Sedentary behaviours and its association with bone mass in adolescents: the HELENA cross-sectional study

Boys (n=178)				Girls (n=181)
*Model 1: Adjusted by height and sexual maturation*
Sedentary behaviours ^†	β ^a	Partial Corr ^b	p	β ^a	Partial Corr ^b	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 + MVPA ^e
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).
^a β is the estimated standardized regression coefficient.
^b Partial correlation.
^c Square-root transformed data.
^d Log-transformed data.
^e Moderate to vigorous physical activity.

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ISSN: 1471-2458

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