Table 2.
Multivariate association between sedentary behaviours and femoral BMC in men
| Model |
Model R
2
adj
|
B (95% CI) | β a |
|---|---|---|---|
| R 2 change | |||
|
Model 1 |
0.673 |
|
|
| Model adjusted for | |||
| Age (β = 0.704)***, BMI (β = 0.231) ***, Ethnicity (β = 0.101)*** and Vitamin D (β = 0.076)*** | |||
| Objective sedentary time |
0.000 |
−1.09 (−4.66 to 6.76) |
0.009 |
| Time spent watching TV |
0.002
*
|
−0.44 (−0.84 to −0.05)
*
|
−0.053 |
| Time spent on computer |
0.001 |
−0.41 (−0.96 to 0.14) |
−0.035 |
| Total screen time |
0.002
*
|
−0.21 (−0.41 to 0.00)
*
|
−0.046 |
| Total non-screen SB |
0.002 |
0.17 (−0.01 to 0.35) |
0.044 |
| α |
0.000 |
−1.36 (−4.24 to 1.51) |
−0.023 |
|
Model 2 |
0.687 |
|
|
| Model 1 adjusted for objectively measured MVPA (β = 0.144) *** | |||
| Objective sedentary time |
0.009
***
|
15.93 (8.64 to 23.11)
***
|
0.143 |
| Time spent watching TV |
0.002
*
|
- 0.45 (−0.83 to −0.06)
*
|
−0.053 |
| Time spent on computer |
0.000 |
−0.35 (−0.89 to 0.19) |
−0.030 |
| Total screen time |
0.001 |
−0.82 (−1.80 to 0.16) |
−0.039 |
| Total non-screen SB |
0.006
**
|
0.327 (0.141 to 0.513)
**
|
0.095 |
| α |
0.006
***
|
−5.67 (−8.86 to −2.49)
***
|
−0.096 |
|
Model 3 |
0.415 |
|
|
| Model 1 adjusted for weekly frequency of strengthening exercise (β = 0.102) ** | |||
| Objective sedentary time |
0.000 |
−1.26 (−8.37 to 5.85) |
−0.013 |
| Time spent watching TV |
0.002 |
− 0.48 (−0.97 to 0.02) |
−0.071 |
| Time spent on computer |
0.000 |
−0.41 (−1.21 to 0.34) |
−0.038 |
| Total screen time |
0.003 |
−0.90 (−2.19 to 0.38) |
−0.052 |
| Total non-screen SB |
0.001 |
0.13 (−0.11 to 0.36) |
0.038 |
| α |
0.000 |
−0.27 (−0.40 to 0.34) |
−0.005 |
|
Model 4
e
|
0.510 |
|
|
| Model 1 adjusted for weekly frequency of vigorous playing or exercise (β = 0.126)* | |||
| Objective sedentary time |
0.002 |
−3.13 (−9.03 to 2.78) |
−0.061 |
| Time spent watching TV |
0.001 |
0.114 (−0.28 to 0.47) |
0.036 |
| Time spent on computer |
0.004 |
−0.24 (−0.60 to 0.12) |
−0.076 |
| Total screen time |
0.000 |
0.12 (−0.71 to 0.96) |
0.017 |
| Total non-screen time SB |
0.000 |
−0.03(−0.18 to 0.13) |
−0.021 |
| α | 0.000 | −1.88 (−7.15 to 3.40) | −0.08 |
aStandardised regression coefficients.
*Statistically significant predictor of BMC (p <0.05).
**Statistically significant predictor of BMC (p <0.01).
***Statistically significant predictor of BMC (p <0.0001).
Bold text highlights statistically significant associations.