Table 3 Multivariate association between sedentary behaviours and femoral BMC in women

Model 1

0.655

Model adjusted for age (β = 0.377)^***, age of first menstrual cycle (β = −0.236)^***, BMI (β = 0.377)^*** and Ethnicity (β = 0.086)^***

Objective sedentary time

0.000

0.21 (−3.67 to 4.19)

0.003

Time spent watching TV

0.003 ^*

−0.28 (−0.50 to −0.06) ^*

−0.057

Time spent on computer

0.000

−0.18 (−0.54 to 0.19)

−0.022

Total screen time

0.004 ^**

−0.80 (−1.35 to −0.25) ^**

−0.066

Total non-screen SB

0.004 ^**

0.15 (0.04 to 0.26) ^**

0.063

α

0.001

−1.41 (−3.28 to 0.47)

−0.038

Model 2

0.662

Model 1 adjusted for objectively measured MVPA (β = 0.130)^***

Objective sedentary time

0.005 ^***

8.07 (3.18 to 12.97) ^***

0.113

Time spent watching TV

0.003 ^*

- 0.26 (−0.48 to −0.05) ^*

−0.055

Time spent on computer

0.000

−0.16 (−0.52 to 0.20)

−0.020

Total screen time

0.004 ^**

−0.77 (−1.31 to −0.22) ^**

−0.063

Total non-screen SB

0.006 ^**

0.327 (0.141 to 0.513) ^**

0.095

α

0.007 ^***

−4.05 (−6.18 to −1.92) ^***

−0.109

Model 3

0.415

Model 1 adjusted for weekly frequency of strengthening exercise (β = 0.173)^***

Objective sedentary time

0.002

−3.21 (−8.25 to 1.81)

−0.049

Time spent watching TV

0.009 ^*

− 0.33 (−0.59 to −0.07) ^*

−0.095

Time spent on computer

0.000

−0.10 (−0.56 to 0.35)

−0.017

Total screen time

0.009 ^*

−0.86 (−1.54 to −0.17) ^*

−0.095

Total non-screen SB

0.004

0.11 (−0.02 to 0.25)

0.064

α

0.000

0.842 (−1.72 to 3.41)

0.025

Model 4

0.577

Model 1 adjusted for weekly frequency of vigorous playing or exercise (β = 0.140)^**

Objective sedentary time

0.003

−3.15 (−7.85 to 1.55)

−0.061

Time spent watching TV

0.004

0.23 (−0.11 to 0.55)

0.065

Time spent on computer

0.000

−0.03 (−0.47 to 0.41)

−0.006

Total screen time

0.001

0.26 (−0.45 to 0.97)

0.034

Total non-screen time SB

0.000

−0.08 (−0.23 to 0.07)

−0.048

α

0.000

−0.513(−1.59 to 2.61)

0.022