Table 4 Joint effects on frailty by different combinations of physical activity level and sitting time

Vigorous physical activity

<  4 h/d

1 (Ref.)

4-6 h/d

1.840 (0.642,5.278)

0.257

6-8 h/d

3.139 (0.961,10.253)

0.058

≥ 8 h/d

5.228 (1.644,16.628)

0.005

Moderate physical activity

< 4 h/d

2.129 (0.918,4.942)

0.078

4-6 h/d

2.935 (1.264,6.814)

0.012

6-8 h/d

2.964 (1.226,7.164)

0.016

≥ 8 h/d

6.498 (2.525,16.720)

< 0.0001

Light physical activity

< 4 h/d

4.432 (1.706,11.513)

0.002

4-6 h/d

5.407 (2.090,13.986)

0.001

6-8 h/d

2.693 (0.899,8.068)

0.077

≥ 8 h/d

8.223 (3.073,28.012)

< 0.0001