Table 3 Interactions between time and physical activity according to grip strength group

Low

Time

wave 4

0.80(0.65–0.95)

< 0.001^*

wave 5

0.84(0.67–1.01)

< 0.001^*

wave 6

0.91(0.75–1.07)

< 0.001^*

wave 7

1.25(1.06–1.45)

< 0.001^*

wave 8

1.13(0.87–1.40)

< 0.001^*

Physical inactivity

Inactivity

0.08(−0.11–0.27)

0.418

Time × Physical inactivity

wave 4 × Inactivity

0.64(0.24–1.05)

0.002^*

wave 5 × Inactivity

0.71(0.28–1.13)

0.001^*

wave 6 × Inactivity

0.78(0.40–1.17)

< 0.001^*

wave 7 × Inactivity

0.61(0.15–1.06)

0.009

wave 8 × Inactivity

0.57(0.05–1.08)

0.030^*

Middle

Time

wave 4

0.53(0.43–0.63)

< 0.001^*

wave 5

0.62(0.51–0.73)

< 0.001^*

wave 6

0.60(0.51–0.70)

< 0.001^*

wave 7

0.73(0.61–0.85)

< 0.001^*

wave 8

0.69(0.56–0.83)

< 0.001^*

Physical inactivity

Inactivity

−0.01(−0.20–0.18)

0.913

Time × Physical inactivity

wave 4 × Inactivity

0.29(−0.08–0.66)

0.124

wave 5 × Inactivity

0.26(−0.13–0.64)

0.197

wave 6 × Inactivity

0.55(0.14–0.95)

0.008^*

wave 7 × Inactivity

0.80(0.39–1.20)

< 0.001^*

wave 8 × Inactivity

0.76(0.29–1.23)

0.001^*

High

Time

wave 4

0.54(0.28–0.80)

< 0.001^*

wave 5

0.43(0.24–0.62)

< 0.001^*

wave 6

0.55(0.31–0.80)

< 0.001^*

wave 7

0.54(0.30–0.78)

< 0.001^*

wave 8

0.53(0.22–0.84)

0.001^*

Physical inactivity

Inactivity

0.16(−0.17–0.49)

0.345

Time × Physical inactivity

wave 4 × Inactivity

0.31(−0.33–0.94)

0.345

wave 5 × Inactivity

0.76(−0.17–1.70)

0.110

wave 6 × Inactivity

0.37(−0.44–1.17)

0.372

wave 7 × Inactivity

−0.11(− 0.67–0.45)

0.704

wave 8 × Inactivity

0.31(−0.43–1.06)

0.409