Table 2b.
The relationship of rate of torque development or isometric knee extension peak torque with physical function tests in women
| Women | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 4 | |||||||||||||
| RTDa | ISOM | RTDa | ISOM | RTDa | ISOM | |||||||||||
| β | P value | R 2 | β | P value | R 2 | β | P value | β | P value | R 2 | β | P value | β | P value | R 2 | |
| 400 m walk (s) (n = 260) | −0.20 | <0.0001 | 0.51 | −0.30 | <0.0001 | 0.54 | −0.05 | 0.39 | −0.27 | <0.0001 | 0.54 | −0.06 | 0.33 | −0.23 | 0.001 | 0.54 |
| 2.5 min walk (m) (n = 252) | 0.16 | 0.01 | 0.29 | 0.21 | 0.001 | 0.30 | 0.07 | 0.34 | 0.16 | 0.048 | 0.30 | 0.07 | 0.37 | 0.15 | 0.08 | 0.30 |
| 6 m fast (m/s) (n = 375) | 0.22 | <0.0001 | 0.48 | 0.25 | <0.0001 | 0.48 | 0.12 | 0.01 | 0.16 | 0.003 | 0.49 | 0.13 | 0.01 | 0.13 | 0.03 | 0.50 |
| 6 m usual (m/s) (n = 376) | 0.13 | 0.01 | 0.29 | 0.13 | 0.01 | 0.29 | 0.08 | 0.16 | 0.08 | 0.22 | 0.29 | 0.09 | 0.13 | 0.05 | 0.47 | 0.30 |
| HABCPPB (n = 372) | 0.12 | 0.01 | 0.35 | 0.14 | 0.01 | 0.35 | 0.07 | 0.20 | 0.09 | 0.16 | 0.36 | 0.07 | 0.24 | 0.11 | 0.09 | 0.36 |
| Chair stand test (times/s) | ||||||||||||||||
| CS5pace (times/s) (n = 378) | 0.10 | 0.047 | 0.20 | 0.13 | 0.02 | 0.20 | 0.04 | 0.49 | 0.10 | 0.15 | 0.20 | 0.02 | 0.69 | 0.18 | 0.01 | 0.27 |
| CS10pace (times/s) (n = 375) | 0.11 | 0.03 | 0.25 | 0.17 | 0.002 | 0.26 | 0.03 | 0.68 | 0.15 | 0.02 | 0.26 | 0.00 | 0.97 | 0.25 | 0.0003 | 0.33 |
| SPPB (n = 375) | 0.09 | 0.09 | 0.18 | 0.10 | 0.08 | 0.18 | 0.05 | 0.42 | 0.06 | 0.38 | 0.19 | 0.04 | 0.51 | 0.10 | 0.19 | 0.20 |
CS5pace, chair stands per second for five stands; CS10pace, chair stands per second for 10 stands; HABCPPB, health ABC physical performance battery; ISOM, peak torque (Nm) measured by isometric knee extension strength at 120 deg; RTD, rate of torque development; SPPB, short physical performance battery; 2.5 min walk, the distance covered by 2.5 min walk at usual pace; 400 m walk, time to complete 400 m walk at fast pace; 6 m fast, gait speed at fast pace in 6 m; 6 m usual, gait speed at usual pace in 6 m.
log transformed. All models, P < 0.0001.
Values are standardized regression coefficient from generalized linear regression models. In each physical performance test, Models 1 and 2 were adjusted for age, race, and body mass index. Model 3 was adjusted for variables in Model 1 + ISOM. Model 4 was adjusted for variables in Model 3 + appendicular lean mass and whole body fat free mass.