Table 4.
Convergent validity of the proposed cut-points for weakness with markers of physical performance
| Definition | Present weak-ness | N | Gait speed (m/sec), mean (SD) | P value |
Low gait speed < 1.0 m/s (n, %) |
P value |
Low gait speed < 0.8 m/s (n, %) |
P value | 5TSTS (sec), mean (SD) | P value |
5TSTS > 11.19 s (n, %) |
P value | Present sarcopenia (n, %) | P value | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dominant hand | Below median of lowest 20% | yes | 93 | 1.02 (0.21) | < .001 | 43 (46.24) | < .001 | 14 (15.05) | 0.004 | 11.94 (3.43) | 0.001 | 47 (51.65) | 0.003 | 13 (21.67) | 0.03 |
| no | 911 | 1.11 (0.21) | 264 (28.98) | 61 (6.70) | 10.68 (2.92) | 325 (35.91) | 58 (11.81) | ||||||||
| Upper limit of lowest quintile | yes | 194 | 1.03 (0.21) | < .001 | 81 (41.75) | < .001 | 29 (14.95) | < .001 | 11.82 (3.57) | < .001 | 92 (49.20) | < .001 | 24 (18.75) | 0.02 | |
| no | 807 | 1.12 (0.21) | 223 (27.63) | 46 (5.70) | 10.54 (2.78) | 269 (34.53) | 46 (11.06) | ||||||||
| Below -2 SD of mean | yes | 37 | 0.99 (0.19) | < .001 | 19 (51.35) | 0.005 | 6 (16.22) | 0.05 | 12.29 (3.23) | 0.002 | 20 (55.56) | 0.02 | 6 (25.00) | 0.11 | |
| no | 967 | 1.11 (0.22) | 288 (29.78) | 69 (7.14) | 10.74 (2.97) | 352 (36.67) | 65 (12.33) | ||||||||
| Below -2.5 SD of mean | yes | 20 | 0.93 (0.15) | < .001 | 14 (70.00) | < .001 | 3 (15.00) | 0.18 | 12.39 (3.30) | 0.02 | 11 (55.00) | 0.10 | 3 (27.27) | 0.16 | |
| no | 984 | 1.11 (0.22) | 293 (29.78) | 72 (7.32) | 10.76 (2.98) | 361 (36.99) | 68 (12.59) | ||||||||
| Non-dominant hand | Below median of lowest 20% | yes | 102 | 1.01 (0.22) | < .001 | 44 (43.14) | 0.004 | 20 (19.61) | < .001 | 11.58 (2.88) | 0.005 | 50 (50.00) | 0.006 | 14 (22.95) | 0.01 |
| no | 902 | 1.11 (0.21) | 263 (29.16) | 55 (6.10) | 10.70 (2.99) | 322 (35.94) | 57 (11.63) | ||||||||
| Upper limit of lowest quintile | yes | 192 | 1.03 (0.23) | < .001 | 82 (42.71) | < .001 | 30 (15.63) | < .001 | 11.54 (3.29) | < .001 | 89 (48.11) | < .001 | 27 (22.31) | < .001 | |
| no | 805 | 1.12 (0.21) | 223 (27.70) | 44 (5.47) | 10.62 (2.90) | 273 (34.91) | 43 (10.26) | ||||||||
| Below -2 SD of mean | yes | 29 | 0.96 (0.17) | < .001 | 17 (58.62) | < .001 | 5 (17.24) | 0.06 | 12.14 (3.03) | 0.02 | 15 (53.57) | 0.07 | 5 (25.00) | 0.16 | |
| no | 975 | 1.11 (0.22) | 290 (29.74) | 70 (7.18) | 10.75 (2.98) | 357 (36.88) | 66 (12.43) | ||||||||
| Below -2.5 SD of mean | yes | 17 | 0.94 (0.15) | 0.002 | 11 (64.71) | 0.002 | 2 (11.76) | 0.37 | 12.53 (3.44) | 0.02 | 10 (58.82) | 0.06 | 2 (25.00) | 0.30 | |
| no | 987 | 1.11 (0.22) | 296 (29.99) | 73 (7.40) | 10.76 (2.98) | 362 (36.98) | 69 (12.71) |