From: Physical performance reference values for Japanese oldest old: a SONIC study
Variables | age | 70 | 80 | 90 | |||
---|---|---|---|---|---|---|---|
 | unable, (%) | difficulty,(%) | unable, (%) | difficulty,(%) | unable, (%) | difficulty,(%) | |
Physical performance measures | |||||||
 Hand grip strength | 16 (1.6) | – | 5 (0.5) | – | 17 (2.1) | – | |
 Usual gait speed | 15 (1.5) | – | 14 (1.4) | – | 54 (6.7) | – | |
 Tandem balance | 2 (0.2) | – | 12 (1.2) | – | 53 (6.6) | – | |
 5times chair stand | 16 (1.6) | 1 a(0.1) | 46 (4.7) | 32 a(3.3) | 158 (19.7) | 168 a(20.9) |