Grip strength | Experimental group (n = 1020) | χ2 | Control group (n = 1112) | χ2 | χ2 | |||
a1) | b2) | a3) | b4) | 1) 3) | 2) 4) | |||
Qualified | 414 | 449 | 2.460 | 450 | 469 | 0.669 | 0.003 | 0.737 |
Unqualified | 606 | 571 | 662 | 643 |