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| Operating styles | All (n = 1,230) | Sitting (n = 817) | Standing (n = 413) |
|---|---|---|---|
| Both-hand | 270 (22.0) | 195 (23.9) | 75 (18.2) |
| Different-hand | 486 (39.5) | 372 (45.5) | 114 (27.6) |
| Holding with right hand | 35 (2.8) | 24 (2.9) | 11 (2.7) |
| Holding with left hand | 451 (36.7) | 348 (42.6) | 103 (24.9) |
| Same-hand | 369 (30.0) | 180 (22.0) | 189 (45.8) |
| Right hand | 204 (16.6) | 109 (13.3) | 95 (23.0) |
| Left hand | 165 (13.4) | 71 (8.7) | 94 (22.8) |
| Unclassified | 105 (8.5) | 70 (8.6) | 35 (8.5) |
