| Reasons | F1 | F2 | F3 | F4 | F5 | M1 | M2 | M3 | M4 | M5 |
| 1) The decline in hand strength | l | l |
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| 2) The decline in hand coordination ability |
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| l |
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| 3) The decline in finger flexibility |
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| l |
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| 4) Aging |
| l |
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| 5) Poor observation and attention | l |
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| l | l | l |
| 6) Visual impairment |
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| l |
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| 7) Chronic disease | l |
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