---
title: "hand_dominance"
description: "Hand dominance is an individual's natural preference for a specific hand for performing various motor tasks."
---

Hand dominance is an individual's natural preference for a specific hand for performing various motor tasks.

**Purpose.** To record an individual's natural preference for using a specific hand for various motor tasks.

## Source

| Model | Leg | Role |
|---|---|---|
| `openEHR-EHR-EVALUATION.hand_dominance.v0` | openEHR | defines this table |

## Columns

| Column | Type | Null | Description | Source |
|---|---|---|---|---|
| `id` | `uuid primary key` | no | Primary key. | — |
| `form_id` | `uuid` → [`form`](/docs/tables/form) | no | The form this entry was recorded on. | — |
| `form_block_id` | `uuid` | yes | The block within the form, when the entry is bound to one. | — |
| `dominant_hand`<br />`dominant_hand_code`<br />`dominant_hand_system`<br />`dominant_hand_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Dominant hand | `/data[at0001]/items[at0002]` |
| `comment` | `text` | yes | Comment | `/data[at0001]/items[at0013]` |
| `assessment_method` | `text` | yes | Assessment method | `/protocol[at0014]/items[at0016]` |
| `last_updated` | `timestamptz` | yes | Last updated | `/protocol[at0014]/items[at0023]` |

## Constraints

```sql
check ((dominant_hand_code is null and dominant_hand_system is null and dominant_hand_valueset_id is null) or (dominant_hand is not null and dominant_hand_code is not null and dominant_hand_system is not null and dominant_hand_valueset_id is not null))
```

## Unique

- `form_block_id`

## References

| Columns | Target | On delete |
|---|---|---|
| `form_id` | [`form`](/docs/tables/form) | cascade |
| `form_id, form_block_id` | [`form_block`](/docs/tables/form_block) | cascade |
| `dominant_hand_valueset_id, dominant_hand_code, dominant_hand_system, dominant_hand` | [`valueset_code`](/docs/tables/valueset_code) | restrict |

## Indexes

- `hand_dominance_form_id_idx` on `form_id`

## Value sets

| Value set | Codes |
|---|---|
| `org.openehr::openEHR-EHR-EVALUATION.hand_dominance.v0/dominant_hand` | 4 |