---
title: "waist_circumference"
description: "The measurement of the distance around the waist."
---

The measurement of the distance around the waist.

**Purpose.** To record the measurement of the circumference of the waist.

## Source

| Model | Leg | Role |
|---|---|---|
| `openEHR-EHR-OBSERVATION.waist_circumference.v1` | 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. | — |
| `waist_circumference_magnitude`<br />`waist_circumference_units` | quantity<br />`numeric`, `text` | yes | Waist circumference | `/data[at0001]/events[at0010]/data[at0003]/items[at0004]` |
| `comment` | `text` | yes | Comment | `/data[at0001]/events[at0010]/data[at0003]/items[at0007]` |
| `confounding_factors` | `text` | yes | Confounding factors | `/data[at0001]/events[at0010]/state[at0008]/items[at0009]` |
| `method`<br />`method_code`<br />`method_system`<br />`method_valueset_id` | coded text<br />`text`, `text`, `text`, `text` | yes | Method | `/protocol[at0005]/items[at0013]` |
| `device` | `uuid` | yes | Device | `/protocol[at0005]/items[at0006]` |

## Constraints

```sql
check ((waist_circumference_magnitude is null and waist_circumference_units is null) or (waist_circumference_magnitude is not null and waist_circumference_units is not null))
check (waist_circumference_magnitude is null or (waist_circumference_units = 'cm' and waist_circumference_magnitude between 0 and 500) or (waist_circumference_units = '[in_i]' and waist_circumference_magnitude between 0 and 400))
check ((method_code is null and method_system is null and method_valueset_id is null) or (method is not null and method_code is not null and method_system is not null and method_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 |
| `method_valueset_id, method_code, method_system, method` | [`valueset_code`](/docs/tables/valueset_code) | restrict |
| `device` | [`device`](/docs/tables/device) | no action |

## Indexes

- `waist_circumference_form_id_idx` on `form_id`
- `waist_circumference_device_idx` on `device`