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# bloodPressure

A correlation sample that combines a systolic sample and a diastolic sample into a single blood pressure reading.

```
static let bloodPressure: HKCorrelationTypeIdentifier
```

## See Also

[`HKCorrelationTypeIdentifier`](/documentation/HealthKit/HKCorrelationTypeIdentifier)

The identifiers that create correlation type objects.

[`HKCorrelationType`](/documentation/HealthKit/HKCorrelationType)

A type that identifies samples that group multiple subsamples.

[`HKCorrelation`](/documentation/HealthKit/HKCorrelation)

A sample that groups multiple related samples into a single entry.


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