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HES Data Dictionary
| HES field name | Age at activity date | ||||
|---|---|---|---|---|---|
| Field | activage | ||||
| Class | Patient | ||||
| Length and format | 3n | ||||
| Availability | 2007-08, Quarter 3 onwards | ||||
| Description | |||||
| The patient's age, in years, at the time of activity, such as admission, discharge or birth. | |||||
| Value | |||||
3n = age at activity date 999 = Not known, ie date of birth not known and age cannot be estimated. |
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| Data cleaning |
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