Apple HealthKitV2 Characteristics Export Format

HealthKit Characteristics represent data that does not typically change over time, like date of birth.

One file will be created per type of data (e.g., "BloodType" and "DateOfBirth"). The file name will correspond to the type of data (e.g., "HealthKitV2Characteristics_BloodType_20211101-20211217" and "HealthKitV2Characteristics_DateOfBirth_20211101-20211217").

Data Fields

If a participant re-syncs their device, you may observe duplicate samples. HealthKit samples are immutable, so when doing data analysis, your team will need to remove any samples that have the same HealthKitCharacteristicKey and ParticipantIdentifier as another sample.

Sample CSV Export

HealthKitCharacteristicKey,ParticipantIdentifier,Date,Value,InsertedDate
8d5828fa-4f12-5cc7-bbb8-60f5b84993ac,256263d8-3ffc-eb11-aaae-0afb9334277d,2021-12-14T11:38:43-05:00,BPositive,2021-12-14T16:38:43Z
456c5a90-6031-5400-9123-de8e4a52dc71,a1098476-a16c-4ee9-802e-5153fed5c221,2021-11-22T14:48:06-05:00,BPositive,2021-11-22T19:48:06Z
ac70ee62-80a7-594d-aae8-86be48053965,e794c47e-438e-4d7b-9b24-99ce68c75300,2021-11-05T10:21:03-04:00,BPositive,2021-11-05T14:21:03Z

Sample JSON Export

{
 "HealthKitCharacteristicKey":"8d5828fa-4f12-5cc7-bbb8-60f5b84993ac",
 "ParticipantIdentifier":"256263d8-3ffc-eb11-aaae-0afb9334277d",
 "Value":"BPositive",
 "Date":"2021-12-14T11:38:43-05:00",
 "InsertedDate":"2021-12-14T16:38:43Z"
}