Understand source data verification
Source Data Verification (SDV) allows you to validate the accuracy of the data collected during the study. The SDV settings allow you to tailor the level of data verification required for a study and site.
Note:
You can verify any type of visible question in a form, except for the Visit Date field.- No SDV required
- Full SDV required
- Targeted SDV required
Tip:
The SDV settings can be updated at any time. This includes changes to make the study require a full, targeted or no SDV. For targeted SDV you can also change the SDV strategy associated with a site and the question-level SDV settings, but these changes are not retroactive and are only applied on new data. For more details, see How do changes in Source Data Verification settings impact a study?.Workflow for defining SDV in your study
Depending on the level of SDV required in your study, the process to configure SDV may involve the following tasks:
Task | Description |
---|---|
Specify settings for Source Data Verification |
As a study manager, you start with defining general
SDV settings at the study level, on the Source Data
Verification tab. This is where you define whether your
study requires:
If your study requires no SDV or full SDV, this is all you have to do to complete the study's SDV configuration. |
Create a source data verification strategy and assign it to a site |
Only if your study uses targeted SDV, must you create an SDV strategy and assign it to a site. In the SDV strategy you define the amount of subjects that are required to be verified, and whether this verification is needed for all questions or only for a specific set of questions (defined in form design). Note: You can create an SDV strategy regardless of the level of SDV used in your study, but it will only become effective for a given site once the strategy is assigned to the site and only in studies using targeted SDV. |
Configure source data verification settings for a question |
Only if your study uses targeted SDV, should you work with your study designer to configure question-level SDV settings in form design and define which questions require verification. Study designers can define questions as critical variables that need to be verified for the targeted SDV subject pool (randomly determined as per the numbers set in the SDV strategy) and also questions that need to be verified for all subjects. These settings are applied according to the SDV strategy. If your SDV strategy dictates verification is needed for specific questions (if it uses the SDV for All Subjects & Critical Variables option), you must complete this step. Note: You can define question-level SDV settings regardless of the level of SDV used in your study, but these will only become effective in studies using targeted SDV and once an SDV strategy is assigned to sites. |
SDV configuration for different use cases
- When no SDV is required in a study
-
In some cases, your study may not require any level of SDV. For example, when you use Oracle Clinical One Platform primarily for randomization and trial supply management. In this use case, the study manager configures the study-level SDV settings to not allow SDV. Given that SDV is not allowed, any SDV strategy or question-level SDV settings are not applied, so you don't need to define them. As a result, the Clinical Research Associate (CRA) doesn't need to verify any data in the study.
Note:
When SDV is turned off in a study, the Verify Data button to perform SDV is not available, even if the user has the appropriate permissions to verify data.SDV settings (in the SDV tab of the study settings) SDV strategy Question-level SDV settings (in form design) - Allow SDV in Study: No
Not required.
Not required.
- When full SDV is required in a study
-
If your study requires verification of all data entered for all subjects, without exception, you need to configure a full SDV. To enable a full SDV, the study manager configures study-level SDV settings for it. In this use case, CRAs must verify all questions (that are not Read-only) for all subjects, so the study manager doesn't need to create any specific SDV strategies, nor is the study designer required to select any specific questions for data verification.
SDV settings (in the SDV tab of the study settings) SDV strategy Question-level SDV settings (in form design) - Allow SDV in Study: Yes
- Amount of SDV: 100%
- Include Screen Failures:
- Select Yes to consider screen failed subjects for data verification.
- Select No to make screen failed subjects to not require any data verification.
Not required.
Not required.
- When targeted SDV is required in a study
-
If your study requires partial SDV, for a targeted amount of subjects or for specific questions only, you need to configure a targeted SDV. A targeted SDV involves the three tasks described in the workflow section: specify study-level settings for SDV, create an SDV strategy and assign it to a site, and configure question-level SDV settings.
- The study manager must configure a Targeted SDV in the study-level SDV settings. Additionally, with the Include Screen Failures and the Allow SDV Overrides settings, you can control the SDV definition at a more granular level.
- Next, study managers must define an SDV strategy
and assign it to sites. This is required to determine the amount
of subjects that will require verification and the amount of
data that needs to be verified for the subjects that require
SDV.
The numbers set in the SDV strategy associated to a site define the targeted SDV subject pool, which consists of the selected subjects that will require verification for that site. For each set of subjects in the SDV strategy, you must specify the SDV type: whether they require verification for all data (100% SDV) or only for a specific set of questions (SDV for All Subjects & Critical Variables).
- To complement SDV strategies, study designers can define
question-level SDV settings in form design to mark specific
questions for SDV. This is required if your SDV strategy uses
the SDV for All Subjects & Critical Variables option,
but you can also define questions that require verification for
all subjects (even for those not selected for the targeted SDV
subject pool), regardless of the SDV type used in the SDV
strategy.
Caution:
Unblinded data may be inferred by blinded users during the verification process, even when a question is hidden. Take this into consideration when defining SDV settings and when specifying the questions that require SDV.
CRAs will then be required to verify the questions for the subjects according to these SDV settings.- If 100% SDV is selected for any of the subject subsets in the SDV strategy (defined initial subjects or percentage of remaining subjects), CRAs must verify all answered questions for those subjects. Read-only questions are excluded.
- If SDV for All Subjects & Critical Variables is selected for any of the subject subsets in the SDV strategy (defined initial subjects or percentage of remaining subjects), CRAs must only verify the questions marked by study designers with the given toggles.
- For all remaining subjects that were not selected for SDV, CRAs must only verify the questions marked by study designers with the SDV for All Subjects toggle.
- Only if your study settings Allow SDV
Overrides, will CRAs have the ability to also verify
non-required questions. These include questions that were not
marked with the SDV toggles by study designers, and questions
for subjects that were not selected for the SDV subject pool, as
per the SDV strategy (including screen failed subjects when
excluded from SDV).
Note:
Questions set as critical variables in form design, are marked with a bullseye icon() for subjects not selected for the targeted SDV subject pool.
SDV settings (in the SDV tab of the study settings) SDV strategy Question-level SDV settings (in form design) - Allow SDV in Study: Yes
- Amount of SDV: Targeted SDV
- Include Screen Failures:
- Select Yes to consider screen failed subjects for data verification.
- Select No to exclude screen failed subjects from the targeted SDV subject pool.
- Allow SDV Overrides:
- Select Yes to allow CRAs to verify all data for all subjects.
- Select No to restrict CRAs to only verify SDV required questions.
Required.
Refer to Create a source data verification strategy and assign it to a site to set up an SDV strategy that meets your study's needs.
Besides creating the SDV strategy, you must assign it to sites for it to be applied.
If your SDV strategy uses SDV for All Subjects & Critical Variables, question-level SDV settings are required.
You have the option to activate the following toggles for the questions that require SDV:- SDV for All Subjects for questions that must be verified for all subjects (regardless of whether they were seleted for the targeted SDV subject pool).
- Critical Variables (Targeted SDV) for questions that must be verified only for the selected subjects as per the SDV strategy.
Related Topics
- Specify settings for Source Data Verification
- Create a source data verification strategy and assign it to a site
- Verify a subject's data
- About Source Data Verification statuses
- How do changes in Source Data Verification settings impact a study?
- How are subjects selected for targeted source data verification?
- Configure source data verification settings for a question
Parent topic: Define settings