The Passive Surveillance Stroke Severity Score Study
The External Validation of the Passive Surveillance Stroke Severity (PaSSV) Score is an sdministrative data based cohort of patients hospitalized for stroke, where entry to hospital was through ED.
The objectives of the External Validation of the Passive Surveillance Stroke Severity (PaSSV) Score study are:
* To assess the feasibility of deriving the PaSSV score using administrative data from British Columbia, Alberta, and Nova Scotia.
* To assess the association between the PaSSV score and 30-day all-cause mortality in British Columbia, Alberta, and Nova Scotia (geographic external validity), as well as in Ontario (temporal external validity).
* To compare the predictive values of models with and without PaSSV score for 30-day mortality and secondary outcomes (all-cause mortality and admission to nursing home within one year).
* To evaluate whether adding the PaSSV score changes hospital ranking in Ontario for 30-day mortality.
Overview
- Acronym
- PaSSV
- Investigators
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- Contacts
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General Design
- Study design
- Cohort
- Start - End Year
- 2009 - 2020
- General Information on Follow Up (profile, frequency)
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Participants are followed up within 30-days and 1-year after their hospital admission.
- Recruitment Target
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- Individuals
- Number of Participants
- 86,142
- Supplementary information about number of participants
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* Ontario: 65,082 participants * British Columbia: 18,387 participants * Nova Scotia: 2,673 participants
Access
Availability of data and biosamples
| Possible Access to Data | |
| Possible Access to Biosamples | |
| Other |
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Sector of research
| Possible Access to Data | Possible Access to Biosamples | |
| Investigators from the public sector | ||
| Investigators from the private sector | ||
| Investigators from not-for-profit organization |
Transfer
| Possible Access to Data | Possible Access to Biosamples | |
| Can leave the study facility | ||
| Can leave the country |
Cost
| Possible Access to Data | Fixed Cost |
| Possible Access to Biosamples | N/A |
Data Access Support Hub (DASH) does not hold any data. Rather, DASH helps researchers access data held by data centres and repositories that are members of Health Data Research Network Canada (HDRN Canada). Here’s how academic researchers can access multi-regional health and health-related data, https://www.hdrn.ca/en/dash/about-dash/how-dash-works/
Cost reduction for co-analyses
| Possible Access to Data | |
| Possible Access to Biosamples |
Marker Papers
Yu AYX, Austin PC, Park AL, Fang J, et al. Validation of the Passive Surveillance Stroke Severity Score in Three Canadian Provinces. Can J Neurol Sci. 2025 Jan;52(1):53-58. doi: 10.1017/cjn.2024.36. Epub 2024 Mar 6.
PUBMED 38443764Timeline
Population
PaSSV population
The population is composed of patients hospitalized with ischemic stroke and intracerebral hemorrhage in British Columbia, Ontario, and Nova Scotia who have valid health card numbers in these provinces.
Selection Criteria
- Minimum age
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18
- Maximum age
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105
- Countries
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- Canada
- Canadian Provinces
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- British Columbia
- Nova Scotia
- Ontario
- Health Status
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- Patients admitted to hospital with ischemic stroke (H34.1, I63, I64) or intracerebral hemorrhage (I61) in the most responsible diagnosis position in the DAD3.
Sources of Recruitment
- Specific Population
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- Clinic patients
- Supplementary Information
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Participants are identified through the DAD (Discharge Abstract Database), NACRS (National Ambulatory Care Reporting System), OHIP (Ontario Health Insurance Plan) health databases.
Sample Size
- Number of Participants
- 86,142
Data Collection Events
| # | Name | Data sources | Data sources - Biosamples | Start | End |
|---|---|---|---|---|---|
| 0 | PaSSV - Retrospective data |
|
2009 (April) | 2014 (April) | |
| 1 | PaSSV - Observation window |
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2014 (April) | 2020 (March) |
Participating Studies
| Acronym | Name | Study design | Countries |
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Harmonization Initiatives Included
| Acronym | Name |
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Datasets
| Name | Data Collection Events | Variables |
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Variables Content Summary
Areas of Information Collected
No Areas of Information Collected
No Scales Collected
Areas of Information Collected per per Population and Data Collection Event
No Areas of Information Collected
No Scales Collected
Networks
| Acronym | Name | Harmonization Initiatives | Individual Studies |
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Last Update: 2025-04-10T13:25:31.314