Google Analytics is a powerful tool that tracks and analyzes website traffic for informed marketing decisions.
Service URL: policies.google.com (opens in a new window)
_ga_
ID used to identify users
2 years
_gid
ID used to identify users for 24 hours after last activity
24 hours
_gat
Used to monitor number of Google Analytics server requests when using Google Tag Manager
1 minute
_gac_
Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.
90 days
__utma
ID used to identify users and sessions
2 years after last activity
__utmt
Used to monitor number of Google Analytics server requests
10 minutes
__utmb
Used to distinguish new sessions and visits. This cookie is set when the GA.js javascript library is loaded and there is no existing __utmb cookie. The cookie is updated every time data is sent to the Google Analytics server.
30 minutes after last activity
__utmc
Used only with old Urchin versions of Google Analytics and not with GA.js. Was used to distinguish between new sessions and visits at the end of a session.
End of session (browser)
__utmz
Contains information about the traffic source or campaign that directed user to the website. The cookie is set when the GA.js javascript is loaded and updated when data is sent to the Google Anaytics server
6 months after last activity
__utmv
Contains custom information set by the web developer via the _setCustomVar method in Google Analytics. This cookie is updated every time new data is sent to the Google Analytics server.
2 years after last activity
__utmx
Used to determine whether a user is included in an A / B or Multivariate test.
18 months
_ga
ID used to identify users
2 years
_gali
Used by Google Analytics to determine which links on a page are being clicked
30 seconds
The short-term risk of ischemic stroke following a transient ischemic attack (TIA) is as high as 20% and has been studied extensively. Yet, the long-term risk of stroke remains scarcely described, especially in a contemporary setting and in unselected cohorts. Acute stroke care and treatments, particularly with thrombolysis, have developed significantly, yet the long-term preventive strategies lack evidence. Knowing the long-term risk of stroke is a prerequisite for future randomized clinical trials on various secondary treatment prophylaxis, especially antithrombotic medication.
In a nationwide cohort from the Danish Stroke Registry, we aimed to investigate the 5-year comparative risks of ischemic stroke and all-cause mortality in patients with TIA. Patients with first-time TIA (n = 21,500) were included and matched with the background population (n = 86,000) and a control stroke population (n = 21,500). The median age was 71 years and 53% were male in the three matched study groups. The crude cumulative incidence of ischemic stroke was 6.1% (95% CI, 5.7–6.5), significantly higher than that in the background population ([1.5%; 95% CI, 1.4–1.6; P < .01]; [aHR, 5.14; 95% CI, 4.65–5.69]), yet lower than that in the control stroke population ([8.9%; 95% CI, 8.4–9.4; P < .01]; [aHR, 0.58; 95% CI, 0.53–0.64]). Importantly, these differences persisted beyond the first 90 days. The same result was observed for the outcome of mortality; however, patients with TIA had a 60% lower rate of mortality than the control stroke population. This highlights that, by preventing a stroke among patients with TIA, we may also prevent excess mortality.1
This study along with two other studies, the Framingham Heart Study2 and the TIAregistry.org,3 provide consistent results on three different populations; stroke risk continues to rise beyond the first high-risk period. A window of opportunity exists to reduce stroke risk among patients with TIA. Special attention to cardiovascular risk factors is needed in the long term after TIA, and further research on preventive measures is paramount.
References