The Danish Stroke Registry

Figures & data

Table 1 Indicators and standards in the Danish Stroke Register

Indicator area	Indicator	Type	Standard (%)
Fast admission	Proportion of all patients with stroke who are admitted to hospital within 3 hours after symptom onset	Process	≥30
	Proportion of all patients with stroke who are admitted to hospital within 4.5 hours after symptom onset	Process	≥40
Thrombolysis	Proportion of patients treated with thrombolysis who have a door to needle time ≤1 hour	Process	≥75
	Proportion of patients with ischemic stroke receiving thrombolysis	Process	≥15
Endovascular therapy	Proportion of patients treated with endovascular therapy who have a door (first hospital) to groin puncture time of ≤3 hours	Process	≥90
	Proportion of patients treated with endovascular therapy who achieve a TICI posttreatment reperfusion grade ≥2B	Process	≥70
	Proportion of patients treated with endovascular therapy who 3 months posttreatment achieve a modified Rankin Scale score <3	Result	≥30
Organization of treatment and rehabilitation in stroke unit	Proportion of patients with acute stroke who are admitted to a stroke unit within the second day of admission	Process	≥90
Pharmacological secondary prophylaxis	Proportion of patients with acute ischemic stroke without atrial fibrillation who receive platelet inhibitor therapy within the second day of admission	Process	≥95
	Proportion of patients with TIA without atrial fibrillation who receive platelet inhibitor therapy within the second day after first contact with a hospital	Process	≥95
	Proportion of patients with ischemic stroke and atrial fibrillation who receive oral anticoagulation therapy within 14 days after admission	Process	≥95
	Proportion of patients with TIA and atrial fibrillation who receive oral anticoagulation therapy within 14 days after first contact with a hospital	Process	≥95
Diagnosis by CT/MR scan	Proportion of patients with acute stroke who receive CT/MR scan on the day of admission	Process	≥80
	Proportion of patients with TIA who receive a CT/MR scan on the day of first contact with a hospital	Process	≥80
Assessment by physiotherapist	Proportion of patients with acute stroke, which is assessed by a physiotherapist regarding need of rehabilitation (including type and extent) within the second day of admission	Process	≥90
Assessment by occupational therapist	Proportion of patients with acute stroke, which is assessed by an occupational therapist regarding need of rehabilitation (including type and extent) within the second day of admission	Process	≥90
Early mobilization	Proportion of patients with acute stroke who are mobilized on the day of admission	Process	≥80
Assessment of nutritional risk	Proportion of patients with acute stroke who receive a nutritional risk assessment within the second day of admission	Process	≥90
Screening for dysphagia	Proportion of patients with acute stroke, which is assessed by a swallowing test (indirect and direct) on the day of admission before receiving food or fluids in order to assess swallowing function and risk of aspiration	Process	≥80
Ultrasound CT-/MR-angiography of carotid arteries	Proportion of patients with acute ischemic stroke who are examined with ultrasound CT-/MR-angiography of carotid arteries within the fourth day of admission	Process	≥90
	Proportion of patients with TIA who are examined with ultrasound CT-/MR-angiography of carotid arteries within the fourth day after first contact with a hospital	Process	≥90
Waiting time to carotid endarterectomy	Proportion of patients with acute ischemic stroke undergoing carotid endarterectomy in whom time from admission to surgery is ≤14 days	Process	≥90
	Proportion of patients with TIA undergoing carotid endarterectomy in whom time from first contact with a hospital to surgery is ≤14 days	Process	≥90
Mortality	Proportion of patients with acute stroke (any type) who die within 30 days after admission	Result	≤15
	Proportion of patients with acute ischemic stroke who die within 30 days after admission	Result	≤12
	Proportion of patients with intracerebral hemorrhage who die within 30 days after admission	Result	≤40
Nonplanned readmission	Proportion of acute stroke patients with unplanned all-cause readmission within 30 days after discharge	Result	≤15

Abbreviations: CT/MR, computed tomography/magnetic resonance; TIA, transient ischemic attack; TICI, Thrombolysis in Cerebral Infarction scale.

Table 2 Key variables registered in the Danish Stroke Registry

Variable	Content
Administrative
ID	Unique number for identification of the event.
CPR	Unique 10-digit personal identifier.
Hospital	Unique code for the individual hospital and department.
Sociodemographic prognostic factors
Age	Age at day of admission.
Sex
Type of residence	Residence at time of admission (own residence, care home, other, undisclosed).
Civil status	Civil status at time of admission (cohabitant, lives alone, other, undisclosed).
Clinical prognostic factors
Scandinavian Stroke Scale Score	Used to assess admission stroke severity. Score ranges from 0 to 58 points.
Diabetes mellitus	Documented history or diagnosed during current admission.
Myocardial infarction	Documented history or diagnosed during current admission.
Atrial fibrillation	Documented history or diagnosed during current admission.
Former stroke	Documented history or diagnosed during current admission.
Hypertension	Documented history or diagnosed during current admission.
Intermittent claudication	Documented history or diagnosed during current admission.
Lifestyle prognostic factors
Body Mass Index	Body Mass Index at the time of admission.
Alcohol intake	Average weekly alcohol intake at the time of admission according to recommendation from the
	Danish National Board of Health (≤7/14 drinks/week for women and men, respectively).
Smoking	Smoking habits at the time of admission (smoker, ex-smoker, never smoker, undisclosed).
Processes of carea
Thrombolysis	Use of thrombolysis.
Endovascular therapy	Use of endovascular therapy.
Admission to stroke unit	Admission to a specialized stroke unit providing multidisciplinary care.
CT/MR scan	Use of CT/MR scan of the brain.
Antiplatelet therapy	Use of antiplatelet therapy after stroke/TIA.
Oral anticoagulant therapy	Use of oral anticoagulant therapy after stroke/TIA.
Assessment by physiotherapist	Formal assessment by trained physiotherapist regarding need of rehabilitation after admission with acute stroke.
Assessment of occupational therapist	Formal assessment by trained occupational therapist regarding need of rehabilitation after admission with acute stroke.
Assessment of nutritional risk	Formal assessment of nutritional risk performed after admission with acute stroke
Mobilization	Mobilization (patient out of bed) performed after admission with acute stroke.
Screening for dysphagia	Screening for dysphagia (indirect and direct) performed after admission with acute stroke.
Ultrasound CT-/MR-angiography of carotid arteries	Carotid arteries examined after admission with acute stroke/TIA.
Patient outcomes
30-day mortality	All-cause mortality within 30 days after date of admission for acute stroke. Information obtained by record linkage with the Civil Registration System.
30-day unplanned readmission	Unplanned all-cause readmission to any Danish hospital within 30 days after discharge.
	Information is obtained by record linkage with the Danish National Registry of Patients.
Modified Rankin Scale Score	Recorded 3 months after date of admission. Only recorded for patients receiving revascularization therapy.

Note:

a Registered data include date and time as well as eligibility of the individual patient for each process of care.

Abbreviations: CT/MR, computed tomography/magnetic resonance; TIA, transient ischemic attack; CPR, social security number.