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Table 5 Proportion of reports with a brain imaging phenotype in NHS Tayside (110,695 reports). Small numbers suppressed due to data governance requirements

From: A validated natural language processing algorithm for brain imaging phenotypes from radiology reports in UK electronic health records

 

Reports (N)

Percentage of total number of scans (%)

Atrophy

28,757

26.0

Small vessel disease

15,015

13.6

Stroke

 Underspecified

1609

1.5

Haemorrhagic stroke

 Deep, old

168

0.2

 Deep, recent

397

0.4

 Lobar, old

288

0.3

 Lobar, recent

415

0.4

 Underspecified

5702

5.2

Ischaemic stroke

 Cortical, old

4385

4.0

 Cortical, recent

1860

1.7

 Deep, old

10,636

9.6

 Deep, recent

771

0.7

 Underspecified

9172

8.3

 Haemorrhagic transformation

279

0.3

 Subdural hematoma

2272

2.1

Subarachnoid haemorrhage

 Aneurysmal

55

0.1

 Other

1381

1.3

Microbleed

 Deep

15

0.0

 Lobar

< 10

0.0

 Underspecified

19

< 0.1

Tumour

 Glioma

667

0.6

 Meningioma

1458

1.3

 Metastasis

2621

2.4

 Other

4191

3.8