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Table 2 Proportions of all patients ever registered at practices actively contributing data to The Health Improvement for whom partial (at least one element) or complete (all elements) soil measurements were obtained through linkage to the Geochemical Baseline Survey of the Environment (G-BASE)

From: Linkage of national soil quality measurements to primary care medical records in England and Wales: a new resource for investigating environmental impacts on human health

Strategic Health Authority

Total patients at active practices

Patients at linkage practices (% of total)

Patients with partial G-BASE data (% of patients at linkage practices)

Patients with complete G-BASE data (% of patients at linkage practices)

East Midlands

212,395

198,085 (93.3%)

190,681 (96.3%)

190,679 (96.3%)

East of England

574,828

474,517 (82.5%)

462,008 (97.4%)

462,005 (97.4%)

London

1,208,044

1,190,099 (98.5%)

1,000,246 (84.0%)

1,000,232 (84.0%)

North East

218,821

208,238 (95.2%)

175,302 (84.2%)

175,301 (84.2%)

North West

767,722

733,446 (95.5%)

660,898 (90.1%)

656,475 (89.5%)

South Central

1,069,029

1,069,029 (100.0%)

1,040,055 (97.3%)

1,035,340 (96.8%)

South East Coast

873,765

845,650 (96.8%)

804,428 (95.1%)

804,367 (95.1%)

South West

763,658

752,735 (98.6%)

706,818 (93.9%)

706,817 (93.9%)

Wales

564,190

503,432 (89.2%)

485,619 (96.5%)

451,544 (89.7%)

West Midlands

716,592

716,592 (100.0%)

662,649 (92.5%)

633,347 (88.4%)

Yorkshire & Humber

168,321

133,559 (79.3%)

131,448 (98.4%)

127,256 (95.3%)

Total

7,137,365

6,825,382 (95.6%)

6,320,152 (92.6%)

6,243,363 (91.5%)