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Table 3 Proportion of patients alive and registered on the date of the 2011 census at practices actively contributing data to The Health Improvement Network 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 102,970 96,498 (93.7%) 96,448 (99.9%) 96,448 (99.9%)
East of England 262,070 219,216 (83.6%) 219,038 (99.9%) 219,038 (99.9%)
London 443,050 436,073 (98.4%) 388,973 (89.2%) 388,970 (89.2%)
North East 105,225 99,672 (94.7%) 87,656 (87.9%) 87,656 (87.9%)
North West 375,752 361,339 (96.2%) 335,503 (92.8%) 333,132 (92.2%)
South Central 469,322 469,322 (100.0%) 467,804 (99.7%) 466,069 (99.3%)
South East Coast 388,040 369,537 (95.2%) 362,703 (98.2%) 362,676 (98.1%)
South West 357,656 353,201 (98.8%) 337,712 (95.6%) 337,711 (95.6%)
Wales 267,513 242,972 (90.8%) 240,679 (99.1%) 225,442 (92.8%)
West Midlands 333,920 333,920 (100.0%) 316,876 (94.9%) 303,968 (91.0%)
Yorkshire & Humber 81,111 63,283 (78.0%) 63,260 (100.0%) 61,119 (96.6%)
Total 3,186,629 3,045,033 (95.6%) 2,916,652 (95.8%) 2,882,229 (94.7%)