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Table 1 Sociodemographic profile of each dataset - number and proportion of records in each sociodemographic category

From: Sociodemographic differences in linkage error: an examination of four large-scale datasets

  NSW Emergency NSW Hospital SA Emergency WA Hospital
Total 4,304,459 (100%) 19,874,083 (100%) 813,839 (100%) 6,772,949 (100%)
Remoteness
 Major Cities 2,868,504 (67%) 14,351,493 (72%) 690,399 (85%) 5,045,362 (74%)
 Regional 1,367,635 (32%) 5,263,797 (26%) 54,665 (7%) 1,199,149 (18%)
 Remote 12,250 (0%) 137,540 (1%) 6333 (1%) 498,850 (7%)
Sex
 Male 2,178,168 (51%) 9,346,451 (47%) 386,176 (47%) 3,184,925 (47%)
 Female 2,125,422 (49%) 10,526,591 (53%) 427,645 (53%) 3,588,021 (53%)
Socioeconomic Status
 Most Disadvantaged 1,155,081 (27%) 4,133,693 (24%) 212,613 (26%) 1,723,482 (26%)
 2 833,405 (19%) 3,574,267 (21%) 172,838 (21%) 1,468,495 (22%)
 3 974,884 (23%) 3,220,110 (19%) 154,871 (19%) 1,256,879 (19%)
 4 705,006 (16%) 3,133,389 (18%) 129,227 (16%) 1,128,067 (17%)
 Least Disadvantaged 563,326 (13%) 3,285,911 (19%) 103,915 (13%) 1,149,271 (17%)
Year of birth
  < 1950 1,431,527 (33%) 9,726,134 (49%) 269,257 (33%) 3,164,258 (47%)
 1950–1979 1,849,952 (43%) 6,460,872 (33%) 353,815 (43%) 2,535,776 (37%)
 1980+ 1,022,980 (24%) 3,686,298 (19%) 190,767 (23%) 1,072,915 (16%)