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Table 4 Linkage rates for all births, NSW 2001-2008

From: Investigating linkage rates among probabilistically linked birth and hospitalization records

  Live birth Stillbirth Total*
Singleton Multiple births Singleton Multiple births  
N = 691 197 N = 21 907 N = 4 018 N = 442 N = 717 982
n(%) n(%) n(%) n(%) n(%)
Birth-hospital record linked groups
 Mother and infants 667 315 (96.5) 21 024 (96.0) 60 (1.5) 14 (3.2) 688 802 (95.9)
 Mothers only 11 312 (1.6) 502 (2.3) 3 787 (94.3) 414 (93.7) 16 029 (2.2)
 Infants only 9 553 (1.4) 314 (1.4) 7 (0.2) 0 (0.0) 9 884 (1.4)
Unlinked groups
 Birth record 3 017 (0.4) 67 (0.3) 164 (4.1) 14 (3.2) 3 267 (0.5)
 Infants hospital records 13 469 (-) 620 (-) - (-) - (-) 14 504 (-)
 Maternal hospital records 8 145 (-) 425 (-) 350 (-) 64 (-) 8 984 (-)
  1. * Total includes those records that could not be classified as either stillbirth/live birth or singleton/multiple births.
  2. Stillbirth/live birth and plurality could not be identified for 1,505 of the 704,009 deliveries identified in hospital records (0.2%).