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Table 2 ICD-10 diagnoses for pregnancy-related aeromedical retrievals* by the Royal Flying Doctor Service according to the operation area, 2015–2019 (N = 4438)

From: Pregnancy-related aeromedical retrievals in rural and remote Australia: national evidence from the Royal Flying Doctor Service

ICD-10 diagnoses* N (%) Operation area p-value**
Central
(NT – SA)
Queensland
(QLD)
South East (NSW) Western (WA)
% % % %
Pregnancy with abortive outcome (O00-O08) 388 (8.7) 7.8 9.3 5.4 9.6 0.044
Ectopic pregnancy (O00) 240 (5.4) 4.1 7.0 3.7 5.4  
Complications following ectopic and molar pregnancy (O08) 9 (0.2) 0.4 0.4 0.0 0.0  
Others 139 (3.1) 3.4 2.0 1.7 4.2  
Supervision of high-risk pregnancy O09 27 (0.6) 0.0 2.0 0.0 0.0 < 0.001
Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16) 421 (9.5) 10.0 8.1 8.9 10.5 0.15
Pre-existing hypertension (O10-O11) 25 (0.6) 1.2 0.7 0.9 0.0  
Gestational hypertension and preeclampsia (O13-O14) 356 (8.0) 7.6 6.2 7.4 9.9  
Eclampsia (O15) 20 (0.5) 0.6 0.7 0.3 0.2  
Others 20 (0.5) 0.5 0.5 0.3 0.4  
Other maternal disorders predominantly related to pregnancy (O20-O29) 240 (5.4) 8.7 5.4 6.3 2.9 < 0.001
Haemorrhage in early pregnancy (O20) 84 (1.9) 2.8 1.8 2.0 1.4  
Diabetes mellitus in pregnancy (O24) 34 (0.8) 1.8 0.6 0.3 0.3  
Other maternal care for other conditions related to pregnancy (O26) 56 (1.3) 2.1 1.3 2.6 0.4  
Abnormal findings on antenatal screening (O28) 34 (0.8) 0.9 1.6 0.0 0.2  
Others 32 (0.7) 1.2 0.2 1.4 0.7  
Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) 1303 (29.4) 22.4 29.2 32.3 33.7 < 0.001
Premature rupture of membranes (O42) 663 (14.9) 10.8 14.4 15.7 18.1  
Antepartum haemorrhage (O46) 278 (6.3) 3.6 6.0 6.3 8.3  
Others 362 (8.2) 7.9 8.8 10.3 7.3  
Complications of labour and delivery (O60-O75) 1843 (41.5) 42.3 40.3 41.7 42.0 0.72
Threatened preterm labour and delivery (O60) 1616 (36.4) 34.3 34.8 34.9 39.5  
Others 227 (5.1) 8.0 5.4 6.9 2.5  
Normal term delivery (O80-O84) 115 (2.6) 5.0 3.4 3.4 0.1 < 0.001
Complications predominantly related to the puerperium (O85-O92) 49 (1.1) 1.6 1.0 1.1 0.9 0.31
Other obstetric conditions, not elsewhere classified (O94-O99) 52 (1.1) 2.2 1.3 0.9 0.4 < 0.001
Total retrievals with ICD-10 diagnoses – N 4438 1125 1349 350 1614  
  1. * Missing data for the three-character ICD-10 categories for 215 (4.6%) of the total 4653 pregnancy-related retrievals classified as Chapter XV
  2. ** Chi-squared test of heterogeneity comparing the prevalence of the three-character ICD-10 categories across operation areas