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Table 3 ICD-10 diagnoses for pregnancy-related aeromedical retrievals* by the Royal Flying Doctor Service according to age groups, 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* Maternal age groups p-value**
15–19 years 20–34 years 35–49 years
% % %
Pregnancy with abortive outcome (O00-O08) 11.2 8.4 9.0 0.17
Ectopic pregnancy (O00) 6.8 5.4 4.9  
Complications following ectopic and molar pregnancy (O08) 0.0 0.2 0.3  
Others 4.4 2.8 3.9  
Supervision of high-risk pregnancy O09 0.8 0.6 0.6 0.90
Oedema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16) 9.7 9.1 11.6 0.13
Pre-existing hypertension (O10-O11) 0.5 0.4 1.6  
Gestational hypertension and preeclampsia (O13-O14) 8.4 7.9 8.4  
Eclampsia (O15) 0.3 0.5 0.4  
Others 0.5 0.3 1.0  
Other maternal disorders predominantly related to pregnancy (O20-O29) 3.9 5.6 5.3 0.39
Haemorrhage in early pregnancy (O20) 0.5 2.1 1.6  
Diabetes mellitus in pregnancy (O24) 0.3 0.6 1.8  
Other maternal care for other conditions related to pregnancy (O26) 1.0 1.2 1.5  
Abnormal findings on antenatal screening (O28) 0.3 0.9 0.4  
Others 1.8 0.7 0.0  
Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) 20.4 28.6 38.4 < 0.001
Premature rupture of membranes (O42) 9.9 14.6 19.4  
Antepartum haemorrhage (O46) 3.9 6.1 8.3  
Others 6.5 7.8 10.7  
Complications of labour and delivery (O60-O75) 46.7 43.1 31.0 < 0.001
Threatened preterm labour and delivery (O60) 40.7 37.8 26.8  
Others 6.0 5.2 4.2  
Normal term delivery (O80-O84) 3.9 2.6 1.8 0.11
Complications predominantly related to the puerperium (O85-O92) 1.6 1.1 1.0 0.66
Other obstetric conditions, not elsewhere classified (O94-O99) 1.8 1.1 1.3 0.39
Total retrievals with ICD-10 diagnoses – N 383 3380 675  
  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