Table 3

Labour outcomes stratified in the TGCS groups 1–5

Episiotomy (%)Obstetric anal sphincter injuries (%)Duration of labour >12 hours (%)Operative vaginal delivery (%)
SUHNMHSLOSUHNMHSLOSUHNMHSLOSUHNMHSLO
Group 135.856.850.92.42.50.411.32.81.223.724.65.9
Group 2a40.646.145.83.72.20.49.95.81.631.923.47.2
Group 2bNANANANANANANANANANANANA
Group 37.38.820.40.61.00.22.50.20.13.52.50.7
Group 4a11.812.221.80.60.60.23.40.40.26.74.91.3
Group 4bNANANANANANANANANANANANA
Group 517.918.712.12.40.60.110.10.10.213.88.31.7
  • NA, not applicable; SUH, Stavanger University Hospital 2010–2011; NMH, National Maternity Hospital 2011; SLO, Slovenian National Perinatal Database 2007–2011; TGCS, 10-Group Classification System.