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Table 1 The 10-group classification system

From: Lithuania’s experience in reducing caesarean sections among nulliparas: the impact of the quality improvement course

No.Group
Group 1Nulliparous, single cephalic, 37 weeks, in spontaneous labour
Group 2ANulliparous, single cephalic, 37 weeks, induced labour
Group 2BNulliparous, single cephalic, 37 weeks, CS before labour
Group 3Multiparous (excluding prev. CS), single cephalic, 37 weeks, in spontaneous labour
Group 4AMultiparous (excluding prev. CS), single cephalic, 37 weeks, induced labour
Group 4BMultiparous (excluding prev. CS), single cephalic, 37 weeks, CS before a labour
Group 5APrevious CS, single cephalic, 37 weeks, induced labour
Group 5BPrevious CS, single cephalic, 37 weeks, CS before labour
Group 5CPrevious CS, single cephalic, 37 weeks, in spontaneous labour
Group 6All nulliparous breeches
Group 7All multiparous breeches (including prev. CS)
Group 8All multiple pregnancies (including prev. CS)
Group 9All abnormal lies (including prev. CS)
Group 10All single cephalic, ≤ 36 weeks (including prev. CS)