Interinstitutional Variation of Caesarean Delivery Rates According to Indications in Selected Obstetric Populations: A Prospective Multicenter Study

Table 1

10-group classification. Groups 2 and 4 were further divided respectively in to 2a, 2b and 4a, 4b.

Group	Classification
1	Nulliparous, single cephalic, ≥37 weeks, in spontaneous labour
2a	Nulliparous, single cephalic, ≥37 weeks, induced labour
2b	Nulliparous, single cephalic, ≥37 weeks, CD before labour
3	Multiparous (excluding previous CD), single cephalic, ≥37 weeks, in spontaneous labour
4a	Multiparous (excluding previous CD), single cephalic, ≥37 weeks, induced labour
4b	Multiparous (excluding previous CD), single cephalic, ≥37 weeks, CD before labour
5	Previous CD, single cephalic, ≥37 weeks
6	All nulliparous breeches
7	All multiparous breeches (including previous CD)
8	All multiple pregnancies (including previous CD)
9	All transverse/oblique lies (including previous CD)
10	All preterm single cephalic, <37 weeks, including previous CD

CD: caesarean delivery.