According to the Robson Ten Group Classification System (TGCS), a primigravida at term in spontaneous labour with a cephalic singleton presentation belongs to which Robson group, and why is this group considered the 'key group' for LSCS audit?
- A Robson Group 1 — this group represents the largest pool of future uterine scar cases; its LSCS rate directly determines future repeat caesarean burden ✓
- B Robson Group 3 — multiparous women contribute most to total caesarean section rates
- C Robson Group 5 — women with previous LSCS drive the highest absolute number of caesareans
- D Robson Group 2 — induced nulliparous women have highest LSCS rates making this the most impactful group
Correct answer: A. Robson Group 1 — this group represents the largest pool of future uterine scar cases; its LSCS rate directly determines future repeat caesarean burden
Explanation
Robson Group 1 (nulliparous, singleton cephalic, ≥37 weeks, spontaneous labour) is considered the 'benchmark' or 'key group' for caesarean audit. Although Group 5 (previous LSCS) contributes the largest absolute number of caesareans globally, Group 1 is pivotal because every primary caesarean in this group creates a uterine scar. The caesarean rate in Group 1 determines the future burden of Group 5, Group 6, and Group 7 repeat/trial-of-scar cases. WHO and FIGO recommend that audit begin with Group 1 rates, which ideally should be <10–15%.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.