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Table 2 Robson Classification among women with gestational weeks at delivery and mode of delivery information

From: Evaluation of cesarean delivery rates and factors associated with cesarean delivery among women enrolled in a pregnancy cohort study at two tertiary hospitals in Thailand

Robson groupa

Description

Total number of deliveries

Size of each category (%)b

Robson reference for size of each categoryc

Number of cesarean deliveries

Cesarean delivery frequency in each category (%)d

Robson guideline for achievable/ acceptable ratee

Contribution of each category to cesarean delivery rate (%)f

Contribution of each category to total cesarean deliveries (%)g

1

Nulliparous women with a single cephalic pregnancy, ≥ 37 weeks gestation in spontaneous labor

446

20.9

35–42%

242

54.3

 < 10%

11.3

24.9

2

Nulliparous women with a single cephalic pregnancy, ≥ 37 weeks gestation who either had labor induced or were delivered by cesarean delivery before labor

248

11.6

66

26.6

20–35%

3.1

6.8

3

Multiparous women without a previous uterine scar, with a single cephalic pregnancy, ≥ 37 weeks gestation in spontaneous labor

549

25.7

30%

158

28.8

Around 3%

7.4

16.3

4

Multiparous women without a previous uterine scar, with a single cephalic pregnancy, ≥ 37 weeks gestation who either had labor induced or were delivered by cesarean delivery before labor

336

15.7

47

14.0

 < 15%

2.2

4.8

5

All multiparous women with at least one previous uterine scar, with a single cephalic pregnancy, ≥ 37 weeks gestation

296

13.9

‒

290

98.0

50–60%

13.6

29.9

6

All nulliparous women with a single breech pregnancy

26

1.2

3–4%

26

100.0

‒

1.2

2.7

7

All multiparous women with a single breech pregnancy, including women with previous uterine scars

38

1.8

38

100.0

‒

1.8

3.9

8

All women with multiple pregnancies, including women with previous uterine scars

21

1.0

1.5–2%

19

90.5

Around 60%

0.9

2.0

9

All women with a single pregnancy with a transverse or oblique lie, including women with previous uterine scars

5

0.2

‒

5

100.0

‒

0.2

0.5

10

All women with a single cephalic pregnancy < 37 weeks gestation, including women with previous scars

172

8.0

 < 5%

79

45.9

Around 30%

3.7

8.1

Total

 

2137

100.0

 

970

 

‒

45.4

100.0

  1. aWorld Health Organization guidelines for the Robson Classification advise that efforts to reduce cesarean delivery rates should be especially focused on reducing the rate in women in Robson group 1 (nulliparous women ≥ 37 weeks gestation singleton cephalic)
  2. bNumber of women in each category divided by the total number of women
  3. cWorld Health Organization Robson Classification Implementation Manual reference guideline for assessing the type of population. Adapted from: World Health Organization. Robson Classification Implementation Manual. Available at: https://www.who.int/publications/i/item/9789241513197. Last accessed on June 27, 2023
  4. dNumber of cesarean deliveries in the category divided by the number of women in the category. Values that are higher than the Robson guideline for achievable/acceptable rates are bolded
  5. eAdapted from: World Health Organization. Robson Classification Implementation Manual. Available at: https://www.who.int/publications/i/item/9789241513197. Last accessed on June 27, 2023
  6. fNumber of cesarean deliveries in each category divided by the total number of women
  7. gNumber of cesarean deliveries in each category divided by total number of cesarean deliveries
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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