Obstetrics – elective caesarean section rate
Metric
The proportion of deliveries that were an elective caesarean section.
Numerator
Any spell with a primary procedure with the following OPCS code:
- R17 Elective caesarean delivery
Equivalent to caesarean procedure subgroup in the DFI tools
Denominator
Any spell with a primary procedure of one of the following OPCS codes:
- R17 Elective caesarean delivery
- R18 Other caesarean delivery
- R19 Breech extraction delivery
- R20 Other breech delivery
- R21 Forceps cephalic delivery
- R22 Vacuum delivery
- R23 Cephalic vaginal delivery with abnormal presentation of head at delivery without instrument
- R24 Normal delivery
- R25 Other methods of delivery
Equivalent to “Delivery” procedure group in the DFI tools
Data Source
SUS – CDS
Time frame
April 2010 – March 2011
Basis
Acute trust
Statistical methods used
Indirect standardisation adjusting for maternal age.
If it is intended that a metric such as ‘elective CS rate’ will be useful to compare the performance of maternity units, it will be meaningless unless casemix is taken into account. For example, if in a network of hospitals, one unit delivers all babies less than 28 weeks’ gestation or who require neonatal surgery, the net effect will be to increase the CS rate in that hospital and decrease it in the others.
This should be based upon births and not mothers to take account of multiple births.