Shaikh 2013.

Trial name or title	'Post dural puncture headache after spinal anaesthesia for caesarean section: a comparison of 25G Quincke, 27G Quincke and 27G Whitacre spinal needles'
Methods	Comparative, randomized, double‐blind, interventional study
Participants	A total of 480 ASA I‐II full‐term pregnant women, 18 to 45 years of age, scheduled for elective caesarean section, under spinal anaesthesia
Interventions	Participants were randomized into 3 groups: Group I (25 G Quincke spinal needle: n = 168), Group II (27 G Quincke spinal needle: n = 160) and Group III (27 G Whitacre spinal needle: n = 152)
Outcomes	The primary outcome was the frequency of PDPH. Secondary outcomes were the severity and onset of PDPH.
Starting date	From October 2005 to December 2006
Contact information	Not known
Notes	—

Acronyms and abbreviations used in this table

ASA: American Society of Anesthesiologists; ASN: Atraucan spinal needle; BMI: body mass index; CI: confidence interval; c‐section: caesarean section; CSF: cerebrospinal fluid; G: gauge; IQR: interquartile range; L2‐3 to L3‐4: lumbar vertebrae 2‐3 to 3‐4; LP: lumbar puncture; NRS: numerical rating scale; NYHA: New York Heart Association; PDPH: post‐dural puncture headache; RCT: randomized controlled trial; SD: standard deviation; SEM: standard error of the mean; VAS: visual analogue scale; WSN: Whitacre spinal needle