Study	Reason for exclusion
Albani 1998	Intervention not standardised ‐ morphine used intraoperatively in spinal group but not in epidural group.
Bernstein 1988	No outcomes looked for were measured (studied effects of anaesthesia on body temperature).
Datta 1983	Unclear if study was randomised.
Douvier 1992	Doses of local anaesthetics used in spinal and epidural groups not stated.
Hagnevik 1988	Combined spinal‐epidural technique used for spinal group.
Lam 1994	Doses of local anaesthetics used in spinal and epidural groups not stated.
Mission 1999	Number of women randomised to each group not specified.
Morgan 2000	Intervention not standardised ‐ spinal morphine used from beginning of surgery but epidural morphine used only after delivery of fetus.
Norman 1998	Combined spinal‐epidural technique used for spinal group.
Ratcliffe 1993	Women allowed to choose between epidural or spinal anaesthesia for operation.
Robson 1992	Combined spinal‐epidural technique used for spinal group.
Russell 1995	Observational prospective study, not randomised.
Sarvela 2002	Combined spinal‐epidural technique used for spinal group.
Valli 1994	Combined spinal‐epidural technique used for spinal group.
Zakowski 1990	Intervention not standardised ‐ spinal morphine used from beginning of surgery but epidural morphine used only after delivery of fetus.