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. 2018 Sep 28;2018(9):CD005528. doi: 10.1002/14651858.CD005528.pub3

Lo 2008.

Methods Interrupted time series study
Participants Taiwan
Pregnant women (2001 to 2005)
Interventions Financial interventions: 1) Increase in vaginal birth after caesarean (VBAC) fee to the same level as caesarean section (April 2003); 2) Increase in vaginal birth fee to that of caesarean section (May 2005)
Outcomes Caesarean section and VBAC rates
Notes Baseline (control group) CS rate: 29%
Date of study: 2001 to 2005
Funding: not stated
Conflict of interest: not stated
Risk of bias
Bias Authors' judgement Support for judgement
Intervention independent of other changes? Unclear risk Insufficient information provided in the report
Shape of the intervention effect pre‐specified? Low risk Point of analysis is the point of intervention
Intervention unlikely to affect data collection? Low risk Considered unlikely to affect data collection
Incomplete outcome data (attrition bias) 
 All outcomes Unclear risk No reference to missing data
Selective reporting (reporting bias) Low risk Data on all prespecified outcomes reported
Knowledge of the allocated interventions adequately prevented during the study? Low risk Main outcome of interest (mode of delivery) objective
Other bias Low risk No evidence of other bias