However , graded inequalities by maternal education emerged in the intervention group -LCB- relative risk -LSB- RR -RSB- = @ -LSB- @ % confidence interval ( CI ) : @ , @ -RSB- for partial university and RR = @ -LSB- @ % CI : @ , @ -RSB- for secondary education or less vs complete university ; risk difference -LSB- RD -RSB- = @ -LSB- @ % CI : @ , @ -RSB- and @ -LSB- @ % CI : @ , @ -RSB- , respectively -RCB- .