The primary-outcome rates were similar among @ women assigned to less-tight control and @ women assigned to tight control ( @ % and @ % , respectively ; adjusted odds ratio , @ ; @ % confidence interval -LSB- CI -RSB- , @ to @ ) , as were the rates of serious maternal complications ( @ % and @ % , respectively ; adjusted odds ratio , @ ; @ % CI , @ to @ ) , despite a mean diastolic blood pressure that was higher in the less-tight-control group by @ mm Hg ( @ % CI , @ to @ ) .