The following context is about medicine research, a bit hard to read. But what I need most is your grammatical instruction:
Hyperglycemia and Adverse Pregnancy Outcomes
The HAPO Study Cooperative Research Group
May 8, 2008
ABSTRACT
Background It is controversial whether maternal hyperglycemia less severe than that in diabetes mellitus is associated with increased risks of adverse pregnancy outcomes.
Methods A total of 25,505 pregnant women at 15 centers in nine countries underwent 75-g oral glucose-tolerance testing at 24 to 32 weeks of gestation. Data remained blinded if the fasting plasma glucose level was 105 mg per deciliter (5.8 mmol per liter) or less and the 2-hour plasma glucose level was 200 mg per deciliter (11.1 mmol per liter) or less. Primary outcomes were birth weight above the 90th percentile for gestational age, primary cesarean delivery, clinically diagnosed neonatal hypoglycemia, and cord-blood serum C-peptide level above the 90th percentile. Secondary outcomes were delivery before 37 weeks of gestation, shoulder dystocia or birth injury, need for intensive neonatal care, hyperbilirubinemia, and preeclampsia.
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1) The data remained blinded? Reminded blinded for who? Remained blinded for investigators/for performers of the study?
2) Does the primary outcome refer to the first time outcome of oral glucose-tolerance testing?
Primary outcomes were: (1) birth weight above the
90th percentile for gestational age, (2) primary
cesarean delivery, (3) clinically diagnosed neonatal
hypoglycemia, and (4) cord-blood serum C-peptide level
above the 90th percentile?
3) What does "birth weight above the 90th percentile for gestational age" mean?