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Table 1 PICOS

From: (Update of a) systematic review on the impact of elective early term (< 39th gestational week) caesarean sections on maternal and neonatal health - a protocol

Population Women with electively planned caesarean section beyond prematurity (≥ 37th gestational week), regardless of prior pregnancy or prior birth mode. WHO Stratum A
Intervention Elective caesarean section at 37th + 0 until 38th + 6
Comparator Elective caesarean section ≥ 39th + 0
Outcome Primary outcome:
 Neonatal death, neonatal intensive care unit admission and maternal death
Secondary outcome:
 Neonatal: intensive care unit length of stay, respiratory morbidity, RDS, TTN, pneumothorax, hypoglycemia*, Apgar score, hyperbilirubinemia needing phototherapy, birth weight and near miss
Maternal: hysterectomy, bleeding needing transfusion, near miss and adverse events
Study type RCT, quasi RCT and cohort study
  1. RCT randomized controlled trial, RDS respiratory distress syndrome, TTN Transient tachypnea of the neonate
  2. *Depending on the age at assessment: 0–3 h < 2.0 mmol/l; 3–24 h < 2.2 mmol/l; > 24 h < 2.5 mmol/l [30]