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Table 1 The search strategy of the association of sleep duration and quality with preterm birth

From: Association between maternal sleep duration and quality, and the risk of preterm birth: a systematic review and meta-analysis of observational studies

#1Search “Sleep”[MeSH]
#2sleep duration OR sleep time OR sleep disorders OR sleep quality OR sleep deprivation OR sleep disturbance OR 24-h sleep duration OR night time sleep duration OR short sleep duration OR long sleep duration OR sleep insufficient OR sleep loss OR sleep poor OR sleep inadequate OR sleep amount OR sleep restrict OR sleep lack OR sleep impair OR hypersomnia OR daytime sleepiness OR long sleepers OR short sleepers OR sleep initiation and maintenance disorders OR nap OR napping OR siesta OR drowse OR insomnia OR drowsiness OR sleep wake disorders OR sleep stages
#3#1 OR #2
#4Search “Pregnancy”[MeSH]
#5gestation OR gestational OR pregnant women OR gravidity OR pregnancies
#6#4 OR #5
#7Search “Premature Birth”[MeSH]
#8infant, newborn OR infant, premature OR obstetric labor, premature OR birth, premature OR births, premature OR premature births OR birth, preterm OR births, preterm OR preterm births OR labor, premature OR infant, extremely premature OR pregnancy outcome OR birth outcomes OR labor, premature obstetric OR premature labor OR preterm labor OR labor, preterm OR labor, premature OR premature obstetric labor
#9#7 OR #8
#10#3 AND #6 AND #9
 Restriction to articles published in English and up to September 30, 2018.
  1. Based on MeSH terms and key words, a strategy was created to search related literature in the PubMed and Web of Science databases