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Table 4 Infant emergency transport and premature birth differences between the normal and excessive use groups

From: Association of excessive mobile phone use during pregnancy with birth weight: an adjunct study in Kumamoto of Japan Environment and Children’s Study

  Infant emergency transport Premature birth
  Crude OR (95%CI) Adjusted ORa (95%CI) Crude OR (95%CI) Adjusted ORa (95%CI)
Normal user 1 1 1 1
Excessive user 4.07 (1.01–16.30)* 7.93 (1.40–44.85)* 0.66 (0.14–3.02) 0.67 (0.09–4.97)
  1. *P < 0.05
  2. aAdjust for birth weight, birth height, birth head circumference, birth chest circumference, placental weight, maternal age, primiparity, maternal smoking, and maternal BMI before pregnancy