Table 1 Comparison of maternal insecticide use frequency between the otitis media and no otitis media groups.

From: Association between maternal insecticide use and otitis media in one-year-old children in the Japan Environment and Children’s Study

 

OM (-)

OM ( +)

Usage of insecticide by the mother from conception to the first trimester (n = 79,098)

Never (%)

66,054 (94)

8,505 (94)

1 to 3 times per month (%)

3,365 (5)

428 (5)

More than once a week (%)

646 (1)

100 (1)

Usage of insecticide by the mother from conception to the second/third trimester (n = 84,544)

Never (%)

68,612 (92)

8,818 (91)

1 to 3 times per month (%)

5,401 (7)

726 (8)

More than once a week (%)

875 (1)

112 (1)

  1. OM otitis media.
  2. There were no significant differences in other patient characteristics, including sex, maternal age, birth weight, gestational age, living with siblings at 6 months, daycare attendance at the age of 1 year, maternal history of chronic otitis media, maternal and paternal smoking history, exposure to secondhand smoke, infertility treatment, family member’s smoking status, and maternal occupational categories between the otitis media and no otitis media groups in the first year in children.
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