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Table 1 Demographic data of enrolled subjects

From: Shared prenatal impacts among childhood asthma, allergic rhinitis and atopic dermatitis: a population-based study

Variable

N = 628,878 (100%)

Childhood allergic diseases

 Sex

  Female

300,290 (47.7)

  Male

328,588 (52.3)

 Allergic diseases

  Asthma

43,915 (6.98)

  AR

7808 (1.24)

  AD

26,901 (4.28)

Maternal allergic diseases and perinatal variables

 Allergic diseases

  Asthma

14,087 (2.24)

  AR

78,743 (12.5)

  AD

10,962 (1.74)

 Urbanization levels

  1 (highest)

191,780 (30.5)

  2

201,557 (32.1)

  3

114,312 (18.2)

  4 (lowest)

121,229 (19.3)

 Parity

  1

427,514 (68.0)

  2

176,644 (28.1)

  3+

24,720 (3.93)

 Gestational age (week)

38.4 (1.52)

 Birth weight, grams

3110 (427)

 Mode of delivery

  Spontaneous birth

411,925 (65.5)

  Cesarean section

216,953 (34.5)

 Age at delivery (years)

29.1 (4.59)

 Gestational diabetes

10,196 (1.62)

 Preeclampsia

4663 (0.74)

  1. AR allergic rhinitis, AD atopic dermatitis