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Table 1 Demographic characteristics of Iranian women who have given birth during selected periods

From: The incidence of congenital anomalies in newborns before and during the Covid-19 pandemic

Characteristics

During Covid-19:

1st November 2020-

28th February 2021

Before Covid-19:

1st November 2019-

29th February 2020

Mother of newborn without anomaly

N = 345,827

Mother of newborn with anomaly

N = 2012

P value*

(Chi-square)

Mother of newborn without anomaly

N = 393,860

Mother of newborn with anomaly

N = 1868

P value*

(Chi-square)

Age

   < 18

13,443 (3.89)

91 (4.52)

 < 0.00001*

15,392 (3.91)

82 (4.39)

 < 0.00001*

  18–35

260,753 (75.40)

1429 (71.02)

301,030 (76.43)

1358 (72.69)

   > 35

71,631 (20.71)

492 (24.46)

77,438 (19.66)

428 (22.92)

Education

   < high school

118,870 (34.37)

884 (43.94)

 < 0.00001*

135,260 (34.34)

791 (42.34)

 < 0.00001*

  High school

149,718 (43.29)

780 (38.76)

171,128 (43.45)

739 (39.56)

   ≥ college

77,239 (22.34)

348 (17.30)

87,472 (22.21)

338 (18.10)

Parity

  primiparous

123,507 (35.71)

710 (35.29)

0.69

151,436 (38.45)

736 (39.40)

0.39

  multiparous

222,320 (64.29)

1302 (64.71)

242,424 (61.55)

1132 (60.60)

Type of delivery

  NVD

161,801 (46.79)

912 (45.33)

0.19

190,441 (48.35)

852 (45.61)

0.01*

  CS

184,026 (53.21)

1100 (54.67)

203,419 (51.65)

1016 (54.39)

  1. * The significance level was set at P value < 0.05