Table 4 Odds of having developmental delay among children aged 1- < 6 years according to parental characteristics

Mother’s Education

 1. Illiterate/ below high school (n = 8150)

204 (2.5)

200 (2.5)

380 (4.7)

291 (3.6)

579 (7.1)

 2.High School (n = 9432)

151 (1.6)

183 (1.9)

391 (4.1)

294 (3.1)

593 (6.3)

 3.University or higher (n = 3622)

50 (1.4)

46 (1.3)

122 (3.4)

89 (2.5)

181 (5)

  COR 2 vs. 3

  CI

1.54

(1.11–1.97) *

1.23

(0.97–1.63)

1.19

(0.81–1.74)

1.28

(1.00–1.62) *

1.28

(1.08–1.51) **

  COR 2 vs. 1

  CI

0.79

(0.64–0.96) *

.92

(0.77–1.10)

0.69

(0.54–0.89) *

0.87

(0.74–1.02)

0.88

(0.78–0.99) *

  COR 3 vs. 1

  CI

0.51

(0.37–0.71) **

0.73

(0.56–0.95) *

0.58

(0.40–0.85) **

0.68

(0.53–0.87) **

0.69

(0.58–0.82) **

Father’s Education

 1.Illiterate/ below high school (n = 7129)

192 (2.7)

195 (2.7)

361 (5.1)

273 (3.8)

538 (7.6)

 2.High School (n = 9867)

165 (1.7)

174 (1.8)

394 (4)

301 (3.1)

613 (6.2)

 3.University or higher (n = 3449)

39 (1.1)

42 (1.2)

99 (2.9)

73 (2.1)

152 (4.4)

  COR 2 vs. 3

  CI

1.49

(1.05–2.11) *

1.46

(1.04–2.04) *

1.41

(1.13–1.76) *

1.46

(1.12–1.88) **

1.44

(1.20–1.72) **

  COR 2 vs. 1

  CI

0.61

(0.50–0.76) *

0.64

(0.52–0.79) *

0.78

(0.67–0.90) *

0.79

(0.67–0.93) **

0.81

(0.72–0.92) **

  COR 3 vs. 1

  CI

0.41

(0.29–0.58) **

0.44

(0.31–0.61)**

0.55

(0.44–0.70) *

0.54

(0.42–0.71) **

0.57

(0.47–0.68) **

Mother’ s work

 1. Employed (n = 2976)

47 (1.6)

58 (1.9)

134 (4.5)

87 (2.9)

186 (6.3)

 2. unemployed (n = 18,225)

357 (2)

371 (2)

759 (4.2)

587 (3.2)

1167 (6.4)

  COR 2 vs. 1

  CI

1.25

(0.92–1.69)

1.05

(0.79–1.38)

.922

(0.76–1.11)

.48

(0.22–1.05)

1.03

(0.88–1.20)