Table 2 Odds of having developmental delay among children aged 1- < 6 years according to the sociodemographic characteristics

Locality

 Urban ( n  = 9707)

209 (2.2)

225 (2.3)

476 (4.9)

349 (3.6)

699 (7.2)

 Rural ( n  = 11,609)

203 (1.7)

210 (1.8)

428 (3.7)

332 (2.9)

666 (5.7)

 Odds (CI)

 OR urban vs. rural

1.24

(1.02–1.50)*

1.29

(1.07–1.56)*

1.35

(1.18–1.54)*

1.27

(1.09–1.48)**

1.28

(1.14–1.42)**

Social class

 Low ( n  = 6924)

118 (1.7)

115 (1.7)

314 (4.3)

187 (2.7)

379 (5.5)

 Middle ( n  = 7093)

170 (2.4)

176 (2.5)

347 (4.9)

298 (4.2)

562 (7.9)

 High ( n  = 7299)

124 (1.7)

144 (2)

314 (4.3)

196 (2.7)

424 (5.8)

 OR middle vs. low

1.42

(1.12–1.80)*

1.51

(1.19–1.91)*

1.41

(1.196–1.67)*

1.58

(1.31–1.90)**

1.49

(1.30–1.70)**

 OR middle vs. high

1.421

(1.13–1.80)*

1.26

(1.01–1.58)*

1.14

(0.98–1.34)

1.59

(1.32–1.91)**

1.40

(1.23–1.59)**

 OR low vs. high

1.003

0.78–1.29

.839

0.66–1.08

.81

0.68–0.96

1.01

0.82–1.23

0.94

0.81–1.08

Geographical distribution

 Cities ( n  = 3264)

91 (2.8)

79 (2.4)

216 (6.6)

149 (4.6)

313 (9.6)

 Lower Egypt ( n  = 7921)

112 (1.4)

160 (2)

324 (4.1)

271 (3.4)

520 (6.6)

 Upper Egypt ( n  = 7705)

168 (2.2)

149 (1.9)

282 (3.7)

210 (2.7)

418 (5.4)

 Frontier ( n  = 2426)

41 (1.7)

47 (1.9)

82 (3.4)

51 (2.1)

114 (4.7)

 OR lower Egypt vs. cities

0.50

(0.38–0.66)**

0.83

(0.63–1.09)

.60

(0.50–0.72)

0.74

(0.60–0.91)**

0.66

(0.57–0.77)**

 OR upper Egypt vs. cities

0.78

(0.60–1.01)

0.80

(0.60–1.05)

0.54

(0.45–0.64)

0.59

(0.47-.0.73)**

0.54

(0.46–0.63)**

 OR frontiers vs. cities

0.599

(0.41–0.87)

0.80

(0.55–1.15)

0.49

(0.38–0.64)

0.45

(0.33–0.62)**

0.47

(0.37–0.58)**

 OR lower Egypt vs. frontiers

0.83

(0.58–1.97)

1.04

(0.75–1.45)

1.22

(0.95–1.56)

1.65

(1.22–2.23)**

1.43

(1.16–1.75)**

 OR upper Egypt vs. frontiers

1.297

(0.92–1.83)

0.998

(0.72–1.39)

1.09

(0.85–1.395)

1.30

(0.96–1.78)

1.16

(0.94–1.44)