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Table 1 Demographic and sociological characteristics related to birth weight-related adverse outcomes in central South China

From: Maternal pre-pregnancy body mass index and gestational weight gain on adverse birth outcomes in Chinese newborns: a retrospective study

Characteristics

Total (n)

Low birth weight

(n (%))

Macrosomia

(n (%))

SGA

(n (%))

LGA

(n (%))

Preterm birth

(n (%))

Maternal age

           
 

Below 25 years

809

25

(3.09)**

34

(4.20)*

29

(3.58)

156

(19.28)**

29

(3.58)**

 

25 to 29 years

5654

184

(3.25)

263

(4.65)

162

(2.87)

1278

(22.60)

243

(4.30)

 

30 to 34 years

6821

289

(4.24)

388

(5.69)

173

(2.54)

1784

(26.15)

359

(5.26)

 

35 to 39 years

2290

124

(5.41)

130

(5.68)

67

(2.93)

631

(27.55)

174

(7.60)

 

40 years and above

349

19

(5.44)

11

(3.15)

9

(2.58)

117

(33.52)

27

(7.74)

Residence

           
 

City

11,553

427

(3.70)*

617

(5.34)

316

(2.74)

2889

(25.01)

560

(4.85)**

 

Rural

4370

214

(4.90)

209

(4.78)

124

(2.84)

1077

(24.65)

272

(6.22)

Ocuppation

           
 

Farming or migrant workers

1171

64

(5.47)*

55

(4.70)

49

(4.18)

281

(24.00)**

75

(6.40)

 

Public officials

2831

99

(3.50)

139

(4.91)

75

(2.65)

664

(23.45)

130

(4.59)

 

Enterprises personnel

3148

107

(3.40)

161

(5.11)

78

(2.48)

728

(23.13)

157

(4.99)

 

Businessmen

1045

42

(4.02)

57

(5.45)

29

(2.78)

306

(29.28)

57

(5.45)

 

Unemployed

2166

92

(4.25)

109

(5.03)

55

(2.54)

559

(25.81)

119

(5.49)

 

Others

5562

237

(4.26)

305

(5.48)

154

(2.77)

1428

(25.67)

294

(5.29)

Education

           
 

College and above

12,367

462

(3.74)*

651

(5.26)

340

(2.75)

3035

(24.54)

615

(4.97)

 

High/technical secondary school

2491

126

(5.06)

128

(5.14)

72

(2.89)

646

(25.93)

150

(6.02)

 

Junior and below

881

45

(5.11)

39

(4.43)

24

(2.72)

233

(26.45)

57

(6.47)

 

Unkown

184

8

(4.35)

8

(4.35)

4

(2.17)

52

(28.26)

10

(5.43)

Gravidity

           
 

Once

5951

273

(4.59)*

262

(4.40)*

218

(3.66)**

1131

(19.01)**

317

(5.33)**

 

Twice

4906

153

(3.12)

265

(5.40)

108

(2.20)

1272

(25.93)

212

(4.32)

 

Three times

2829

111

(3.92)

173

(6.12)

74

(2.62)

837

(29.59)

145

(5.13)

 

Four times and above

2237

104

(4.65)

126

(5.63)

40

(1.79)

726

(32.45)

158

(7.06)

Parity

           
 

Once

8289

227

(2.74)**

421

(5.08)

271

(3.27)**

1735

(20.93)**

300

(3.62)**

 

Tiwice

7229

352

(4.87)

390

(5.39)

155

(2.14)

2117

(29.28)

460

(6.36)

 

Three times and above

405

62

(15.31)

15

(3.70)

14

(3.46)

114

(28.15)

72

(17.78)

Total

15,923

641(4.03)

826(5.19)

440(2.76)

3966(24.91)

832(5.23)

  1. * P < 0.05;* P < 0.001; comparing by Chi-Square Tests; SGA: Small for gestational age; LGA: Large for gestational age