Table 1

Birth weight and background variables

Urban boys

Urban girls

Rural boys

Rural girls


Birth weight,

3298

3203

3105

3057

mean standard deviation

450

435

390

408

and 95% confidence interval, grams

(3263, 3422)

(3148, 3259)

(3071,3139)

(3017, 3097)

Low birth weight, %

2.3

4.2

4.1

4.9

Number of children in study

300

237

513

409

Days from reported last menstruation to birth, mean

272

271

271

272

Mother age, mean, years

28.7

28.3

25.4

25.3

Mother' highest education primary school, %

8.6

4.9

54.8

54.6

Mother education higher than secondary school, %

58.2

67.1

17.4

16.8

Number of household members, mean

4.6

4.4

5.2

5.7

Number of household assets, mean

9.4

9.1

4.7

4.8

Yearly household income, median million VND

75 300 000

78 600 000

35 000

35 000


Nguyen et al. BMC Pediatrics 2012 12:26   doi:10.1186/1471-2431-12-26

Open Data