Table 1

Sociodemographic characteristics of study children

Total sample (N = 649)

Sub-sample (N = 173)



Sociodemographics

Boys (%)

Girls (%)

Total (%)

p**

Boys (%)

Girls (%)

Total

p**



School type

Public

219 (47.9)

238 (52.1)

457 (70.4)

60 (49.6)

61 (50.4)

121 (69.9)

0.808

0.518

Private

90 (46.9)

102 (53.1)

192 (29.6)

23 (44.2)

29 (55.8)

52 (30.1)

School location

Urban area

259 (47.7)

284 (52.3)

543 (83.7)

69 (47.6)

76 (52.4)

145 (83.8)

0.921

0.815

Peri-urban area

50 (47.2)

56 (52.8)

106 (16.3)

14 (50.0)

14 (50.0)

28 (16.2)

Age (years)

Mean++

11.5 ± 1.2

11.5 ± 1.2

11.5 ± 1.2

0.780*

11.6 ± 1.3

11.6 ± 1.3

11.6 ± 1.3

0.919*

7-9

31 (49.2)

32 (50.8)

63 (9.7)

10 (58.8)

7 (41.2)

17 (9.8)

10-12

241 (47.5)

266 (52.5)

507 (78.1)

0.959

59 (46.5)

68 (53.5)

127 (73.4)

0.631

13-14

37 (46.8)

42 (53.2)

79 (12.2)

14 (48.3)

15 (51.7)

29 (16.8)


Total

309 (47.6)

340 (52.4)

649 (100)

83 (48.0)

90 (52.0)

173 (100)


++ Mean age ± SD

* Independent t-test

** χ2 test

208 children (half boys) were randomly selected to assess vitamin A status. Because of the impact of puberty and age on body measurements, we excluded subjects older than 14 years and those whose date of birth was not known. Then 173 subjects in the sub-sample with complete data were retained for the analyses.

Daboné et al. Nutrition Journal 2011 10:34   doi:10.1186/1475-2891-10-34

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