Anaemia among school children of different socioeconomical status in a city of Southern Brazil

Figures & data

Table 1. Students enrolled in the final years of elementary school in the state and municipal networks, urban and rural part-time in the city of Santa Cruz do Sul/RS.

School Location
Urban State	3.036
State Rural	51
Municipal Urban	1.742
Municipal Rural	603
Total	5.432

Source: IBGE, 2012

Table 2. Family Income by Social Class.

Class	Points	Average Family Income (Gross Value in R$)
A1	42 to 46	14,366
A2	35 to 41	8,099
B1	29 to 34	4,558
B2	23 to 28	2,327
C1	18 to 22	1,391
C2	14 to 17	933
D	8 to 13	618
E	0 to 7	403

Source: [ABEP] Associação Brasileira de Empresas de Pesquisa 2008

Table 3. Sociodemographic characteristics of the schoolchildren participating in the study.

	Mean ± SD	N
Age (years)	11.2 ± 0.9	207
Sex	%	N
Male	43.5	90
Female	56.5	117
Social class	%	N
A1	0.0	0
A2	3.4	7
B1	9.7	20
B2	36.2	75
C1	28.0	58
C2	18.4	38
D	4.3	9
E	0.0	0

Table 4. Hematological characteristics of the schoolchildren.

		Normal Reference	School children with results below the reference values
	Mean ± SD	Value	(%)	N
Haemoglobin (g/dL)*	12.8 ± 0.8	> 12	13.0	27
Haematocrit (%)*	37.9 ± 2.1	> 34	5.3	11
Corpuscular Volume Mean (fL)*	82.4 ± 3.7	> 80	26.6	55
Ferritin (ng/nL)**	63.9 ± 35.1	30-120	18.4	38
C-Reactive Protein (mg/L)**	0.2 ± 0.2	< 1	2.4	5
Eosinophils (X10^3 cel/µL)*	0.4 ± 0.9	< 0.5	21.7	45
RDW (%)	37.2 ± 2.0	< 14	3.9	8

Figure 1. Association between social class and haemoglobin (A), ferritin (B), Corpuscular Volume Mean (C), and eosinophil (D) levels. p = significance level according to Kruskal-Wallis test. Mean plus or minus standard error of the mean.

Figure 2. Association between haemoglobin levels according to ferritin levels P = significance level according to Kruskal-Wallis test.

Figure 3. Association between haemoglobin levels and eosinophil levels. p = level of significance according to Mann-Whitney U test.

[ABEP] Associação Brasileira de Empresas de Pesquisa. 2008. Dados com base no Levantamento Sócio Econômico – 2005 – IBOPE [Data based on the Socio-Economic Survey – 2005 – IBOPE]; [accesses 2022 Feb 24]. https://www.abep.org/criterio-brasil.

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