jurnal anemia

B a k u , A z e r b a i j a n | 495

INTERNATIONAL JOURNAL Of ACADEMIC RESEARCH Vol. 3. No. 1. January, 2011, Part II

EPIDEMIOLOGY OF IRON DEFICIENCY ANAEMIA: EFFECT ON PHYSICAL GROWTH IN PRIMARY SCHOOL CHILDREN,

THE IMPORTANCE OF HOOKWORMS

Dr. Alaa Ali1, Dr. Gihan A Fathy1, Dr. Hanan A Fathy2, MD. Nagwa Abd El-Ghaffar3

1Child Health Department (NRC), 2National Centre for Radiation Research and Technology, 3Department of Clinical And Chemical Pathology (NRC) (EGYPT)

ABSTRACT Anemia is estimated to affect almost one-half of school-age Children in the developing countries. The

school years are an Opportune time to intervene and interventions must be based on sound epidemiologic understanding of

the problem in this age group. We report on the distribution of iron deficiency and anemia across Age, sex, anthropometric indexes, and parasitic infections in a Representative sample of 400 schoolchildren from Elminopheia district, Egypt. Iron status was assessed by haemoglobin, and serum ferritin from a venous blood sample. The prevalence of iron deficiency in our study was 65% and 55% of anaemia was associated with iron deficiency. An iron deficient child was defined as every Child with either serum iron less than 50 µg/d, or Serum

TIBC more than 400 µg/dL. In our study iron deficiency was more common in children who did not usually have breakfast as opposed to those who did. Children with current parasitic infestations showed a higher frequency of iron deficiency compared to children free from parasitic infestations. Pallor occurred more commonly in iron deficient children. Children with a history of cardiac diseases, pulmonary diseases, rheumatic diseases, renal failure or tumours had significantly heigher frequency of iron deficiency than children who did not. There were no differences between children with parasitic infestation and children without parasitic infestation as regards age, gender, weight, height and BMI.

We conclude that Iron deficient group are more prone to weight retardation. Iron deficiency is more common in children who do not consume breakfast, have chronic disease or have parasitic infestation

Key words: iron deficiency, physical growth, anaemia, Hookworms, schoolchildren. 1. INTRODUCTION Iron deficiency is a significant global problem. It is one of the major public health concern in preschool

children and pregnant women in the developing countries. Many studies have examined these two at-risk groups; there is a paucity of data on anemia in preschool children living in developing countries (1).

Iron deficiency anaemia during pregnancy has been associated with Increased risk for low birth weight, preterm delivery, and perinatal mortality. Iron deficiency is the commonest form of malnutrition worldwide and according to the World Health organization affects 43% of the world’s children (2). Deficiency may be due to inadequate dietary intake of iron, low level of absorption because of small bowel pathology, increased physiological requirements during rapid growth in infancy and adolescence and chronic blood loss usually from the gastrointestinal or urinary tracts or because of menorrhagia in adolescent girls (3).we observed a positive correlation between serum ferritin (SF) and haemoglobin (Hb) concentrations, suggesting that a significant proportion of anaemia cases might be related to iron deficiency (4). Another study showed that higher iron intake is associated with a decreased prevalence of anaemia. However, only one-third of the incidence of anaemia in this study was attributed to iron deficiency suggesting the existence of other causal factors (5).

The aim of the study: This study was undertaken to estimate the prevalence of anaemia and iron deficiency among primary

schoolchildren in elmenopheyia, Egypt, what are the causes and its effect on general growth. 2. SUBJECTS AND METHODS This study was conducted in Elminophyia region as a pilot cross sectional observational study. 500 pupils

were enrolled from the primary schools and aged between 6 and 12 years old. All were recruited for this study with parents consent. 100 children dismissed and refusedfor blood venipuncture. Socio demographic data werecollected with questionnaire filled out by the parents. The socio economic status was defined by the following parameters: the family income, the parent educational status, the number of family members and the working status of the parents. All children included in this study were subjected to:

1) History taking: Laying stress on: - Dietetic history.

496 | www.ijar.lit.az

INTERNATIONAL JOURNAL Of ACADEMIC RESEARCH Vol. 3. No.1. January, 2011, Part II

- History of parasitic infestation (by asking about infestation with parasites or taking any antihelminthics treatment now or before).

- Any Chronic diseases (as renal failure, cardiac diseases, pulmonary diseases, rheumatic diseases or tumours).

2) Examination: Complete clinical examination laying stress on: - General anthropometric measures including: - Height, weight, and BMI: and all the results were compared with the standard curves for age

according to the WHO (2006) (6). - Pulse and blood pressure measurement, described as normal or abnormal for age according to

Robert D (7). - Relevant clinical findings as: - Pallor, jaundice, Fatigue. 3) Laboratory investigations: Sampling : We obtained 3 samples of stool from different locations of the specimen. From each child, 2 ml of venous blood sample was collected using a syringe for measurement of

hemoglobin concentration and serum iron. 1. Hemoglobin concentration: Directly measured using a spectrophotometer (Hemoglobin meter). (8) 2. Stool examination: By ordinary light microscope to detect any parasites which could be the cause of anemia. 3. Iron and total iron binding capacity: Was done by clorometric kits produced by STANBIO Company (United States of America). 3. THE RESULTS Our results are illustrated in the following tables. 400 primary school Children were studied over the period

from January 2008 to june 2009: 232 girls (58%) and 168 boys (42%)

Table 1. The clinical and laboratory parameters of the studied children.

Parameters Mean SD Age (years) 9.0 7.6 Weight (Kg) 25.1 6.3 Height (cm) 128.1 18.6 BMI (Kg/m2) 24.5 5.8 Systolic blood pressure (mmHg) 90.5 10.2 Diastolic blood pressure (mmHg) 64.7 5.9 Pulse (bpm) 80.6 4.4 Hemoglobin (g/dl) 9.8 4.6 Serum iron (g/dl) 70.4 22.9 Serum TIBC (g/dl) 439.62 129.7

This table shows the range, mean value and standard deviation for tested parameters in our study

population.

Table 2. The frequency of the studied parameters in the whole studied children

Parameters Yes (positive) No (negative) Breakfast intake 168 (42%) 232 (58%) History of parasitic infestation 140 (35%) 260(65%) History of chronic diseases and drug intake 28(7%) 372 (93%) Pallor 140 (35%) 260(65%) Presence of parasitic infestations in stools 180(45%) 220(55%)

This table illustrates the qualitative parameters of our study population. A history of parasitic infestation was present in 35% of our study population, whilst presence of a parasite

in stools was documented in 45%. The majority of our study population were not pale (65%).



Table 3. The frequency of iron deficiency in the studied children

Items Frequency % Iron deficiency 220 55 Non iron deficiency 180 45

The prevalence of iron deficiency in our study was 56%. An iron deficient child was defined as every child

with either serum iron less than 50 µg/d, or Serum TIBC more than 400 µg/dL in our study. Table 4. Comparison of the various clinical and laboratory parameters between iron and non iron

deficient children (MeanSD).

Parameters Iron deficiency Non iron deficiency P Age (years) 9.0 4.7 8.9 5.6 >0.05 Weight (kg) 25.8 4.8 26.01 4.3 <0.05 Height (cm) 127.3 17.2 127.9 18.1 >0.05 BMI (Kg/m2) 23.26.4 25.5 7.0 <0.05 Hemoglobin (g/dl) 9.6 3.2 10.2 3.1 <0.01 Serum iron(g/dl) 40.8 10.2 89.817.6 <0.001 Serum TIBC (g/dl) 476.3 99.7 354.9 78.4 <0.001

Iron deficiency was found in 220 children. There were no statistically significant differences between iron

deficient and non iron deficient groups as regards age, gender or height (P > 0.05). Iron deficient children had significantly lower values for weight (P < 0.01), BMI (P < 0.01) and hemoglobin

concentration (P<0.01) than non iron deficient children.

Table 5. Comparison between iron deficient and non iron deficient children as regards possible contributing factors to iron deficiency

Items Iron deficiency

Number %

Non iron deficiency Number %

P

Breakfast 64 16 104 26 <0.01

No breakfast 156 39 76 19 History of parasitic infestation 48 12 92 23

>0.05 No history of parasitic infestation 172 43 88 22

History of chronic conditions & drug intake 20 5 8 2 <0.001

No history of chronic conditions & drug intake

200 50 172 43

Presence of Parasitic infestation in stools 120 30 60 15 <0.001 Absence of Parasitic infestation in stools 100 25 120 30

This table shows that iron deficiency was more common in children who did not usually have breakfast as

opposed to those who did. This difference was statistically significant (P < 0.01). There were no statistically significant differences between the iron deficient and non iron deficient children

as regards the history of parasitic infestation (P > 0.05). Children with a history of cardiac diseases, pulmonary diseases, rheumatic diseases, renal failure or

tumours had significantly higher frequency of iron deficiency than children who did not (P < 0.01). Children with current parasitic infestations showed a higher frequency of iron deficiency compared to

children free from parasitic infestations. This difference was highly statistically significant (P < 0.001).

Table 7. The relationship between iron deficiency and pallor.

Items Iron deficiency Number %

Non iron deficiency Number %

P

Presence of pallor 116 29 24 6 <0.001

Absence of pallor 104 26 156 39

Pallor occurred more commonly in iron deficient children. This difference was statistically significant

(P < 0.01).



Table 8. Comparison between children with and without parasitic infestation as regards various clinical and laboratory parameters (MeanSD)

Parameters Parasitic infestation Absence of parasitic

infestation P

Age (years) 9.1 3.2 8.92.4 >0.05 Weight (Kg) 25.64.5 26.013.8 >0.05

Hemoglobin (g/dl) 9.53.8 10.42.4 <0.001 Serum iron (g/dl) 45.912.6 95.413.9 <0.001

Serum TIBC (g/dl) 467.891.6 342.987.6 <0.001 There were no statistically significant differences between children with parasitic infestation and children

without parasitic infestation as regards age, gender, weight, height and BMI (P >0.05). 4. DISCUSSION Iron deficiency anemia is one of the world’s most widespread health problems especially among children:

approximately 40 percent of children are anemic across various African and Asian settings (9). Iron deficiency anemia leads to weakness, poor physical growth, and a compromised immune system –

decreasing the ability to fight infections and increasing morbidity – and is also thought to impair cognitive performance and delay psychomotor development. Iron deficiency is the most common form of nutritional deficiency in childhood, affecting all socio-economic levels of society (10).

It is a major public health concern in preschool children and pregnant women in the developing countries. Many studies have examined these two at-risk groups; there is a paucity of data on anemia in school children living in developing countries (11).

The aim of this work was to assess the prevalence of iron deficiency in school children in EL-Minopheyia district, its probable Causes and its effect on general growth

In order to achieve these objectives, this work was conducted on 400 children between 7-12 years in primary schools in EL Minopeyia district governorate, chosen as a consecutive random sample. All children were subjected to full history taking, anthropometric parameters, and stool examination, estimation of hemoglobin concentration, serum iron, and serum iron binding capacity.

In our study the prevalence of iron deficiency was 65% among the primary school children in El Minopheyia district, and 55% of them were also anemic (IDA) .

Our study results concur with the WHO (12) data on global rates of iron deficiency in developing countries that show 46% of children of school age are iron deficient.

Also Bobonis et al. (2006)(13) reported that studies performed in developing countries such as India have demonstrated values around 69% for the prevalence of iron deficiency in the 2-6 age group.

Olney and Kariger (2007)(14) measured serum iron in 771 child in Pemba, Zanzibar, Tanzania, and about 77% of them were iron deficient.

Our findings are similar to the results of the survey conducted by El-Zanaty et al. (2005)(15) on Egyptian school children in Alexandria governorate, which showed that about 30.3% of them were iron deficient anemics.

Also our results agree with the results of a study conducted by Aboussaleh et al. (2004)(16) on 306 pupils from seven primary schools in the province of Kenitra in Morocco. They found that more than 30% of these children had iron deficiency anemia. Prevalence did not differ by sex.

On the other hand, a study conducted by Manzoor et al. (2003)(17) on 1100 primary school children in the province of Lahore in Pakistan, revealed that the prevalence of iron deficiency anemia was 10.5%.

This is also in accordance with Soliman et al. (2009)(18) who reported that iron deficiency anemia IDA during the first 2 years of life significantly impairs growth, and there is a significantly correlation between growth velocity (GV) and serum ferritin concentration.

The majority of these studies are in agreement with our study results, since all these studies were done in developing countries with a similar environment and causes of iron deficiency. Defference in between studies could be contributed to different age groups studied and methodology of assessment of iron deficieny anemia.

The high prevalence of iron deficiency among this age group is explained by the increased needs for iron due to rapid growth, low intake of iron-rich foods, inappropriate dietary choices, intestinal parasitic infestation and frequent consumption of tea with meals, all or in various combinations (19).

● The children were classified according to the results of serum iron into iron deficient and non iron deficient groups.

Our study showed that iron deficient children had lower weights and BMI than non-iron deficient children. Similarly iron deficient children with anemia had significantly lower weight and BMI than deficient children without anemia.

In our study there were no statistically significant differences between the iron deficient and non-iron deficient groups as regards the height. Waterlow (20) reported that, etiology of linear growth retardation is multi-factorial but has been explained by three major factors: poor nutrition, high levels of infection and problematic mother-infant interaction, which is closely related to the socio-economic status of the family.

This is in accordance with the findings of Ramakrishnan et al. (2004)(21)who reported that there is no statistically significant effect of iron supplementation on height-for-age in children.



This is explained by Beckett et al. (2000)(22), who reported that observational studies have postulated a positive effect on physical growth due to indirect effects of iron supplementation – improvement in immunity leading to decreased incidence of infections, and improvement in appetite and consequently the intake of energy. Most of studies are from developing countries, that have marginal food availability and poor feeding practices, where improvement in the appetite and activity levels of the child may not translate in to increased energy intake, and therefore enhanced height gain.

In our study parasitic infestation was present in 35% of the children; Ascaris, Oxyuris, Entamoeba histolytica, and Giardia lamblia were the most frequent parasites. Children with iron deficiency had a significantly higher frequency of parasitic infestation. Similarly, iron deficiency anemic (IDA) children had a significantly higher frequency of parasitic infestations compared to iron deficiency non-anemic (IDNA) children.

This agrees with the results of a study conducted by Magbool et al. (2007)(23) on 978 school children in the villages of district Skardu, Pakistan, under school health care program 2004. It revealed that the prevalence of intestinal parasites was 54.91%; Ascaris, Giardia lamblia, Entamoeba histolytica, and Oxyuris were the most frequent forms. They found an associatation between the intestinal parasitic infestations and iron deficiency anemia in school children.

Our results also agree with the results of a survey conducted by Wani et al. (2007)(24) on 514 schoolchildren enrolled in various schools in Srinagar City, Kashmir, India. They found that 46.7% of students had one or more parasites, and there was a relation between iron deficiency anemia and hookworm infestations.

This is explained by the fact that blood loss (mostly occult bleeding), reduced appetite, impaired digestion, and malabsorption may be the causes of poor iron status and iron deficiency anemia that are frequently observed in children suffering from intestinal parasitic infestations(25) .

Our study showed that iron deficiency was more common in children who did not usually have breakfast as opposed to those who did. Similarly missing the breakfast meal was significantly more common in the iron deficient anemic (IDA) children than in iron deficient non-anemic (IDNA) children.

This is explained by Ramzy (2000)(26), who reported that children who ate breakfast were two to five times more likely to consume at least two-thirds of the recommended amounts of most vitamins and minerals, including iron. Intakes of vitamins and minerals, including zinc, calcium, and folic acid, were much higher among the breakfast eaters, while fat consumption was lower. The nutrients missed when children skip breakfast are rarely recouped during other meals.

In our study there were no statistically significant differences between the iron deficient and non-iron deficient groups as regards the height.

In our study Pallor occurred more commonly in iron deficient children. This difference was statistically significant (P < 0.01).

5. CONCLUSIONS Iron deficient group are more prone to weight retardation. Iron deficiency is more common in children who do not consume breakfast, have chronic disease or have

parasitic infestation. Verster and Van-der-pols (2004)(27)reported that the prevalence of iron deficiency in school age in

the Eastern Mediterranean region ranged from around 20% in Jordan, to more than 60% in parts of Egypt and Oman.

6. RECOMMENDATIONS In light of this study we recommend the following : I- Arrangement of campaigns through the mass media to highlight the hazards of iron deficiency and iron

deficiency anemia and to explain the ways that can reduce the disease.

II- Implementing a well baby clinic in all health facilities for : - Early detection and treatment of iron deficiency anemia. - Early detection and treatment of parasitic infestation. - Encouraging the ingestion of breakfast.

III- Fortification of food with iron to reduce the magnitude of the problem in Egypt.

REFERENCES

1. Leenstra T., Oloo A.J., Kariuki S.K., Kurtis J.D., and Kager P.A. (2004): "Prevalence and severity of

anemia and iron deficiency in school girls in western Kenya". European Journal of Clinical Nutrition; 58: 681-21.

2. De Maeyer E. & Adiels-Teasman M. The prevalence of anaemia in the world. World Health Statistical Quarterly 1985; 38, 302–316.

3. World Health Organisation/United Nations University/UNICEF (2001) Iron Deficiency Anaemia, Assessment, Prevention and Control: a Guide for Programme Managers. WHO, Geneva, Switzerland



4. Ministry for the Public health. 2001, deficiency of micronutrients: Extent of the Problem and strategies of fight Programs of fight against the disorders due to the deficiencies in micronutriments. Morocco.

5. Aboussaleh Y., Ahami AOT, Alaoui L, Delisle H. Prevalence of anaemia at the school preadolescents in the province of Kenitra in Morocco. Cahiers d'etudes et de recherches francophones / Sante . Volume 14, Numero 1, 37-42, Janvier- Fevrier-Mars 2004.

6. WHO (2006): "Child Growth Standards based on length/height, weight and age". Acta Paediatrica Suppl; 450: 76-85.

7. Robert D. (2000): "General examinnation". In: Nelson W., Behrman R., Kliegman R., and Arvin A., (eds). Nelson textbook of Pediatrics, (16th ed.) W.B. Sawnders Company.

8. Daves D.M., Lyton F.A., Ofori A.S., and Green S.C. (2001): "Several methods exist for investigation of IDA". Analytical Biochemistry Journal; 298: 76-82.

9. Hall, Andrew et al (2001). “Anaemia in schoolchildren in eight countries in Africa and Asia”. Public Health Nutrition, 4(3) 749-756

10. Scott P.J. (2007): "Iron deficiency anemia". In: Behrman R.E., Kliegman R.M., Jonson H.B., Zitelli B.J., Stanton B.F. and Davis H.W., (eds), Nelson text book of pediatrics. (18th ed). W.B. Saunders company; Vol 2: 1239.

11. Leenstra T., Oloo A.J., Kariuki S.K., Kurtis J.D., and Kager P.A. (2004): "Prevalence and severity of anemia and iron deficiency in school girls in western Kenya". European Journal of Clinical Nutrition; 58: 681-21.

12. WHO (2001): "Iron deficiency anaemia: assessment, prevention, and control. a guide for programme managers". Geneva, Switzerland: World Health Organization. (WHO/NHD/01.3.).

13. Bobonis, Gustavo J., Edward M., and Charu P. (2006): "Anemia and school participation". Journal of Human Resources; 41: 692–721.

14. Olney D.K., and Kariger P.K. (2007): "Zanzibari Children with Iron Deficiency". Journal of Nutrition; 137: 2756-2762.

15. El-Zanaty F., Way A., Wierzba T., El-Yazeed R., Savarino S., Mourad A., Rao M., and Baddour M. (2005): "WHO global database on child growth and malnutrition". Egypt Demographic and Health Survey. Cairo, Ministry of Health and Population, National Population Council.

16. Aboussaleh Y., Ahami A., Alaoui L., and Delisle H. (2004): "Prevalence of anemia among schoolchildren in the province of Kenitra in Morocco". Sante; 14: 37-42.

17. Manzoor A., Muhammed T., and Tahira T. (2003): "Anemia in school children". Pakistan Postgraduate Medical Journal; 14: 44-47.

18. Soliman A.T., Al-Dabbagh M.M., Habboub A.H., Adel A., and El-Taib M.G. (2009): "Linear Growth in Children with Iron Deficiency Anemia Before and After Treatment". Journal of Tropical Pediatrics; 10: 1093-1093.

19. Al-Sharbatti S., Al-Ward N., and Al-Timmi D. (2003): "Anaemia among adolescents: a study of risk factors". Saudi Medical Journal; 24: 189–194.

20. Waterlow, J.C., 1994. Introduction, causes and mechanisms of linear growth retardation (stunting). Eur. J. Clin. Nutr., 48(1): S1-4

21. Ramakrishnan U., Aburto N., McCabe G. and Martorell R. (2004): "Multimicronutrient interventions but not vitamin A or iron interventions alone improve child growth: Results of meta-analyses". Journal of Nutrition; 134: 2592-2602.

22. Beckett C., Durnin J., Aitchison T., and Pollitt E. (2000): "Effects of an energy and micronutrient supplement on anthropometry in undernourished children in Indonesia". European Journal of Clinical Nutrition; 54: 52–59.

23. Maqbool A., Abdul-Latif K., and Mohammad T. (2007): "Anemia and intestinal parasitic infestations in school children". Pakistan Armed Forces Medical Journal; 57: 77-81.

24. Wani S.A., Ahmad F., Zargar S.A., and Ahmad Z. (2007): "Prevalence of Intestinal Parasites and Associated Risk Factors among Schoolchildren in Srinagar City, Kashmir, India". Journal of Parasitology; 93: 1541-1543.

25. Binay K.S. and Lubna A. B. (2005): "Association of anemia with parasitic infestation in Nepalese women: results from a hospital-based study done in eastern Nepal". Journal of Ayub Medical College; 17: 5-9.

26. Ramzy J.S. (2000): "Importance of breakfast meal in covering the nutrients for children and adolescents". Journal of Adolescent Health; 27: 314-321.

27. Verster and Van-der-pols: Iron deficiency anaemia – an old enemy Eastern Mediterranean Health Journal, Vol. 10, No. 6, 2004.

jurnal anemia

Documents