Prevalence of Anaemia among Adolescent Girls: A One Year Cross-Sectional Study
Correspondence Address :
Shilpa S. Biradar, MD
Asst. Prof, Dept of Pathology
SN Medical College, Bagalkot - 587102
Introduction: India has the worldâs highest prevalence of iron deficiency anaemia among women, with 60 to 70 percent of the adolescent girls being anaemic. Adolescence is considered as a nutritionally critical period of life. The pre-pregnancy nutritional status of young girls is important as it impacts on the course and the outcome of their pregnancy. Hence, the health of adolescent girls demands special attention.
Objectives: To assess the prevalence and the severity of anaemia among adolescent girls in rural areas; To study the association of anaemia with respect to the age of the participants and their socio-economic status.
Materials and Methods: The present study was a cross-sectional study which was conducted for a period of one year from Jan 2008 â Dec 2008 at villages which were under Vantamuri PHC, a field practice area of J.N Medical College, Belgaum. A total of 840 adolescent girls (10-19 years of age) were included in the study. A pre-designed and pre-tested proforma was used to obtain the details of the socio-demographic variables. A relevant clinical examination of the participants was done. Following this, 2ml of blood was obtained by venipuncture. The blood samples were analyzed by using an automated cell counter. The diagnosis was established as anaemia when the haemoglobin level was less than 12gm/dl.
Results: The prevalence of anaemia was 41.1% (with that of severe anaemia being 0.6%, that of moderate anaemia being 6.3% and that of mild anaemia being 34.6%. It was observed that the prevalence of anaemia was high in late adolescents (15-19yrs) as compared to that in the early adolescents (10-14yrs). A majority of the girls had mild anaemia.The prevalence of anaemia was considerably high among the girls who belonged to the low socio-economic status.
Conclusion: A high prevalence of anaemia was found among the adolescent girls, which was considerably high in the late adolescents. There was a significant association of anaemia with the socio-economic status. The prevalence of anaemia was high in girls who belonged to the low socio-economic status.
Anaemia, Adolescent girls, Prevalence
Anaemia is the most prevalent nutritional problem worldwide and it is mainly caused due to iron deficiency. Its prevalence is highest among young children and women of childbearing age; particularly in pregnant women (1). The prevalence of anaemia is disproportionately high in the developing countries, due to poverty, inadequate diet, worm infestations, pregnancy/lactation and poor access to the health services (2). The worldâs adolescent population is facing a series of serious nutritional challenges which are not only affecting their growth and development but also their livelihood as adults. Yet, adolescents remain a largely neglected, difficult- to- measure and hard -to- reach population, in which the needs of adolescent girls in particular, are often ignored (3).
The word adolescence is derived from the Latin word, âadolescereâ; meaning âto grow, to matureâ (4). The WHO has defined adolescence as the age period between 10 to 19 years of age for both the sexes (married and unmarried). There are about 1.2 billion adolescents in the world, which is equal to 1/5th of the worldâs population and their numbers are increasing. Out of these, 5 million adolescents are living in developing countries. Indiaâs population has reached the 1 billion mark, out of which 21% are adolescents (5).
Adolescence more broadly refers to the phase of human development which encompasses the transition from childhood to adulthood. This period is very crucial, since these are the formative years in the life of an individual, when major physical, psychological and behavioural changes take place. The nutritional and the health needs of the adolescents are also more because of the growth spurt and the increase in physical activity in them (6). In females, adolescence marks the beginning of the menstrual cycle or reproduction. Adolescents gain 30% of their adult weight and more than 20% of their adult height between 10-19 years, which we call as growth spurt (7).
Adolescent girls are at a high risk for anaemia and malnutrition. Inadequate nutrition during adolescence can have serious consequences throughout the reproductive years of life and beyond (4). Very often, in India, girls get married and pregnant even before the growth period is over, thus doubling the risk for anaemia (8). The nutritional anaemia in adolescent girls attributes to the high maternal mortality rate, the high incidence of low birth weight babies, high perinatal mortality and the consequent high fertility rates.This phase of life is also important due to the ever-increasing evidence that the control of anaemia in pregnant women can be more easily achieved if a satisfactory iron status can be ensuredduring adolescence (2). About 43% of the adolescent deaths are related to pregnancy. Pregnancy during adolescence deprives the girls from achieving their full growth according to their genetic potential (9).
Anaemia D efinition: Anaemia is said to be present when the haemoglobin level in the blood is below the lower extreme of the normal range for the age and sex of the individual (10). N ormal haemoglobin range according to age (11):
According to the WHO criteria, the cut off level of the haemoglobin concentration in blood for the diagnosis of anaemia is less than 11gm/dl for pregnant women and for children who are aged between 6 months and 6 years, less than 12 gm/dl for non-pregnant women and children who are aged 6-14 years old, and less than 13 gm/dl for adult males (12). As compared to the vast amount of work which has been done in pregnant mothers and young children, there are relatively few published studies on the prevalence of anaemia among adolescent girls. The data on the prevalence of anaemia among the rural adolescents is scarce, particularly in a rural community setup. Meaningful programmes cannot be implemented without sufficient data. Therefore, the present study was undertaken to assess the prevalence of anaemia among adolescent girls who belonged to the rural communities.
Study Design The present study was a cross-sectional study which was conducted at villages which were under Vantamuri PHC, a field practice area which was attached to J.N Medical College, Belgaum. The study period was one year and it was from January 2008 to December 2008. Vantamuri PHC is situated 22 kilometers away from Belgaum city. This study was approved by the institutional ethics committee for human subjects research of J.N. Medical College.
Source of the Data I nclusion criteria: Girls of the age group of 10-19 years Selection of the participants: All the girls of the age group of 10-19 years, who attended the government primary and high schools in the study area, were included in the study. The participants were informed about the study and informed consent was obtained from the heads of the schools as well as the participants. A pre-designed and pre-tested proforma was used to collect the information about the participants. A brief, relevant clinical examination was also done.
Sample size - 840: The following formula was used to calculate the sample size: n = 4 p q/d2p = Percentage of the study participants with anaemia = 48.75 q = Percentage of the study participants without anaemia = (100-p) = 51.25 d = Allowable error (taken as 10% of this study) = 4.87 4 Ă 48.75 Ă 51.25 Hence, n = = 420 4.87 Ă 4.87 Cluster sampling was done for the complete coverage of the study area. Therefore, 420 + 420 = 840L ist of variables: Age was recorded to the nearest completed years and was determined from the register of the school. The adolescence period was classified as early and late adolescence. Classification of the adolescents: (13) Early adolescence: 10-14 yrs Late adolescence: 15-19 yrs
Socio-economic status: Information regarding the per capita income ( in rupees/month) was collected and the socio-economic status was classified by using the Modified B G Prasadâs classification for the study period (2008-09), which was calculated by multiplying the multiplication factor (2008-09) with the Prasadâs classification values of the year 1961 (14).
As the study period was from January 2008 to December 2008, the average consumer price index for that period (2008 - 09) was taken (15). The modification was done with the aid of the multiplication factor (M.F), which was obtained as below: Average consumer price index for the study period (2008â09) M.F = Ă 4.93 100 439.33 = Ă 4.93 = 21.658 ~ 21.66 100
Data collection Collection of the blood samples: 2ml of venous blood was drawn by venipuncture (antecubital vein) under aseptic precautions and it was collected in EDTA (Ethylenediamine tetraacetic acid) vacutainers. EDTA acts as an anticoagulant. The collected blood samples were analyzed in the Department of Pathology, KLEâsDr.Prabhakar Kore Hospital and Medical Research Centre, which was attached to J.N.Medical college, Belgaum. A nalysis of the blood samples: The samples were analyzed by using an automated cell counter (Beckman Coulter AC T diff 2).
Classification of the anaemia according to its severity: (7)
Data analysis: Codes were prepared for the options of the proforma. The master chart was prepared by using the EXCEL2007 software (Annexure V). The SPSS software was used for the analysis of the data. Tables and graphs were prepared by using the Microsoft Windows 2007 software. Chi-square test was used for the statistical analysis. The differences were considered as significant at a p value of <0.05.
The present study was a cross-sectional study which was conducted at villages which were under Vantamuri PHC. It included 840 adolescent girls who attended government schools. The overall prevalence of anaemia was 41.1%. 345 out of 840 adolescent girls had varying severity of anaemia. Anaemia was absent in 58.9% of the girls. Out of the 840 adolescent girls, 290 (34.6%) were mildly anaemic, 53(6.3%) were moderately anaemic and 2(0.2%) were severely anaemic.
A majority of the girls were in the age group of 10-14 years. There were no participants in the age group of 19 years. â˘ The range of haemoglobin among the participants was 5.3-14.9gms/dl. â˘ The mean haemoglobin level among the anaemic girls was 10.9+1.04gms/dl. â˘ The mean haemoglobin level among the non-anaemic girls was 12.80+.5gms/dl. The prevalence of anaemia was more in girls who were 10 years of age and in girls who were more than 14 years of age. One of the participants who was 18 years old was non-anaemic. Out of the 840 girls, 755 (89.9%) were in the age group of 10-14 years, whereas only 85(10.1%) were in the age group of 15-19 years.
Thus, a majority of the girls were in the age group of 10-14 years. The prevalence of anaemia among the late adolescents was 60%, whereas; it was 38.9% among the early adolescents. This was found to be statistically significant. Thus, the prevalence of anaemia was high among the late adolescents (15-19yrs) as compared to the early adolescents (10-14yrs). In the present study, out of the 840 adolescent girls, a majority (84.2%) belonged to the socio-economic class IV, whereas 11.5% of them belonged to class III and only 4.3% belonged to class V. None of the girls belonged to classes I and II. The prevalence of anaemia among the girls who belonged to class III was 4.1%, whereas it was 43.1% in girls of class IV and 100% in girls of class V. This was found to be statistically significant. Thus,the prevalence of anaemia was high among girls who belonged to the lower socio-economic groups.
Anaemia is a major public health concern in pre-school children and pregnant women in the developing world. While many studies have examined these two at-risk groups, there is a paucity of data on anaemia among adolescents who were living in developing countries, in the complex ecologic context of poverty and malnutrition (16). It is becoming increasingly evident that the control of anaemia in pregnant women can be more easily achieved if a satisfactory iron status can be ensured in the adolescent females prior to marriage (17).
The reasons for the high incidence of anaemia among the adolescent girls are: â˘ Increased iron requirements because of growth â˘ Menstrual loss â˘ Discrepancy between high iron need for haemoglobin formation and low intake of iron containing foods â˘ Erratic eating habits, dislike for foods which are rich in iron, like green leafy vegetables â˘ Iron absorption inhibitors in food: phytates/tannins (6) The following cutoff points which were suggested by the WHO were used to determine whether iron deficiency anaemia was a major problem among the general population: (6).
In the present study, it was found that out of 840 girls, 345 (41.1 %) were suffering from various degrees of anaemia and that 495 (59.9 %) were non-anaemic. This indicated that it was a public health problem of high magnitude as per the WHO guidelines. In a multi-country study on the nutritional status of adolescents, which was carried out by the International Centre for Research on Women (ICRW), anaemia was found to be the most widespread nutritional problem and its prevalence ranged from 32-55% (18). A study which was conducted in the rural areas of Tamilnadu revealed that the prevalence of anaemia among the adolescent girls was 44.8% (19).
Another study which was conducted among the girls who belonged to the low income families in Vadodara, revealed that 67% of the adolescent girls were anaemic (20). Studies which were conducted in rural Wardha and Lucknow to estimate the prevalence of anaemia among adolescent girls, found that the prevalence of anaemia in those areas was 59.8% and 56% respectively (21). In a study which was conducted in rural South India, it was found that 30% of the adolescent girls were anaemic (22). Thus, the results of various studies which have been mentioned above, demonstrated that the prevalence of anaemia in this study was high as in other parts of the country. This indicated the importance of including adolescents in the risk group to improve their iron status and the need for planning intervention programs that would increase the haemoglobin levels among the adolescent girls through prophylaxis treatment, dietary modification and helminth control.
Prevalence of anaemia according to the severity: (Table/Fig 2) In our study, the prevalence of severe anaemia was 0.2%, that of moderate anaemia was 6.3% and that of mild anaemia was 33%. In a study which was conducted in rural Tamilnadu, the prevalence of severe anaemia was found to be 2%, that of moderate anaemia was 6.3% and that of mild anaemia was 36.5% (19). Similar results were seen in a study which was conducted in three districts of Orissa to assess the haemoglobin status of non-school going adolescent girls, in which it was revealed that 96.5% of the subjects were anaemic, of which, 45.2%, 46.9% and 4.4% were found to have mild, moderate and severe anaemia respectively (23). Another study which was conducted in rural Wardha showed the prevalence of severe, moderate and mild anaemia to be 0.6%, 20.8% and 38.4% respectively (2). A study which was conducted among school going girls in Ahmedabad revealed that 55.2% were mildly anaemic, 44.9% were moderately anaemic and that 0.6% were severely anaemic (24).
The high prevalence of mild and moderate anaemia demands due emphasis on iron and folic acid supplementation and health education on the consumption of iron rich foods, so as to bring down the total prevalence of anaemia among the adolescent girls. A naemia with respect to age: (Table/Fig 3), ,(Table/Fig 4),(Table/Fig 5) In the present study, anaemia was more prevalent in girls of 10 years of age and among girls who were more than 14 years of age. A study which was conducted in rural Tamil Nadu to assess the prevalence of anaemia among adolescent girls, found that there was reduction in the mean Hb as the age increased. This decreasing trend of haemoglobin with increasing age was not seen in our study (19).
A naemia with respect to the age group (early and late adolescents): (Table/Fig 5),(Table/Fig 6) In our study, we found that anaemia was more prevalent in girls who were more than 14 years of age as compared to girls who were less than 14 years of age. A study which was conducted in Haryana on 110 adolescent girls who belonged to low socio-economic groups, found that anaemia was more prevalent in girls who were more than 14 years of age (25). Thus, the high prevalence of anaemia among girls who were more than 14 years of age could be related to menstrual loss.
Anaemia with respect to the socio-economic status: (Table/Fig 7),(Table/Fig 8) In the present study, the prevalence of anaemia was high among girls who belonged to lower socio-economic groups (43.1% in class IV and 100% in class V) as compared to the girls who belonged to higher socio-economic groups (4.1% in class III). This was statistically significant. These findings correlated with those of the studies which were conducted among adolescent girls in Chandigarh, Nagpur, UP and Delhi, where it was revealed that anaemia was high in the lower socio-economic groups (18), (26), (27), (28). A significant association of anaemia with the low socio-economic status suggested a need to develop strategies for intensive adult education and to improve the socio-economic status of the population through poverty alleviation programs.
In conclusion, the present study revealed anaemia to be a major health problem among the adolescent girls in rural areas. The prevalence of anaemia was more among girls who were more than 14 years of age. There was a higher prevalence of mild anaemia as compared to moderate and severe anaemia. The prevalence of anaemia was high among girls who had attained menarche. There was a higher prevalence of anaemia among girls who belonged to the lower socio-economic groups.
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Date of Submission: Jul 04, 2011
Date of Peer Review: Sep 10, 2011
Date of Acceptance: Dec 23, 2011
Date of Publishing: May 01, 2012
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