The present study was a cross-sectional descriptive study undertaken in a central school in Surathkal, Dakshina Kannada district, Karnataka state, India, in November 2011. This area consists of immigrants from different states of the country in view of the various industrial factories, Engineering and Medical Colleges in the vicinity. The present school was selected as this is the only central school in this area and shows a fair representation of children of all social levels. Since the information on school going children of this region is lacking, the present investigation was undertaken with the objective to assess the nutritional status of these children and to screen for the common health problems affecting them.

Total of 755 school children aged between 4 and 16y from nursery till 10^th standard were examined. All children attending school at the time of survey were included. Expert Team included paediatrician, dentist, refractions and trained nurses. Children were examined for

Date of birth was taken from the school record and decimal age was calculated. Body weight was measured in minimal clothing to the nearest 0.1kg using a beam scale. Height was recorded in centimetres on a stadiometer. BMI was calculated using the formula weight (kg) divided by height in meter². Height, weight and BMI were plotted on CDC (http://www.cdc.gov/growthchart) and Agarwal (http://www.indianpediatrics.net/mar2007) centile charts.

Blood Pressure (BP) measurements were taken by a trained nurse using mercury sphygmomanometer and appropriate sized cuff .The normative values were based on the ‘Fourth report on the Diagnosis, Evaluation and Treatment of High Blood Pressure in Children and Adolescents’. On the basis of these Blood Pressure (BP) centiles were computed for each age group, gender wise both for systolic and diastolic BP. Abnormal values were rechecked and confirmed thrice after adequate rest.

The examination of skin was done by naked eye and torch was used whenever needed. Students were screened for eye disorders by visual acuity testing and anterior segment torch light examination. A Snellens chart was hung on the wall and students were made to stand at a distance of six meter. Readings more than 6/9 were taken as having refractory error. Head to toe examination was done for deformities, scoliosis and systemic examination was done for gross abnormalities.

Dental evaluation was done by an experienced Dentist. Dental examination mirrors, explorers and a doctor’s-pen-light were used for intra-oral examination.

Short stature was defined as height below 3^rd centile for the age and gender. Tall stature was defined as height >97^th centile for age and sex. Normal weight for height was defined as BMI greater than 5^th centile but less than 85^th centile. BMI values less than 5^th centile is considered as thinness, 85^th-95^th centile as overweight and more than 95^th centile as obesity.

Hypertension was defined as SBP and/or DBP≥ 95^th centile for age, gender and height centile. Prehypertension was defined as BP reading > 90^th centile and less than 95^th centile.

Children noted to have abnormalities during screening were asked to come to hospital for detailed evaluation and investigations.

Chi-square test and Student’s unpaired t-test was used to do this analysis. A statistical package SPSS vers. 17.0 were used. p<0.05 was considered as significant.

Total of 755 children from nursery up to 10^th standard were examined. Among these 392 (51.9%) were females and 363 (48.1%) were males. Age group ranged from 4 to 16y.

Mean weight and height are listed on [Table/Fig-1]. Mean height and weight of boys and girls were similar till 10 y of age. From 10 till 14 y, weight and height of girls were more than boys. After 14y, boys had higher weight and height than girls. This may be due to early onset of puberty in girls. On Agarwal chart 72 (9.5%) had weight <3^rd centile and 29 (3.8%) weighed >97^th centile. On CDC chart, 229 (30.3%) were <3^rd centile and 5(0.7%) were >97^th centile. The number of children with weight<3^rd centile were significantly higher when CDC chart was used as compared to Agarwal charts (p<0.001) [Table/Fig-2].

Children with short stature was noted to be significantly higher when plotted on CDC chart (11.3%) compared to Agarwal charts (3%).Incidence of both tall and short stature was similar among both the sexes.

Thinness was significantly higher on CDC chart (37.5%) compared to Agarwal (23.8%) chart (p<0.001).Seventy one (9.4%) were overweight on Agarwal chart in comparison with 45 (5.9%) on CDC and this difference was statistically significant (p-0.024). Incidence of obesity was similar on both the charts (2.6 and 2.4%). The difference in the incidence of under nutrition, overweight and obesity was statistically insignificant between males and females [Table/Fig-3].

Majority of children had normal BP readings.Mean BP values are shown in [Table/Fig-4]. Six of the children (0.8%) were hypertensive and 14 (1.9%) had pre hypertension [Table/Fig-4].

Other abnormalities noted on examination include anemia, blepharitis, vitamin deficiency, DNS, Alopecia, Adenoma sebaceum, Absent DAOM,Torticolis, ptosis, limb shortening and scoliosis [Table/Fig-5]. Cardiovascular abnormalities were noted in 4 children.

Major skin condition noted was T versicolor in 27 children (3.6%) followed by acne, atopy and impetigo.

Four children complained of dimness of vision and 3 were noted to have squint during examination.

Snellens was performed on 686 students as LKG students were not cooperative for the same.

127(18.5%) had visual defects on Snellens chart. Among these 15 were already on spectacles.112 (16.3%) had undetected refractory error.

Among the dental problems, highest prevalence was caries (22.9%) followed by calculus (15%), malocclusion (7.4%) and cross bite (1.5%).

School health screening programmes are often the best way to detect problems that interfere with student’s education. Screening should be carried out by trained individuals and appropriate referrals should be made if needed.

Anthropometric data are widely used to estimate the nutritional status of children. The height and weight of a child are useful indices of development, reflecting the various influences on growth, including nutrition [1]. Height and weight of healthy children varies in different parts of the world, due to varied ethnicity and cultural background. Centile charts have been developed to represent height and weight in a standard format. These centile charts represent the average population of children from certain areas along with standard deviations.CDC (Centre for Disease control) and NCHS charts are such examples of such charts used worldwide [2]. Agarwal charts are recommended for use by the Growth Monitoring Guidelines Consensus Meeting of the IAP [3]. 2007 Affluent Indian Growth Charts is also available for growth monitoring [4]

In our study, weight and heights were plotted on both CDC and Agarwal charts. Children with weight<3^rd centile and stunting were significantly higher when plotted on CDC charts than on Agarwal chart. This could emphasize environmental and ethnic or genetic influence on growth. Hence, use of CDC charts is likely to over diagnose prevalence of under nutrition and stunting in Indian children. In Study by Aziz S et al., on Pakistan children prevalence of stunting was 14% [5].

BMI is the ratio of an individual's weight to height in metres squared (kg/m²) and is used to estimate a person's risk of weight-related health problems. It is often used to assess weight status, because it is relatively easy to measure and correlates with body fat. After BMI is calculated for a child or adolescent, it is plotted by age on a gender-specific chart (see www.cdc.gov/growthcharts for the CDC's BMI-for-age growth charts for girls and boys aged 2–20y). Childhood obesity is increasingly being observed with changing lifestyles in families. The most important consequences of childhood obesity are its persistence into adulthood with all its health risks. Obesity among children is gradually becoming a major public health problem in India. The magnitude of overweight ranges from 9% to 27.5% and obesity from 1% to 12.9% among Indian children [6]. Different studies have shown varying prevalence of overweight and obesity [Table/Fig-6].

In our study thinness was more prevalent than overweight and obesity. However, percentage of children with overweight and obesity were higher in comparison to study by Vohra et al., [7] and Bharathi et al., [8]. Higher number of children fell into the category of overweight and obesity when Agarwal charts were used compared to CDC charts. Thinness was present in 40.8% males and 34.4% females on CDC Chart. This was in comparison with the Study by Anand K who reported thinness in 43.8% of boys and 30.1% girls [10]. Study by Prajapati et al., showed overweight to be more prevalent than undernutrition [6].

Elevated blood pressure in childhood may be early expression of essential hypertension in adulthood [11,12]. Hypertension has its origin in childhood but goes undetected unless specifically looked for during this period [13]. A variety of studies conducted in different parts of the world revealed a vast range in the prevalence of hypertension in children showing as high as 22% to as low as 0.6% [14]. In our study, overall prevalence of hypertension was 0.8% and pre hypertension was 1.9%.This was significantly less compared to study by Durrani A M on school children 12-16y in Aligarh where the overall prevalence of hypertension was 9.4% [15]. They recommend that children should be regularly screened so that remedial measures can be initiated as early as possible.

Skin disorders are among the most frequent ailments of schoolchildren in both developing and industrialized countries. The school environment makes children vulnerable to cross transmission of communicable skin diseases among themselves and their families [16]. Prevalence of skin disease was 4.8% of which T.Versicolor accounts for the majority (3.6%). Study on Saudi Arabia children by Wafa Y Al Saeed et al., revealed high incidence of skin disease (98.6%) and the most common disease noted was pigmentary disorders [17]. Study by Valia RA on Varanasi school children observed high prevalence of skin diseases (54%) and the commonest one noted was pediculosis capitis [18]. The reason for the high incidence was thought to be due to the low socioeconomic state of these children. The lower incidence of skin diseases in the present study is probably because of better hygienic practices.

School children are affected by various eye disorders like refractive errors, squint, Vitamin A deficiency and eye infections. Most children do not complain of defective vision, as they may not realise such conditions as a problem. This warrants early detection and treatment of these problems to prevent future blindness. Col A Dutta reported high prevalence of uncorrected errors of visual acuity among adolescent children [19]. Mukherjee et al., stated the importance of early detection and treatment of refractive errors to prevent permanent disability [20]. Myopia was the main type of undetected refractive error in our study(16.3%).This is much higher compared to the study by Padhye AS who reported myopia to be 3.16% in urban children and 1.45% in rural children [21]. Study by Anwar HN on Pakistani school children also reported low prevalence of myopia (4.38%) [22]. Study by Prasanna K on 1300 children in Karnataka reported Vitamin A deficiency as the commonest ocular morbidity (33.8%) and uncorrected refractive error as the second commonest morbid condition (5.6%) [23]. Madhu Gupta et al., at Shimla identified refractive error as the commonest morbidity among children (22%) in their study [24]. Prajapati et al., also had similar observation with a prevalence of 40.1% in their study at Gandhinagar [6]. Other ocular morbidities observed in our study were blepharitis in four children and ptosis in one child.

There are many problems that may affect a school-age child's teeth requiring dental care. The commonest dental problem noted in the study was caries teeth in 22.9% children followed by calculus in 15%. Dental caries is a major health problem with high prevalence globally involving people of all regions and society. Several prevalence studies have been conducted and reported on different occasions on the dental caries and the treatment needs in developing countries such as India. Study by Dhar V reported higher prevalence of caries (46.75%) among children in rural areas of Udaipur district [25]. In study by Batwala V on African children the prevalence of calculus was higher (25.9%) and was more common in males, government schools and among day scholars [26]. Other dental problems noted in our study were malocclusion (7.4%), cross bite, retained tooth and diastema tooth.

In the present study, weight, Height and BMI of these children were below the CDC centiles. Though thinness was more prevalent , overweight and obesity are also emerging nutritional problems that may be the consequence of emerging patterns of life style and diet in response to social and cultural changes. Majority were normotensive though small percentage had elevated readings highlighting the need of BP monitoring in school children. The present study has provided a clear indication of the magnitude of disorders of visual acuity among these children. Causes of higher prevalence should be identified .The awareness among school teachers should also be improved and they should play an active role in identifying the ocular problems and referring them for timely management. Oral hygiene was poor with high caries prevalence demonstrating a lack of established oral hygiene practices. A comprehensive community focussed oral health care intervention that includes oral health education and strengthening of school health programme is needed to improve the oral health status of children in Surathkal. The prevalence of skin disease was low.

Looking at the results of the study, it can be concluded that there is a need to implement intervention programmes effectively to improve the nutritional status of school age children of Surathkal region. School health screening should be started for regular health screening and health cards for each student should be maintained. It is advisable to start school based programmes where: