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The prevalence of disorders causing disability in young adult males in Turkey between 2009-2011.

Objective: Disability is one of the significant problems that the public faces as regards social aspects, economics, public health and politics. Our aim was to review the prevalence of diseases causing disabilities in young adult men who are declared “unfit for military service” in Turkey after medical examination. Methods: We reviewed the prevalence of diseases among 113,175 young adult men who were referred for medical examination between 2009 and 2011. Results: Prevalence of unfitness for military service was 5.56% in 2009, 6.74% in 2010 and 6.77% in 2011. Leading causes for young adult men to be rejected from military service was intellectual disability 6.88, hearing loss 3.71, epilepsy 1.59, schizophrenia 1.54 and diabetes mellitus 1.47 per thousand people. Conclusion: Screening for the prevalence of disability conditions is an important data source for policies to be developed. Supporting such survey with community based studies in different populations in future shall be beneficial for improvement of policies in social and health fields.


INTRODUCTION
Disability is one of the most important issues affecting the society in terms of social, economic, public health, and politics today. 1 The International Classification of Functioning, Disability and Health defines disability as an umbrella term for impairments, activity limitations and participation restrictions. Disability is the interaction between individuals with a health condition and personal and environmental factors. 2 It has been estimated that more than one billion people or 15% of the world population in, 2010 experienced some forms of disability in accordance with World Health Organization (WHO) criteria. 3 Prevalence of disability has varied from country to country due to the differences in the criteria for assessing the disability all around the world. For instance, it has been found that 18.1% of men and 17.3% of women of all ages in Australia, 10.0% in the USA between 18 and 64 years, 3.8% in Ethiopia are classified as disabled or needs assistance for performing regular daily tasks. [4][5][6] The number of handicapped people has increased worldwide. It has been estimated that 66.5% of the people with disability suffer from chronic diseases each year in low and middle-income countries. 7 In some countries, trends such as environmental factors and traffic accidents, natural disasters, conflicts, diet and substance abuse have resulted in increased disability rates by influencing health conditions. 3 It is compulsory for a man to perform their military service in Turkey. 8 Every person is primarily examined in Recruiting Offices where two physicians are available in accordance with Health Ability Regulation (HAR) of Turkish Armed Forces (TAF) before they start their military service. During these health examinations, disabilities that will prevent these people from performing their military service are analyzed. Proceedings for cases such as loss of extremity, blindness etc. are made in Recruiting Offices, whereas cases requiring advanced examination such as intellectual disability, hearing loss, schizophrenia and epilepsy are performed in Military Hospitals. Health reports belonging to the men not suitable for Military service are collected in Health Department Directorate of National Defense Ministry (NDM). This data provides lot of useful information regarding diseases which cause impairments in the young adult male population of Turkey.
The objective of this study was to review the prevalence of diseases causing disabilities in young adult men from 2009 to 2011.

Research Group:
The number of people that applied for the first health examination for the compulsory military service between 2009 and 2011 was 1.777.500 from which 6.367% was rejected due to disabilities and disorders. We reviewed the health reports of 113.175 men who were declared "unfit for the military service" after examination for military service in Turkish Armed Forces (TAF) "Training Hospitals" are tertiary military hospitals such as GMMF Ankara and Haydarpasa Istanbul, whereas "regional hospitals" are military hospitals with 600 beds, and other military hospitals are classified as "secondary stage military hospitals." Recruiting Office consists of at least two doctors and the administrative staff. These offices transfer the men to military hospitals if a patient has a disease observed through external physical examination or is too weak to go to the hospital. Evaluating the data and statistical analysis: The cities recruiting offices are grouped in accordance with the quinary zoning system prepared by Turkish Statistical Institute. 9 Cities are classified as West, South, Middle, North and East in accordance with this zoning system. Participants' ages are classified as "19, 20, 21-24 and over 25" as the people are taken into health examination between 19 and 20 ages. The data collected is entered into computers via SPSS 15.0 statistics program and then analyzed. Frequency and percentage are used for discrete data as descriptive statistics and mean±standard deviation are used for continuous variables.

RESULTS
In this study, health reports belonging to 113.175 young adult men, who were declared "unfit for military service" between 2009 and 2011, were reviewed. It showed prevalence of unfitness for military service was 5.56% in 2009, 6.74% in 2010 and 6.77% in 2011.
We also found out that the most common age group was the 19 year-old with a health deficiency proportion of (28.7%), the most common region in means of recruiting office was the Eastern Anatolia Region at (28.9%) and the hospital group at which maximum examinations are conducted is secondary military hospitals at (45.7%) ( Table-I).
In this study the subject's ineligibility for military service was divided into three classifications: disability, non-disability and unclassified conditions. The most common conditions that cause disability in young adult males in Turkey was intellectual disability, hearing loss, epilepsy, schizophrenia and diabetes mellitus with a prevalence of 6.88, 3.71, 1.59, 1.54 and 1.47 per thousand people respectively. The top three non-disability conditions observed in this study were obesity, refraction disorders and lack of weight (Table-II). The change in prevalence that causes the circumstances of disability between 2009-2011 is given in Fig.1.

DISCUSSION
In this study the prevalence of unfitness for military service was found to be 5.56% in 2009, 6.74% in 2010 and 6.77% in 2011. In the study by Kocoglu in Turkey, it has been reported that the unfitness for military service rate was 4.25%, 5.35% and 4.46 % in people born in 1945, 1950 and 1955, respectively. 10 Study by Kilic, on 21.985 young adult males showed the rate of unfitness for military service was 4.57%. 11 In our study the prevalence of incapable young adult males is found to be higher than other stud-Necmettin Kocak et al.  ies conducted in Turkey. These results suggest that rates of unfitness for military service have increased in akin with the increase in the prevalence of obesity in public. In a survey conducted by Taanila et al on 1411 young adult males who were about to be accepted into their military service in Finland, it was observed that 9.4% of the participants were rejected due to their impairments. 12 Prevalence of intellectual disability is 1% worldwide and it is observed in men more frequently than in women. 13 In our survey, intellectual disability was found to be 6.37 per thousand in 2009, 7.17 per thousand in 2010 and 7.08 per thousand in 2011. Furthermore, the prevalence in other surveys conducted in Saudi Arabia 14 and the USA 15 is similar to ours. However, in survey conducted in Pakistan 16 higher rates of impairments have been detected.
The second most common cause of disability in the world has been reported as hearing loss. 17 The same results were obtained in our study. In this study, hearing loss after (40dB or more) has become an impairment and sequelae over the years; the pervasiveness of hearing loss per thousand for the year 2009 was 3.32, 3.95 per thousand for the year 2010 and 3.86 per thousand for the year 2011 have been observed. Kilic's study showed a moderate and severe hearing loss of 1.7 per thousand and severe hearing loss and deafness was found to be 0.56 per thousand. 11 According to the American Community Survey, in 2010, for men aged between 16 and 20 in the United States, deafness and hearing loss was at 0.7%, and 2.8% for men aged between 21 and 64. 5 Epilepsy is a chronic non-communicable disorder of the brain that affects people of all ages. The estimated proportion of the general population with active epilepsy is between 4 to 10 per 1000 people. However, some studies in developing countries suggest that the proportion is between 6 to 10 per 1000. Around 50 million people worldwide have epilepsy. 18 In our survey, the prevalence of epilepsy was found at 1.53 per thousand in 2009, 1.67 per thousand in 2010 and 1.57 per thousand in 2011. Ebrahimi et al carried out a survey in Iran and observed an epilepsy rate of 7.87 per thousand. 19 An analysis by the Centers for Disease Control and Prevention (CDC) in 2010, suggested a epilepsy rate of ten per thousand in the United States. 20 Schizophrenia is a severe form of mental illness affecting about 7 per thousand of the adult population, mostly in the age group of 15-35 years. Although the incidence is low (3 per 10,000), the prevalence is high due to chronicity. 21 In our survey, prevalence of schizophrenia was found to be 1.59 per thousand in 2009, 1.74 per thousand in 2010 and 1.28 per thousand in 2011. In Italy, Tansella et al reported its prevalence to be 1.3 for males and 1.1 for females per thousand. 22 In England, Freeman and Alpert found rates per thousand to be 7.0 in males and 6.6 in females. 23 Developments in technology, sedentary lifestyle and obesity diabetes mellitus has increased worldwide. In the year 2000 there was an estimated of 151 million people with diabetes in the world, which is likely to double by the year 2025 reaching about 300 million. 24,25 In our study, prevalence of diabetes mellitus was found to be 1.41 per thousand in 2009, 1.50 per thousand in 2010 and 1.49 per thousand in 2011. In Kilic's study, the diabetes mellitus prevalence was 0.5 per thousand people. 11 This increase in obesity in society, especially in the recent years is thought to be responsible for the increased prevalence of diabetes.
There are a few factors that have led to the observation of lower rates of schizophrenia, epilepsy and diabetes mellitus in our study. Most importantly, 64% of the age group being observed was between the ages of 19-20, furthermore, military service is considered to be an honour by patients and their families and diseases are commonly kept a secret. Evaluating numerous people for all diseases in a very short time period is also considered to be beneficial leading to proper diagnosis of diseases.
The diagnoses of the cases are transferred to the computer by using the codes in HAR which was a restriction of this survey. Diseases in HAR have been classified functionally. Due to functional classification especially in some disease groups, disease rates resulting in disability could not be calculated. Our survey has been conducted by reviewing health reports of 113,175 people who have been rejected from military service. The large survey population of this study can be deemed a strength of this study. We also observed prevalence of disability conditions among young adult men and its change between 2009 and 2011.

CONCLUSION
This study showed that, prevalence of unfitness for military service in Turkey was 5.56% in 2009, 6.74% in 2010 and 6.77% in 2011. It shows a slight gradual increase every year. It also showed that the levels of hearing loss in Turkey was similar to other countries, intellectual disability in Turkey similar to the prevalence in other countries, and Turkey has lower rates of schizophrenia, epilepsy and diabetes The Prevalence of Disorders Causing to Disability mellitus. Detecting the prevalence of disability conditions is a significant data source which can be used by policy makers to improve health & social services besides conducting further community based studies.