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The prevalence and correlates of social phobia among undergraduate health science students in Gondar, Gondar Ethiopia

Abstract

Objective

Social phobia is highly prevalent among university students. The lowest and highest point prevalence of social phobia among undergraduate university students was estimated at 7.8% and 80%, respectively. However, research into social phobia and associated factors among undergraduate university students in low and middle-income countries has been limited. Therefore, this study aimed to assess social phobia and associated factors among university students in Ethiopia to contribute an attempt to ensure optimal care for students.

Result

A total of 503 participants were interviewed with a response rate of 100%. The mean age of the respondents was 22.17 (± 10) years. The prevalence of social phobia symptoms among students was found to be 31.2% with (95% CI 27.3 to 35.6%). In the multivariable analysis, poor social support (AOR = 2.8, 95% CI 1.40, 5.60), female sex (AOR = 2.3; 95% CI 1.50, 3.60), 1st-year students (AOR = 5.5; 95% CI 1.80, 17.20), and coming from a rural residence (AOR = 1.6; 95% CI 1.00, 2.40) were factors significantly associated with social phobia symptoms.

Introduction

Social phobia (SP) is the fear of social situations that involved interaction with others with its prevalence ranges from 3 to 13% in the general population [1]. Globally, the lifetime and current prevalence of social anxiety disorder was estimated at 4% and 1.3%, respectively [2]. Its onset started in late childhood and associated with new demands for social interaction, younger age, female sex, lower educational status, lower income, and performing in public [1, 3].

Social anxiety disorder was fearful in social gatherings, fear of public speaking, meeting new people, and avoidance of social situations [1,2,3]. Social fearful persons made bad images of their performance in social situations [4].

Social phobia was associated with problems within the siblings and the family [5]. The most common prevalence of social fear among the people was public speaking, and associated with female gender, low educational performance, psychiatric medication use, and absence of social support which led to low self-esteem, more distorted body image, and difficulty to interact with a social environment [4, 6,7,8].

Social phobia was a high prevalence among high school, college, and university students [9,10,11,12]. Two studies were done among undergraduate university students: the point prevalence of social phobia estimated at 7.8% and 80%, respectively [9, 13]. Different studies revealed that the major source of SP among university students was; exam, presentation, language, parental anger, criticism in front of others, exaggerated protection, maltreatment, and family provocation [12, 14]. Contributing factors for SP among students were a problem with the peers, roommates, feel that campus environment uncomfortable for study, racial diversity, and too many classmates were making study difficult [4].

Why students feared situations to diagnosis SP were giving talks in front of the audience and trying to make someone’s intimate romantic relationship [15, 16] and different studies reported risk factors of social phobia were; female sex, poor academic performances, psychoactive medication use, poor social support, freshmen, and spending more time thinking about face book [9, 17, 18].

The impact of social phobia among students decreased educational performance, dependence to take alcohol, avoid oral presentations, weak performance at clinical examinations, and develop depressive symptoms [13, 19].

Even though social anxiety disorder/social phobia has a high prevalence among university students globally including Ethiopia, little attention is given to its diagnosis and treatment. To the best of our knowledge, there has been no published study on social anxiety symptoms and associated factors among university students in Ethiopia. This study, therefore, aimed to investigate the prevalence and associated factors of social phobia symptoms among undergraduate students with a view to informing the development of interventions.

Main text

Methods

An institution based cross-sectional study was conducted at the University of Gondar from April to May 2018, Gondar Ethiopia.

Regular undergraduate students at the University of Gondar College of Medicine and Health Sciences were included in the sample and excluded critically ill students.

The sample size was determined by using the single population proportion formula involving the use of Epi-info version 7 with a 95% CI, a 4% margin of error, and a social phobia of 27.5% from previous study conducted among high school adolescents in Ethiopia [20]. Assuming a 5% non-response rate, 503 students were recruited randomly by using the simple random sampling technique. The total number of students in the college with their identification number taken from the UoG CMHS registrar office; then the required sample was selected through lottery method. The lists of dormitory students took from the UoG CMHS Student’s union dormitory affairs.

Data were collected using a pre-tested self-administered questionnaire, which contained socio-demographic factors, social support, clinical factors, and substance use factors. Social support was collected by the Oslo 3-item social support scale, which had a 3-item questionnaire commonly used to assess social support and used in several studies. The sum score scale ranges from 3 to 14, and had three broad categories: “Poor support” 3–8, “moderate support” 9–11, and “strong support” 12–14 [21]. Social phobia was measured by using 17 items social phobia inventory (SPI) scale with cut-off point’s ≥ 21. Its score ranges from 0 to 68, which was rated from 0 (not at all) to 4 (extremely) [22]. Social phobia inventory scale validated in different countries among adults and adolescents [23, 24].

Data were entered into Epi-info 7 software after checking for completeness and imported to SPSS version 21 for analysis. Univariate analysis was done to see the association of each independent variable with the outcome variable. Those variables a P-value less than 0.2 were entered into the multivariate logistic regression model to identify the effect of each independent variable with the outcome variables. The strength of the association evaluated by the adjusted odds ratio with a 95% CI, and less than 0.05 P-values were considered statistically significant.

Results

Socio-demographic characteristics

A total of 503 students was included in the study with a response rate of 100%. The mean age of the respondents was 22.17 (± 10) years. Out of the participants, 362 (72%) were male, 472 (93.8%) were single, 289 (57.5%) were coming from the rural residence, and over two-fifth (43.3%) were between the ages of 18 and 21 years. Among the respondents, 185 (36.8%) were 3rd-year students and their grade scored between a range of 2.75 and 3.5 (Table 1).

Table 1 Distribution of students by socio-demographic factors at UoG, CMHS, in 2018 (N = 503)

Clinical, social, and substance characteristics

A small number, 13 (2.6%) of the participants had history of mental illness, 84 (16.7%) had a chronic physical illness, and about 3.2% had family history of mental illness. Of the participants, almost two in five (43.3%) students had moderate social support and nearly two in five (41.4%) had poor social support. Regarding the current use of the substance: over two-thirds (43.7%) of the students were drinking alcohol and 56 (11.1%) were taking khat at the movement (Additional file 1).

Prevalence of social phobia

The 17-items of social phobia inventory were summed and the single variable was generated. The new variable ranges from 0 to 68 in absolute value. A total of 84 (16.7%) students had mild social phobia (scored about 21 to 30) and 47 (9.3%) of the students had a moderate social phobia (scored 31 to 40). A small number, 19 (3.8%) and 7 (1.39%) of the students had severe and very severe social phobia, respectively (Fig. 1). We further categorized social phobia into two levels (no social phobia and social phobia). This study showed that the prevalence of social phobia symptoms among participants was 31.2% with (95%, CI 27.3, 35.6%) (Additional file 2).

Fig. 1
figure 1

Bar chart showing that the distribution SPI score for students at the University of Gondar, Northwest Ethiopia in, 2018 (N = 503)

Factors associated with social phobia

Among all covariates, female sex, students studying in the 1st year, family history of mental illness, and poor social support had less than 0.2 a P-value in the univariate logistic regression and were considered as the multiple logistic regression models.

In the multivariable analysis suggested that the odds of social phobia, increased by 2.8 times (95% CI 1.40, 5.60) for students had poor social support compared to students had good social support. Female students were about 2.3 times (95%, CI 1.50, 3.60) more likely risk of social phobia compared to counterparts. Students studying in the 1st year were 5.5 times (95%, CI 1.80, 17.20) more likely to develop social phobia compared to counterparts. Similarly, the risk of social phobia for students whose residence from the rural areas increased by 1.6 times (95%, CI 1.00, 2.40) compared to students whose residence from the urban areas (Table 2).

Table 2 Factors associated with social phobia among students in the University of Gondar, Northwest Ethiopia in, 2018 (N = 503)

Discussion

In this study, the prevalence of social phobia and possible association with various factors was assessed. The results of the present study revealed that a remarkable proportion of students had social phobia. The prevalence of social phobia among students was found to be 31.2%.

Regarding prevalence, our result is consistent with those of other studies carried out in Ethiopia, Nigeria, India, and Australia the prevalence was estimated at 27.5%, 31.1%, 28.6%, and 30%, respectively [20, 25,26,27].

On the other hand, the current study finding was higher than those of other studies done in two areas of Saudi Arabia, Canada, Iran, and India, the prevalence was estimated at 14.1%, 16.3%, 7.9%, 17.2%, and 7.8%, respectively [5, 7, 9, 11, 28]. The variations might be the distinctions in sample sizes, measurement tools, rating scales, gender differences, and the socio-cultural contrast between Ethiopia and the other countries. In two areas of Saudi Arabia, the sample size was higher than in our study, while the measurement tool was the same [5, 28]. Besides the above differences, in two areas of Saudi Arabia took male and female students in their studies respectively [6, 27]. In Canada, Iran, and India, the diagnostic interview schedule III, Leibowitz questionnaires, and social interaction anxiety scale tools were used to assess the social phobia among university students, respectively.

However, our result was lower than those of other studies conducted in Saudi, India, Iran, two areas of Iraq and reported 60%, 46%, 78.9%, 58.5%, 80%, and 55.7%, respectively [12, 13, 19, 29, 30]. The discrepancy might be the sample size alterations and assessment tool differences. In Saudi, the study conducted among medical students and tested by using social phobia scale which differed from our assessment tool [19], in India, the study participants were only medical students but in our study all health science students included [30], in two areas of Iraq, college students and nursing students included in their studies respectively [13, 29].

Regarding associated factors, female sex was 2.3 times more likely at risk of increasing social phobia compared to male students. This study supported by those of other studies, females are not equally participated in all activities because of cultural influence when compared to male in Ethiopia [20], and in Iran, female students had highly prevalence of social anxiety disorder compared to male students [11]. The rate of specific phobias in women was double those of men [1]. The prevalence of social phobia near to double in female students compared to male students and the difference might be neglectful parenting styles and authoritarian difference between female and male students. Cultural and biological factors that may underlie sex differences in anxiety disorders [31, 32]. Social phobia has been faced comparatively high in female students compared to male students in our culture; males dominated and received special care from their parents. This is the major factors which affect the psychology of females and led to social anxiety symptoms and as a result, females have felt uncomfortable in social gatherings.

Poor social support was 2.8 times more likely to develop social phobia compared to good support this is comparable with the study done in Ethiopia [20], in Saudi Arabia, female students who had low income were exposed to social anxiety disorder [27], in India, medical students came from low socioeconomic class were a high risk of social phobia during their education [16], and school-age adolescents from urban residence had insufficient income families were more risk of social phobia [33].

Students studying in the 1st year were 5.5 times had social phobia compared to 5th-year students. This study was supported by other study was done in Indian medical college students compared to 2nd-year students but in our study the reference took from 5th-year students because most of the studies had low prevalent of social phobia in the last years of their study [17]. The 1st and 2nd-year students were highly risky for social phobia, the reason might be the University settings where they forced to live for away from their parents for the first time and expose for new environmental stressors including social situation [1, 34].

In Turkish, the 1st and 2nd-year university students had higher anxiety stress scores than other students [35]. Stress and environmental factors play a role in interpersonal stressors and thus can contribute to the development of social anxiety and differences in background, appearance, language, social and emotional development, all can affect whether or not a student fits in the university [36].

Finally, students coming from the rural areas were 1.6 times the risk of increasing social phobia compared to urban areas. Which was supported the studies done in India [14] and residence of students from the rural area in India medical college students developed social phobias which were consistency to our study [17]. Similar studies in Egypt, the prevalence of social phobia among male students were higher in urban areas but among female students were higher in rural areas [32] and the magnitude of social phobia was higher among rural areas’ students than urban and suburban students [37]. In Benin, the University of Parakou (UP) the impact of social phobia on academic performance among students living in rural areas were more risky to social phobia than those living in urban areas which means the prevalence of social phobia depends on the environment [34]. In Taiwan, rural adolescents were highly vulnerable to specific phobias compared to urban residences [38]. Another study conducted in India, risk factors of social anxiety in medical students were no significant difference between rural and urban residence [39]. The people living in rural areas were higher physical symptoms compared to those living in rural areas. The people belonging to urban areas had higher harm avoidance compared to those living in rural areas [36].

Conclusion and recommendations

In this study, the overall magnitude of social phobia was found to be 31.2%. Female sex, poor social support, students studying in the 1st year, and rural residence were explanatory variables significantly associated with social phobia. The ministry of education and the University of Gondar better to develop guidelines to solve the aforementioned factors. Further research on risk factors for social phobia should be conducted to strengthen and broaden these findings.

Limitations

A cross-sectional design cannot permit conclusions for some variables, for example, to decide whether social phobia symptoms are risks for or consequence. This finding is likely only to hint at the complex interactions between social phobia and explanatory variables (risk factors). The survey samples were a small number of students, the research work provided a summary of survey results. Another most important limitation of this study is the fact that the SPI scale was not validated in Ethiopia although it is widely used as a screening tool for social phobia in other countries. Further research should be considered on risk factors for social phobia to strengthen and broaden our results.

Availability of data and materials

No additional file is available for this study; all the data are included in the manuscript

Abbreviations

CBT:

cognitive behavioral therapy

CMHS:

College of Medicine and Health Science

DSM-V:

Diagnostic and Statistical Manual of Mental Disorders, 5th edition

NCS-R:

National Co-morbidity Survey Revised

PTSD:

post traumatic stress disorder

SPIN:

social phobia inventory scale

SPS:

social phobia scale

UoG:

University of Gondar

WHO:

World Health Organization

References

  1. Sadock BJ, Sadock VA, Ruiz P. Kaplan & Sadock’s synopsis of psychiatry behavioral sciences/clinical psychiatry. 11th ed. New York: Wolters Kluwer; 2015.

    Google Scholar 

  2. Stein DJ, Lim CCW, Roest AM, Jonge PD, Aguilar-Gaxiola S, Al-Hamzawi A, et al. The cross-national epidemiology of social anxiety disorder: data from the World Mental Health Survey Initiative. BMC Med. 2017;15:143.

    Article  PubMed  PubMed Central  Google Scholar 

  3. Dell’Osso L, Abelli M, Pini S, Carlini M, Carpita B, Macchi E, et al. Dimensional assessment of DSM-5 social anxiety symptoms among university students and its relationship with functional impairment. Neuropsychiatr Dis Treat. 2014;10:1325.

    PubMed  PubMed Central  Google Scholar 

  4. Vitasaria P, Wahabb MNA, Herawanc T, Sinnaduraib SK. Representation of social anxiety among engineering students. Procedia Soc Behav Sci. 2011;30:620–4.

    Article  Google Scholar 

  5. Al-Qahtani AM. Prevalence and risk factors of social phobia among secondary school male students in Khamis Mushayt, Kingdom of Saudi Arabia. Med J Cairo Univ. 2012;80(1):871–6.

    Google Scholar 

  6. Furmark T. Social phobia. In: Psychology UU, editor. Sweden; 2000.

  7. Izgiç F, Akyüz G, Doğan O, Kuğu N. Social phobia among university students and its relation to self-esteem and body image. Can J Psychiatry. 2004;49(9):630–4.

    Article  PubMed  Google Scholar 

  8. Furmark T, Tillfors M, Everz P-O, Marteinsdottir I, Gefvert O, Fredrikson M. Social phobia in the general population: prevalence and sociodemographic pro®le. Soc Psychiatry Epidemiol. 1999;34:416–24.

    Article  CAS  Google Scholar 

  9. Honnekeria BS, Goelb A, Umatec M, Shahd N, Sousad AD. Social anxiety and Internet socialization in Indian undergraduate students: an exploratory study. Asian J Psychiatry. 2017;27:115–20.

    Article  Google Scholar 

  10. Akram MS, Naik P, Nirgude AS. Study on social phobia and functional disability among University Students of Dakshina Kannada District. Natl J Community Med. 2016;7(12):909–13.

    Google Scholar 

  11. Asgari M, Amini K, Sahbaie F. Prevalence of social phobia disorder in high school students in Abhar city, Iran. J Fundam Ment Health. 2016;18(1):42–7.

    Google Scholar 

  12. AghaMohammadHasani P, Mokhtaree MR, Asadollahi Z, Fereidoni MJ, Student M. The prevalence of social phobia among students of Rafsanjan University of Medical Sciences, Iran, and its relation with personality traits in 2013. J Occup Health Epidemiol. 2016;5(2):72–82.

    Article  Google Scholar 

  13. Ahmad RJ, Bayan H, Faque T, Mardan Seidi PA. Prevalence of social anxiety in students of college of education—University of Garmian. Int J Arts Technol. 2017;8(3):79–83.

    Google Scholar 

  14. Alkhathamia S, Kaviania H, Shorta E. Social anxiety among adolescents and its relation to quality of life. Eur Proc Soc Behav Sci. 2014(2357-1330).

  15. Afifi DY. Social anxiety among Egyptian University Students. Cairo University; 2012.

  16. Ghazwani JY, Khalil SN, Ahmed RA. Social anxiety disorder in Saudi adolescent boys: prevalence, subtypes, and parenting style as a risk factor. J Fam Community Med. 2016;23:25–31.

    Article  Google Scholar 

  17. Ganapathi KC, Duraimurugan M, Kokila K, Gopal AM. A study on the prevalence of social anxiety disorder (SAD) among medical undergraduate students and its relation with self esteem. Community Med. 2016;3(4):31–5.

    Google Scholar 

  18. Ghezelbash S, Rahmani F, Peyrovi H, Inanloo M. Social anxiety in nursing students of Tehran Universities of Medical Sciences. Res Dev Med Educ. 2015;4(1):85–90.

    Article  Google Scholar 

  19. Alqarni AA, Zalaa MA, El-Hadad AA, Al-Ghamdi RS, Asiri SA, Al-Thabet MM, et al. Prevalence of social phobia among Saudi Medical Students. Med J Cairo Univ. 2017;85(2):657–61.

    Google Scholar 

  20. Mekuria K, Mulat H, Derajew H, Mekonen T, Fekadu W, Belete A, et al. High magnitude of social anxiety disorder in school adolescents. Psychiatry J. 2017;2017:5.

    Article  Google Scholar 

  21. Bøen H. Characteristics of senior centre users—and the impact of a group programme on social support and late-life depression. Norsk Epidemiol. 2012;22(2):261–9.

    Article  Google Scholar 

  22. Connor KM, Davidson JRT, Churchill LE, Sherwood A, Foa E, Wesler RH. Psychometric properties of the social phobia inventory (SPIN). Br J Psychiatry. 2000;176:379–86.

    Article  CAS  PubMed  Google Scholar 

  23. Caballo VE, Salazar IC, Irurtia MJA, Hofmann BGS. Measuring social anxiety in 11 countries: development and validation of the Social Anxiety Questionnaire for Adults. Eur J Psychol Assess. 2010;26(2):95–107.

    Article  Google Scholar 

  24. Garcia-Lopez LJ, Bermejo RM, Hidalgo MD. The social phobia inventory: screening and cross-cultural validation in Spanish adolescents. Span J Psychol. 2013;13(2):970–80.

    Article  Google Scholar 

  25. Emmanuel A, Oyedele EA, Gimba SM, Gaji LD, Terdi KD. Does self-esteem influence social phobia among undergraduate nursing students in Nigeria. Int J Med Health Res. 2015;1(1):28–33.

    Google Scholar 

  26. Sridhar V, Surya Rekha SV. Social anxiety: prevalence and gender correlates among young adult urban college students. Int J Indian Psychol. 2017;4(4):2349–3429.

    Google Scholar 

  27. Wilson I. Screening for social anxiety disorder in first year university students: a pilot study. Reprinted from Aust Fam Physician. 2005;34(11).

  28. Taha AA, El-shereef EA, Abdullah TIM, Abdullah RIM, Aldahasi WAM. Social anxiety disorder and its correlates among female students at Taif University, Saudi Arabia. Res Psychol Behav Sci. 2017;5(2):50–6.

    Article  Google Scholar 

  29. Ali SK, Kareem MS, Al-Banna DA. Assessment of social phobia among students of nursing college in Hawler Medical University at Erbil City-Iraq. Kufa J Nurs Sci. 2016;6(2):130–6.

    Google Scholar 

  30. Jogdande AJ, Gupta A. Social anxiety disorder in medical students: socio-demographic correlates. Int J Community Med Public Health. 2017;4(9):3293–6.

    Article  Google Scholar 

  31. Schry AR, Norberg MM, Maddox BB, White SW. Gender matters: the relationship between social anxiety and alcohol-related consequences. PLoS ONE. 2014;9(12):e115361.

    Article  PubMed  PubMed Central  Google Scholar 

  32. Abdallah ES, ELzeiny HH, Abdel-hady RF, El-Sheikh. Association between social phobia and parenting styles among secondary school students. Am J Nurs Sci. 2016;5(3):96–105.

    Article  Google Scholar 

  33. Chhabra V, Bhatia M, Gupta S, Kumar P, Srivastava S. Prevalence of social phobia in school-going adolescents in an urban area. Delhi Psychiatry J. 2009;12(1):18–25.

    Google Scholar 

  34. Djidonou A, Tchégnonsi FT, Adoukonou T, Ataïgba INE, Assa-Issa CN, Gandaho P. Associated factors and impacts of social phobia on academic performance among students from the University of Parakou (UP). Open J Psychiatry. 2016;6:151–7.

    Article  Google Scholar 

  35. Bayram N, Bilgel N. The prevalence and socio-demographic correlations of depression, anxiety and stress among a group of university students. Soc Psychiatry Psychiatr Epidemiol. 2008;43:667–72.

    Article  PubMed  Google Scholar 

  36. Yen FC. Normative data on anxiety symptoms on the Multidimensional Anxiety Scale for children in Taiwanese children and adolescents: differences, in the sex, age, and residence and comparison with an American sample. Child Psychiatry. 2010;41(6):614–23.

    Article  Google Scholar 

  37. Ragheb K, Abd El-Azem S, Abdel-wahab M, Attia H, Ismail R, Said M, et al. Prevalence of social anxiety symptoms among a sample of Egyptian adolescents. Egypt J Psychiatry. 2009;29(1):5–13.

    Google Scholar 

  38. Susan FS, Chong YM, et al. A 3-year panel study of mental disorders among adolescents in Taiwan. Am J Psychiatry. 2005;162:1344–50.

    Article  Google Scholar 

  39. Upadhyaya SK, Raval CM, Sharma DK, Charan J. Risk factors of social anxiety in medical college students. J Health Spec. 2016;4:207–11.

    Article  Google Scholar 

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Acknowledgements

The authors acknowledge the University of Gondar Department of Psychiatry for funding. The authors appreciate the study institution and the study participants for their cooperation in providing the necessary information.

Funding

The funding was funded by the University of Gondar and the funders only involved by giving the funding for the design of a study, data collection, analysis, and interpretation only.

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Contributions

GTD conceived the study and was involved in the study design, reviewed the article, analysis, report writing, and drafted the manuscript. WG and GT were involved in the study design, analysis, and drafted the manuscript. All authors read and approved the final manuscript.

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Correspondence to Getachew Tesfaw Desalegn.

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Ethics approval and consent to participate

Ethical approval was obtained from the Institutional Review Board (IRB) of the University of Gondar Department of Psychiatry. The objectives and demand of the study were explained carefully. To ensure confidentiality, participants’ data were linked to a code number and registered. All participants were given information sheets and were included in the study only after providing written consent. Confidentiality was maintained by using anonymous copes and who had a severe social phobia were considered for link a psychiatrist for further investigation and treatment.

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Additional files

Additional file 1.

Distribution of clinical, social, and substance characteristics of students at UoG, CMHS in, 2018 (n = 503).

Additional file 2.

Pie chart distribution of social phobia among students in the University of Gondar, Northwest Ethiopia in, 2018 (N = 503).

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Desalegn, G.T., Getinet, W. & Tadie, G. The prevalence and correlates of social phobia among undergraduate health science students in Gondar, Gondar Ethiopia. BMC Res Notes 12, 438 (2019). https://doi.org/10.1186/s13104-019-4482-y

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