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International Journal of Emergency Mental Health and Human Resilience - Evaluation of social anxiety and health anxiety in health workers in the Covid 19 pandemic period in selected hospitals of Shahid Beheshti University in Tehran in 2021
ISSN: 1522-4821

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  • Research Article   
  • Int J Emer Ment Health, Vol 26(1)

Evaluation of social anxiety and health anxiety in health workers in the Covid 19 pandemic period in selected hospitals of Shahid Beheshti University in Tehran in 2021

Shahrzad Taghipour*
Department of Psychology, Christ University, Iran
*Corresponding Author: Shahrzad Taghipour, Department of Psychology, Christ University, Iran, Email: shahrzadtaghipoor@gmail.com

Received: 25-Dec-2023 / Manuscript No. ijemhhr-24-122981 / Editor assigned: 28-Dec-2023 / PreQC No. ijemhhr-24-122981 / Reviewed: 11-Jan-2024 / QC No. ijemhhr-24-122981 / Revised: 16-Jan-2024 / Manuscript No. ijemhhr-24-122981 / Accepted Date: 25-Dec-2023 / Published Date: 22-Jan-2024 QI No. / ijemhhr-24-122981

Abstract

Background: Social anxiety and health anxiety are characterized by persistent and severe health concerns. People with anxiety have misconceptions and misinterpretations of health and are also hypersensitive to their physical symptoms. It is associated with disability and high costs for the medical community.

Keywords: Health Anxiety, Social Anxiety, Health workers, Covid 19.

Keywords

Health Anxiety, Social Anxiety, Health workers, Covid 19.

Introduction

Covid-19 has persisted as a serious issue posing a threat to public health since the report of the first case of the infection. The initial reports predicted the spread of the virus much larger than one (from 2.24 to 3.58) . However, the number of people infected with Covid-19, and also the numbers of deaths caused by the virus have been rapidly increasing across the world such that it led to an emergency situation over a few months threatening people’s health throughout the world (Abbasi Asl R, 2016). Not only this issue has raised concerns about public health, but also it has created psychological symptoms including phobia, depression, and anxiety in different social classes (Abdi H, 2018). These types of anxiety are dangerous and damaging to health like the spread of dangerous infectious diseases is called health anxiety .Health anxiety is a disorder diagnosed by excessive anxiety and phobia about a serious disease. Therefore, this disorder may persist if it is not cured, and it can impose considerable costs on healthcare, quality of life, and work capability (Abramowitz JS,2008). On the other hand, anxiety is also considered one of the symptoms of Covid-19. Thus, under the stressful and agitating conditions caused by the spread of Covid-19, people may accuse themselves of being infected with this virus without being really infected with the virus (Asmundson GJ, 2020).This state of mind may lead to a vicious cycle of increasing anxiety symptoms such that the beliefs held by the people with health anxiety change into a threat to their health under the influence of internal and external stimuli (Baptista CA, 2012).By focusing on pathogenesis and human physiology, more potential treatments can be identified (Bazrafshan MR, 2021). Thus, this study aimed at examining social anxiety and health anxiety in health care workers during the prevalence of the Covid-19 pandemic Tehran, Iran (Bella TT, 2009).

Method

This research was a descriptive study, and the population consisted of the workers (nurses, paramedics, and paramedic assistants) of the selected hospitals (Modaress,Taleghani,Shohada -e -Tajrish,Imam Hossein,Masih Daneshvari) of Shahid Beheshti University in Teheran, Iran, working at some wards with Covid-19 patients in 2021. The sample size was measured as 124. The inclusion criteria were: Working in Covid-19 wards and having at least one year of work experience (Eilenberg T, 2016).

The required information was collected using three questionnaires (demographic characteristics, Liebowitz Social Anxiety Scale (LSAS), and Health Anxiety Inventory (Ganji T, 2010). The demographic characteristics included age, gender, job, employment status, marital status, type of work shift, number of children, education, being infected with Covid-19, having family members with Covid-19, underlying diseases, overtime, the ward where they work, work experience, experience of working in Covid-19 wards, average working hours per week, satisfaction with personal equipment, quarantine conditions, and personal protection (Ghadimi Karahroodi S,2020). The social anxiety scale was developed in and it includes situations where situations are related to social interactions and situations are related to performance anxiety in front of others. Individuals should determine the severity of anxiety and avoidance from a certain situation based on the four-option Likert scale graded from zero to three according to what happened to them over the last week (Ghezelbash S,2015). The maximum performance anxiety score was and the maximum anxiety score about social situations was the maximum general score was considering the sum of these two subscales, the severity of social anxiety of individual can be measured (Hadisi N, 2022).

The scores of performance avoidance and avoidance of social situations dimensions were obtained by summing up the scores provided in the avoidance column, and the scores of performance anxiety and fear of social situations were obtained by summing up the scores in the anxiety or phobia column including Mild social anxiety (55-65); moderate social anxiety (65-80); severe social anxiety (80-95); very severe social anxiety (higher than 95) (Hosseini Ghomi, T J,2014). In the study conducted by the validity of LSSASSR retest and its subscales were in the range of r=0.76-0.84 and their internal consistency (Cronbach’s alpha) were in the range 0.73-0.93. The convergent validity of LSAS-SR was at an acceptable level in relation to other anxiety scales (r=0.46-0.94) . In this study, the reliability of Liebowitz Social Anxiety Scale (LSAS) scale was obtained through internal consistency using Cronbach’s alpha yielding 0.892 (Irani M, 2020).

The Health Anxiety Inventory was developed by to evaluate health anxiety (Karimi J,2019). This scale includes 18 items and three components including general concerns about one’s health, illness-related concerns, and consequences of an illness. Each item consists of a group of four statements from A to D that are scored from one to four respectively (Lai J,2020). The higher scores indicate more severe illness and symptoms. The scores range from 0 to 54. The scores above 18 indicate suffering from anxiety and the ones above 37 indicate health anxiety disorder reported that this scale has good validity and reliability for diagnosing health anxiety (Liu Q, 2020). The reliability was obtained as 0.89 using Cronbach’s alpha (Lopez-Solà C,2018). The convergent validity of this test was appropriate according to the Yale–Brown Obsessive Compulsive Scale (Y-BOCS) and Depression Anxiety Stress Scale (DASS) indicating the appropriate validity of health anxiety showed that this scale enjoyed an appropriate validity and reliability in the Iranian sample (Mattila E,2021). In this study, the reliability of the health anxiety scale was measured through internal consistency using Cronbach’s alpha yielding 0.921 (Mazhari S, 2014).

Statistical Analysis: The statistical analysis was performed using the Statistical Package for the Social Sciences software (version 22, SPSS Inc., Chicago, IL). Data were analyzed using the normality Kolmogorov–Smirnov test (Mirzabeigi AR, 2021). The obtained information was analyzed using the indices of descriptive statistics (frequency, percentage, mean, standard deviation) and inferential statistics (Cronbach’s alpha test, normality, correlation coefficient).

Results

The findings relate to the 124 healthcare workers. The descriptive information on healthcare workers has been presented in (Table 1).

   Demographic characteristics   Frequency Percentage
Age Less than 30 32 25.8
31-40 67 54
41-50 25 20.2
Gender Female 71 57.3
Male 53 42.7
Job Nurse 88 71
Paramedic  21 16.9
Paramedic assistant 15 12.1
Employment status Project-based 24 19.4
Contractual 28 22.6
Temporary 26 21
Permanent 22 17.7
Corporate 24 19.4
Marital status Single 42 33.9
Married 78 62.9
Widow 3 0.8
Others 1 0.8
Type of work shift Fixed morning shift 26 21
Fixed evening shift 20 16.1
Fixed night shift 44 35.5
Rotating shifts 34 27.4
Number of children Childless 52 41.9
One child 27 21.8
Two children 31 25
Three children 14 11.3
Infected with Covid-19 Yes 38 30.6
No 86 69.4
Having family members with Covid-19 Yes 63 50.8
No 61 49.2
Underlying diseases Yes 8 6.5
No 116 93.5
Overtime Less than 28 hours 35 28.2
29-35 hours 40 32.3
More than 36 hours 49 39.5
Workplace section Severe respiratory center 23 18.5
Emergency 31 25
Internist center 28 22.6
Infections 28 22.6
ICU 14 11.3
Work experience 1-5 years 33 26.6
6-10 years 46 37.1
  More than 10 years    
45 36.3
Work experience in Covid-19 ward Less than 15 months 22 17.7
16-18 months 74 59.7
More than 19 months 28 22.6
Average working hours per week Less than 36 hours 37 29.8
37-72 hours 47 37.9
More than 72 hours 40 32.3
Satisfaction with personal equipment Low 36 29
Average 36 29
High 42 33.9
Very high 10 8.1
Quarantine status and personal protection Low 36 29
Average 28 22.6
High 30 24.2
Very high 30 24.2

Table 1.Demographic characteristics of healthcare workers.

According to the results, 10 participants (8.1%) suffered from social anxiety, 30 participants (24.2%) suffered from severe social anxiety, and 84 participants (67.7%) suffered from very severe social anxiety (Table 2).

Levels of social anxiety Number Percentage of frequency
Mild social anxiety (55-65) 0 0
Moderate social anxiety (66-80) 10 8.1
Severe social anxiety (81-95) 30 24.2
Very severe social anxiety (96 and above) 84 67.7

Table 2. Distribution social anxiety scores of healthcare workers

The lowest social anxiety score was 66, and the highest score was 126. The mean and standard deviation of the social anxiety variable were 99, and 11.70 respectively. This indicated that the sample suffered from highly severe social anxiety. Considering the coefficient of skewness, the distribution of social anxiety is left-skewed, the coefficient of kurtosis shows that the above distribution is normal because the skewness and kurtosis are in the interval (-2, 2). Furthermore, the lowest and highest scores on the performance anxiety subscale were 34 and 72 with the mean and standard deviation of 53.37±8.63. The lowest and highest fears of social situation scores were 26 and 66, with the mean and standard deviation of 45.63±7.45 (Table 3).

Variable Social anxiety Performance anxiety Fear of social situations Anxiety   Avoidance
Number 124 124 124 124 124
Mean 99 53.37 45.63 47.68 51.32
Standard deviation 11.7 8.63 7.45 7.87 8.05
Variance 136.94 74.56 55.5 62.01 64.84
Coefficient of skewness -0.14 -0.03 -0.2 -0.06 0.19
Coefficient of kurtosis 0.12 -0.26 -0.05 0.29 0.35
Minimum 66 34 26 26 30
Maximum 126 72 66 68 74

Table 3. Descriptive statistics of social anxiety variable and its dimensions in healthcare workers

According to the results, 81 participants (65.3%) suffered from anxiety, 43 participants (34.7%) suffered from health anxiety disorder (the lowest score was 29, and the highest was 44) (Table 4).

Health anxiety levels Number Percentage of frequency
Low anxiety (less than 18) 0 0
Suffering from anxiety (18-36) 81 65.3
Health anxiety disorder (higher than 37) 43 34.7

Table 4. Distribution of health anxiety in healthcare workers

The lowest health anxiety score was 29 and the highest score was 44. The mean and standard deviation of the health anxiety variable were 36.06 and 3.60 respectively. This indicates that the sample suffers from a health anxiety disorder. Additionally, the lowest and highest scores on general concerns about one’s health subscale were nine and 21 respectively with the mean and standard deviation of 13.99±2.33. The lowest and highest scores on the illnessrelated concerns subscale were seven and 16 respectively with the mean and standard deviation of 12.07±1.99. The lowest and highest scores on consequences of an illness subscale were five and 15 respectively with the mean and standard deviation of 9.99±1.88 (Table 5).

Variable Health anxiety General concerns about one’s health Illness-related concerns Consequences of an illness
Number 124 124 124 124
Mean 36/06 13.99 12.07 9.99
Standard deviation Mar-60 2.33 1.99 1.88
Variance 12.96 5.42 3.97 3.54
Coefficient of skewness 0.15 0.22 0.12 0.06
Coefficient of kurtosis -0.63 -0.19 -0.67 -0.12
Minimum 29 9 7 5
Maximum 44 21 16 15

Table 5. Descriptive statistics of health anxiety variable and its dimensions in healthcare workers

Discussion

The findings showed that most participants in the study (67.7%) suffered from very severe social anxiety and the lowest number of participants (8.1) suffered from moderate social anxiety. Of course, no study was found that directly assessed the anxiety of healthcare workers; however, there were some studies conducted on students that are mentioned in the following lines showed that the level of social anxiety in students was 52% that is less than the anxiety level detected in the current study . One possible explanation is that the study was conducted on students while the current study was conducted on healthcare workers during the spread of Covid-19. showed the level of social phobia in students studying at Kerman University of Medical Sciences as 40.6% . In the study by Bella et al. conducted in Nigeria, the social phobia in all students was reported as 8.5% . Showed that 11.6% of the students in Brazil suffered social anxiety . A possible explanation for the difference between social phobia in different societies is the difference in the cultures, religions, numerous diagnostic tools different methods of interviewing, and information collection. Showed that the level of social phobia in nursing and midwifery students was 28.6%. The frequency of mild, moderate, severe, and very severe social phobia was 19%, 7.3%, 0.9%, 0.9% respectively. The results of the study by with most participants being female, married, holding a bachelor’s degree with a mean age of 33 years, showed that 53 participants (42.8%) suffered from mild stress, and 34 participants (27.4%) suffered from severe anxiety. The comparison between the levels of anxiety based on the demographic variables of participants showed that the level of anxiety had no significant relationship with gender, marital status, education, and major of study.

Concerning social anxiety and its dimensions in healthcare workers, the lowest social anxiety score was 66, and the highest score was 126. The mean and standard deviation of the social anxiety variable were 99 and 11.70 respectively. This result indicated that the sample suffered from very severe social anxiety. Furthermore, the lowest score was 34 and the highest score was 72 on the performance anxiety subscale with the mean and standard deviation of 53.37±8.63, and the same scores were 26 and 66 respectively on the fear of social situations subscale with the mean and standard deviation of 45.63±7.45. This is the case such that the healthcare workers obtained the highest score on the performance anxiety subscale. The level of social anxiety in workers of Bushehr University of Medical Sciences was shown as 21.11±9.08 (21) which was consistent with the results of the current study.

Estimated the mean social anxiety as 0.43 in their study conducted to predict the students’ social anxiety. The results of the study by. Showed that the mean scores of social anxiety in students with and without experience of workstudy had a statistically significant difference. As for the social anxiety in groups of healthcare workers, the results indicated that the scores of intragroup social anxiety for the participants who were under 30 years old, bachelor and working as paramedic assistants, temporary employees, and workers in an emergency department and fixed night shifts were higher than others. In addition, the scores of intragroup social anxiety for the participants who were aged 41-50 and bachelor and working as paramedic assistants, permanent employees, and workers in Acute Respiratory Clinic (ARC) and in fixed morning shifts were lower than others. The study by on nursing students showed that there is no statistically significant difference between anxiety and the marital status of students. It appears that the level of anxiety is different between bachelor and married students due to the positive effects of marriage on mental health; however, the study by did not confirm such an assumption.

Moreover, the distribution frequency and levels of health anxiety in healthcare workers indicated that 81 participants (65.3%) suffered from anxiety and 43 participants (34.7%) suffered from a health anxiety disorder such that the lowest health anxiety score was 29, and the highest was . evaluated the health anxiety mean score of healthcare workers as 12.67±8.53 . measured the health anxiety mean score of nurses as 38.40 . Thus, Abdi et al. reported that the health anxiety mean score of nurses working at the hospital was 30.08, and it was 44.45 for the ICU workers. Therefore, to explain the results of the study we may state that the nurses as the people who are at the center of this happening experience some degrees of anxiety facing Covid-19 that may stem from being at the center of the event which imposes unavoidable anxiety on them.

Furthermore, in terms of the dimensions of health anxiety in healthcare workers, the results indicated that the lowest and highest scores were nine and 21 on general concerns about one’s health subscale with the mean and standard deviation of 13.99±2.33; the lowest and highest scores were 7 and 16 respectively on illness-related concerns subscale with the mean and standard deviation of 12.07±1.99; the lowest and highest scores were five and 15 respectively on consequences of an illness subscale with the mean and standard deviation of 9.99±1.88. This is the case such that healthcare workers on the general concerns about one’s health scale obtained the highest score and those on consequences of an illness subscale obtained the lowest score.

In the epidemic of viral diseases such as Covid-19, people with high health anxiety consider any changed physical symptom as a sign of contracting a viral disease and thus increase their level of health anxiety and worry . An excessive increase in health anxiety in these people weakens the body’s immune system against the corresponding viral disease and can even affect people’s rational decisions and social behaviors. Contrary to the mentioned materials and the results of some researches, the increase in the level of health anxiety in some cases cause people to be inattention to the critical situation of the society, which itself can increase the probability of infection with viral disease and transmission to others. Based on this, maintaining a moderation in the level of health anxiety can play an important role in preventing and fighting the epidemic of viral diseases such as Covid-19 in controlling the disease and fighting it by the people of the society.

Considering the results of the study Mattila et al the phobia caused by the infection is the independent factor in the prediction of anxiety. The studies by Liu showed that the phobia of being infected with Covid-19 causes anxiety. The results of the study by Ghadimi Karahroodi & Sepehriyanazar showed the components of the disease the consequences of the disease and general health concerns are significant evaluated the dimensions of health anxiety in nurses working in healthcare centers in Tehran and showed that they experienced greater negative feelings than ordinary people. Nonetheless, no significant difference was found between them in terms of positive feelings . The results of the study by Mohammadfam et al. showed that the risk of being infected with Covid-19 in people working at a hospital was measured as 50 to 100. It is necessary to consider appropriate training programs to reduce nurses’ anxiety so that nurses can provide better services to patients. It is suggested to compare the health anxiety and social anxiety of health workers with ordinary people.

Conclusion

This study showed that most participants suffered from severe social anxiety and the lowest number of participants suffered from moderate social anxiety. Furthermore, the samples showed some degrees of health anxiety such that the healthcare workers showed the highest score on general concerns about one’s health subscale, and the lowest score on consequences of an illness scale. Therefore, concerning the fact that the nurses face stressful factors at the workplace that could impact their general health status, the nurses’ managers can have an effective role in managing nurses’ well-being to provide better care to the patients by training the nurses, providing periodical counseling to the nurses, and taking some measures like changing the wards where the nurses work. Therefore, in order to improve nurses, nursing managers can provide training to nurses in this field and periodic consultations for nurses and creating measures such as changing the department will be able to play an effective role in managing the well-being of nurses in providing patient care.

References

Abbasi Asl, R., Naderi, H., Akbari, A (2016). Predicting the level of social anxiety of female students based on personality traits. J Prin of Men Hea.18 (6): 343-9.

Indexed at, Google Scholar, Cross Ref

Abdi, H., Eissazadegan, A., Michaeli Manee, F (2018). Comparison of health anxiety, sensory processing sensitivity and harm avoidance among nurses of critical and public care unit.7(7):189-206.

Indexed at, Google Scholar

Abramowitz, JS., Braddock, A (2008). Psychological treatment of health anxiety and hypochondriasis: A biopsychosocial approach.

Google Scholar

Asmundson, GJ., Taylor, S (2020). Coronaphobia: Fear and the 2019-nCoV outbreak. J Anxiety Disord .70:102196.

Indexed at, Google Scholar, Cross Ref

Baptista, CA., Loureiro, SR., de Lima Osório, F (2012).Social phobia in Brazilian university students:  prevalence, under-recognition and academic impairment in women. J Affect Disord .136(3):857–61.

Indexed at, Google Scholar, Cross Ref

Bazrafshan, MR., Delam, H., Elahi, M., Akbarpoor, S., Faramarzian, Z (2021). Factors Influencing Anxiety of Healthcare Workers during the Outbreak of 2019 Novel Coronavirus Disease (COVID-19): A Cross-Sectional Study. J Health Sci Surveillance Sys .9(1):26-31.

Indexed at, Google Scholar, Cross Ref

Bella, TT., Omigbodun, OO (2009). Social phobia in Nigerian university students: prevalence, correlates and  comorbidity. Soc Psychiatry Psychiatr Epidemiol.44 (6): 458-46.

Indexed at, Google Scholar, Cross Ref

Eilenberg, T., Fink, P., Jensen, J.S., Rief ,W., Frostholm, L (2016). Acceptance and commitment group therapy (ACT-G) for health anxiety: a randomized controlled trial.

Indexed at, Google Scholar, Cross Ref

Ganji, T., Hoseyni, AF (2010). Spirituality and anxiety in nursing students of faculty of Nursing and  Midwifery Iran University of Medical Science. Iran J Nurs.23(64):44-51.

Indexed at, Google Scholar

Ghadimi  Karahroodi, S., Sepehrian Azar, F (2020). Comparison of Health Anxiety, Sleep Guality and Guality of Life in People  With and Without Chronic Pain. J Anesth Pain.10(4):63-76.

Indexed at, Google Scholar

Ghezelbash, S., Peyrovi, H., Inanloo, M., Haghani, H (2015). Relationship between Social Anxiety and Some Demographic  Characteristics among Nursing Students. J Healt. 17(1): 19-29.

Indexed at, Google Scholar

Hadisi, N., Abedi, H., Shokoohi, M., Tasdemir, S., Mamikhani, S., Meshgi, S (2022). COVID-19 and Endocrine System: A Cross-Sectional Study on 60 Patients with Endocrine Abnormality. Cell J. 24(4):182-187.

Indexed at, Google Scholar, Cross Ref

Hosseini Ghomi, T.,Salimi Bajestani, H., Zakeri, N (2014). Relationship Religious Orientation and Hope with Health Anxiety among Women Nurses in Imam Khomeini Hospital of Tehran. Ira J Nur Res. 9(1):17-24.

Indexed at, Google Scholar

Irani, M (2020). Review on the Symptoms, Transmission, Therapeutics Options and Control the Spread of the Disease of COVID-19.2020;9(2): 171-180.

Indexed at, Google Scholar, Cross Ref

Karimi, J., Homayouni, A., Homayouni, F (2019). The Prediction of Health Anxiety based on Experiential Avoidance and Anxiety Sensitivity among non-clinical Population. J Ment Health.12 (4): 66-79.

Indexed at, Google Scholar

Lai, J., Wang, Y., Cai, Z (2020). Factors Associated with Mental Health Outcomes Among Health Care Workers Exposed to Coronavirus Disease 2019. 3(3): e203976-e.

Indexed at, Google Scholar, Cross Ref

Liu, Q., Luo, D., Haase, JE., Guo, Q., Wang, XQ (2020).The experiences of health-care providers during the COVID-19 crisis in China: a qualitative study. Lancet Glob Hea.8(6):790–798.

Indexed at, Google Scholar, Cross Ref

Lopez-Solà, C., Bui, M., Hopper, JL., Fontenelle, LF (2018). Predictors and consequences of health anxiety symptoms: a novel twin modeling study. Acta Psychiatr Scand.137(3):241-251.

Indexed at, Google Scholar, Cross Ref

Mattila, E., Peltokoski, J (2021). COVID-19: anxiety among hospital staff and associated factors. Ann Med. 53(1): 237-246.

Indexed at, Google Scholar, Cross Ref

Mazhari, S., Ekhlaspour, M., Banazadeh, N (2014). Social phobia and its association with academic  performance among students of Kerman University of Medical Sciences, Iran.11 (2):227-235.

Indexed at, Google Scholar

Mirzabeigi, AR., Agha Mohammad Hasani, P., Sayadi, AR (2021). Assessing Health Anxiety among Healthcare Providers of COVID-19 Patients from March to May 2020, Rafsanjan County, Iran.10 (1) :24-30.

Indexed at, Google Scholar, Cross Ref

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