The Prevalence of Illness Anxiety Disorder Among Adults in Taif City, Saudi Arabia: A Cross-Sectional Study.

Introduction Illness Anxiety Disorder (IAD), characterized by intense fear of serious illness, has been associated with performance issues at work, frequent absences, financial burdens from medical expenses, impaired daily functioning, and the onset and recurrence of coronary heart disease. This study aimed to assess the prevalence of IAD and explore its cardiac manifestations in residents of Taif City, Saudi Arabia. Methods A descriptive cross-sectional study was conducted among adults in Taif City, excluding those with psychiatric illnesses. Participants completed an online self-administered questionnaire, including sociodemographic information and the validated Short Version Health Anxiety Inventory (SHAI) scale. Results Among 415 participants, predominantly females (60%), the study found a 25.3% prevalence of IAD. Of those with IAD, 3% were diagnosed with cardiac diseases, and 27% were hospitalized due to cardiac symptoms. Twenty-five percent exhibited normal examination results after hospitalization. Factors such as female gender (p=0.006), younger age (p=0.006), single marital status (p=0.012), and a history of hospitalization due to heart symptoms (p=0.003) were associated with higher IAD scores. Married participants had a lower risk of IAD compared to singles (OR: -2.2, 95% CI: -3.9, -0.48), while a history of hospitalization due to heart symptoms increased the risk of IAD (OR: 2.8, 95% CI: 0.94, 4.7). Conclusion This study revealed a substantial prevalence of IAD in Taif City. Female gender, younger age, being single, and having a history of hospitalization due to heart symptoms were identified as determinants of IAD. Healthcare providers must recognize these disorders to prevent unnecessary investigations and treatments, redirecting patients to psychiatry for more cost-effective and beneficial interventions.