Background: Access to mental health care is limited. Internet-based interventions (IBIs) may help bridge that gap by improving access especially for those who are unable to receive expert care. Aim: This review explores current research on the effectiveness of IBIs for depression and anxiety. Results: For depression, therapist-guided cognitive behavioral therapy (CBT) had larger effect sizes consistently across studies, ranging from 0.6 to 1.9; while stand-alone CBT (without therapist guidance) had a more modest effect size of 0.3–0.7. Even other interventions for depression (non-CBT/non-randomized controlled trial (RCT)) showed modestly high effect sizes (0.2–1.7). For anxiety disorders, studies showed robust effect sizes for therapist-assisted interventions with effect sizes of 0.7–1.7 (efficacy similar to face-to-face CBT) and stand-alone CBT studies also showed large effect sizes (0.6–1.7). Non-CBT/Non-RCT studies (only 3) also showed significant reduction in anxiety scores at the end of the interventions. Conclusion: IBIs for anxiety and depression appear to be effective in reducing symptomatology for both depression and anxiety, which were enhanced by the guidance of a therapist. Further research is needed to identify various predictive factors and the extent to which stand-alone Internet therapies may be effective in the future as well as effects for different patient populations.

Objectives To estimate lifetime prevalence of mental disorders in the Saudi National Mental Health Survey (SNMHS). Methods The SNMHS is a face‐to‐face community epidemiological survey in a nationally representative household sample of citizens ages 15–65 in the Kingdom of Saudi Arabia (KSA) (n = 4,004). The World Health Organization (WHO) Composite International Diagnostic Interview (CIDI) was used to estimate lifetime prevalence of common DSM‐IV mental disorders. Results Estimated lifetime prevalence of any DSM‐IV/CIDI disorder is 34.2% and lifetime morbid risk is 38.0%. Anxiety disorders are by far the most prevalent (23.2%) followed by disruptive behavior (11.2%), mood (9.3%), eating (6.1%), and substance use (4.0%) disorders. Synthetic estimates of cohort effects suggest that prevalence of many disorders has increased in recent cohorts. Onsets typically occur in childhood for a number of anxiety and disruptive behavior disorders and in adolescence or early adulthood for most other disorders, although age‐of‐onset distributions for drug abuse is much later (median age of 31) than in CIDI surveys carried out in other high‐income countries. Conclusions Lifetime mental disorders are highly prevalent in Saudi Arabia and typically have early ages‐of‐onset.

Objectives To estimate 12‐month prevalence and severity of mental disorders in the Saudi National Mental Health Survey (SNMHS). Methods The SNMHS is a face‐to‐face community epidemiological survey in a nationally representative household sample of citizens aged 15 to 65 in the Kingdom of Saudi Arabia (KSA) (n = 4,004). The World Health Organization (WHO) Composite International Diagnostic Interview (CIDI) was used to estimate 12‐month prevalence of common DSM‐IV mental disorders. Results Twelve‐month prevalence of any DSM‐IV/CIDI disorder is 20.2%. Most common are anxiety disorders (12.3%) followed by mood (6.8%), disruptive behavior (5.4%), eating (3.2%), and substance use (1.9%) disorders. The proportion of 12‐month cases rated serious (39.0% of all cases) is high across virtually all disorders relative to the proportions found in CIDI surveys in other high‐income countries. Younger people have significantly elevated odds of mood and disruptive behavior disorders and serious disorders. Women have significantly elevated odds of anxiety and mood disorders and serious disorders. Previously married people have significantly elevated odds of most disorder classes and serious disorders. Conclusions Both 12‐month prevalence and severity of DSM‐IV/CIDI disorders are high in Saudi Arabia compared to other high‐income countries that carried out comparable surveys.