Cool Kids Online with different types of therapist guidance for treating anxiety disorders in clinically anxious children.

INTERVENTION: Condition 1 (Cool Kids Online with Scheduled Therapist Support): 8 interactive online lessons released weekly with 4 x brief therapist phone contact to assist with program implementation and troubleshoot barriers (approximately 30 minutes and fortnightly) and automated emails (when new lessons are available and at various points throughout treatment that are clinically meaningful). Condition 2 (Cool Kids Online with Optional Therapist Support): 8 interactive online lessons released weekly with the option for brief therapist phone contact to assist with program implementation and troubleshoot barriers (from the outset, or at any point during the 10 week treatment phase) and automated emails (when new lessons are available and at various points throughout treatment that are clinically meaningful). Condition 3 (Cool Kids Online self‐guided): 8 interactive online lessons released weekly with automated emails (when new lessons are available and at various points throughout treatment that are clinically meaningful). Condition 4 (Waitlist Control): 10 week wait (no trial intervention provided). Cool Kids Online is a skills based, cognitive‐behavioural treatment (CBT) program delivered over the internet. The CBT lessons include psychoeducation about anxiety and skills to manage anxiety. Skills focus on thinking styles and behavioural responses to anxiety. Lessons are completed by both parent (coach) and child together. In addition, each lesson has extra information especially for parents. This extra information teaches parents helpful strategies to respond to anxiety and assist their child to implement the Cool Kids online skills. Cool Kids Online material is presented using animated video and audio material, case examples and practice activities/inform CONDITION: Anxiety; ; Anxiety Mental Health ‐ Anxiety PRIMARY OUTCOME: % of participants with remission of primary anxiety diagnosis via the ADIS‐IV C/P amended for DSM‐5. Remission is defined as having a clinical severity rating of 3 or lower on the ADIS Clinical Severity Rating scale.[Post‐Baseline (11 weeks after baseline) and 6 months post‐treatment.] SECONDARY OUTCOME: % of participants with remission of any anxiety diagnosis via the ADIS‐IV C/P amended for DSM‐5. Remission is defined as having a clinical severity rating of 3 or lower on the ADIS Clinical Severity Rating scale.[Post‐Baseline (11 weeks after baseline) and 6 months following ; [Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on parent‐report Short Mood and Feeling Questionnaire (Angold et al 1995)[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on parent‐report Spence Children's Anxiety Scale (Spence, 1998)[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Parent report of resource use for mental health difficulties based on parent report of resource use through a study‐specific questionnaire[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] INCLUSION CRITERIA: ‐ Child aged 7 ‐ 12 years ‐ Child has a primary anxiety diagnosis or primary diagnosis of obsessive compulsive disorder (according to DSM‐5) ‐ Regular access to a computer and internet within the family home ‐ Both parent and child are Australian residents ‐ Primary caregivers are proficient in reading and writing in English ; treatment] Change in Clinician Severity Ratings of primary anxiety disorder[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on child report Child Anxiety Life Interference Scale (CALIS, Lyneham et al 2013) [Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on child report Child Health Utility ‐ D9 (CHU‐D9; Stevens, 2010)[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on child report Short Mood and Feelings Questionnaire (Angold et al 1995) [Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on child‐report Spence Children's Anxiety Scale (Spence, 1998) [Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on parent‐report Child Anxiety Life Interference Scale (CALIS; Lyneham et al 2013[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on parent‐report Child Health Utility‐D9 (CHU‐D9; Stevens, 2010)[Post‐Baseline (11 weeks post baseline) and 6 months post‐treatment] Change on parent‐report Conduct‐Hyperactive‐Attention Problem‐Oppositional Symptom Questionnaire (CHAOS; Levy, Kronenberg & Dunn, 2017)