Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Personalization of Cover Letter and Response Rate - a Randomized Controlled Trial in the Danish Health and Morbidity Survey
Brief Summary: Several studies indicate that a survey that adapts personalized design features achieves higher participation rates. A feature can be a personalized cover letter which appears more relevant and interesting for the sample member. In the spirit of adaptive design, this study seeks to establish whether it can be advantageous for participation overall to use cover letters with targeted content and whether the effect on participation of different versions of the cover letter varies in sample subgroups in order to optimize design features in future surveys.


Options:
A: Arm Label: Low back pain patients; Type: N/A; Interventions: N/A
B: Arm Label: Standard cover letter; Type: NO_INTERVENTION; Interventions: N/A | Arm Label: Targeted cover letter 1; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 2; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 3; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 4; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 5; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 6; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 7; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 8; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 9; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Arm Label: Targeted cover letter 10; Type: EXPERIMENTAL; Interventions: Behavioral: Targeted cover letter | Intervention Type: BEHAVIORAL; Name: Targeted cover letter; Assigned to Arm(s): Targeted cover letter 1, Targeted cover letter 10, Targeted cover letter 2, Targeted cover letter 3, Targeted cover letter 4, Targeted cover letter 5, Targeted cover letter 6, Targeted cover letter 7, Targeted cover letter 8, Targeted cover letter 9
C: Arm Label: Standard mHealth Messaging; Type: ACTIVE_COMPARATOR; Interventions: Behavioral: Standard mHealth Messaging Group | Arm Label: mHealth Messaging Intervention; Type: EXPERIMENTAL; Interventions: Behavioral: mHealth Messaging Intervention Group | Intervention Type: BEHAVIORAL; Name: mHealth Messaging Intervention Group; Assigned to Arm(s): mHealth Messaging Intervention | Intervention Type: BEHAVIORAL; Name: Standard mHealth Messaging Group; Assigned to Arm(s): Standard mHealth Messaging
D: Arm Label: Paper PRO; Type: ACTIVE_COMPARATOR; Interventions: Other: Paper Survey | Arm Label: ePRO; Type: ACTIVE_COMPARATOR; Interventions: Other: Electronic Survey | Arm Label: Game-Motivated ePRO; Type: EXPERIMENTAL; Interventions: Other: The Guardians: A smartphone game | Intervention Type: OTHER; Name: The Guardians: A smartphone game; Assigned to Arm(s): Game-Motivated ePRO | Intervention Type: OTHER; Name: Paper Survey; Assigned to Arm(s): Paper PRO | Intervention Type: OTHER; Name: Electronic Survey; Assigned to Arm(s): ePRO

Answer: B