Effects of Telephone Versus Paper-and-Pencil Self-Administration of the Strengths and Difficulties Questionnaire (SDQ) in Child and Adolescent Outpatients: Evidence From Iran

Background: The strengths and difficulties questionnaire (SDQ) is one of the most common screening tools to detect children and adolescents who are at risk of mental health problems or have psychiatric disorders. The standard mode of SDQ completion is on paper; however, some studies used phone administration and argued that this is a feasible and valid method that can substitute in-person administration. However, few studies have investigated the validity and reliability of phone administration of the SDQ. Objectives: The current study aimed to compare the telephone versus paper-and-pencil administration of the SDQ among Iranian child and adolescent outpatients. Methods: Sixty six parents with children aged 3 to 15 years completed the SDQ questionnaire using paper-and-pencil and telephone interview techniques. The study was performed in 2016, and participants were from the city of Tehran (capital of Iran). Participants were first divided into two groups. Then, one of them first completed the questionnaire using the face-to-face interviews, and 3 to 4 days later, they again completed the questionnaire using the telephone interview. an‎d the vice versa occurred for the other group. The Pearson correlation analysis was used to calculate the correlation between the two methods in each group separately. Intra-class correlation (ICC) analysis was used to investigate the association between the two administration methods. Results: A significant positive correlation was found between the two types of administration in both groups (P < 0.05). Intra-class correlation coefficients indicated a good correlation between the scores obtained from each method of administration (all P values were < 0.001). Conclusions: Telephone administration of SDQ is a reliable method for collecting data when studying emotional and behavioral symptoms in children and adolescents attending outpatient psychiatric centers.