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Table 3 Data Collection for Intermediate Measures and Covariates

From: Tablet-Aided BehavioraL intervention EffecT on Self-management skills (TABLETS) for Diabetes

Measure Data collected Method
Process and behavioral measures Information Measured by the 29-item CVD Knowledge Questionnaire [61]
  Motivation Measured by the brief Intrinsic Motivation Inventory (IMI) [62]
  Behavioral skills Assessed with the 13-item Cardiac Self-Efficacy scale [63]
  Self-efficacy Measured by 10-item General Self-Efficacy scale [64]
  Empowerment Measured by 28-item Diabetes Empowerment Scale-Short Form (DES-SF) [65, 66]
  Tablet usability Measured by the modified System Usability Scale (SUS) [67]
Covariates Demographics Previously validated items from the 2002 National Health Interview Survey are used to capture age, gender, race/ethnicity, marital status, household income, and health insurance
  Medical comorbidity Medical comorbidity is documented using previously validated items on chronic health conditions from the Behavioral Risk Factor Surveillance System (BRFSS, 2010) [68]
  Social support The Medical Outcomes Study (MOS) Social Support Survey [69] is used to measure social support
  Health literacy The short form of the Test of Functional Health Literacy in Adults (s-TOFHLA) [70] is designed to rapidly screen patients for potential health literacy problems. The 3-item Chew Health Literacy Screening Survey will also be used [71]
  Depression The PHQ-9 is a brief questionnaire that scores each of the 9 DSM-IV criteria for depression [72]