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OBJECTIVE: This study tested the impact on response and psychological measures of different follow-up schedules for participants in a study screening for type 2 diabetes risk. STUDY DESIGN AND SETTING: Participants were randomly allocated either to limited follow-up (n=213), with a single questionnaire at 1 year, or to intensive follow-up (n=218), with questionnaires sent 1, 6, and 12 months after screening. RESULTS: There were no statistically significant differences between the groups at 1 year in either response rate (P=.08) or change from baseline to 1-year follow-up in scores on the short form of the Spielberger State Anxiety Inventory (SSAI-SF; P=.13), although there was a statistically significant but small difference between the groups in the change score of the 12-item Well-Being Questionnaire (WBQ-12; P=.003). The proportion of participants completing a WBQ-12 measure at 1 year was significantly greater in the intensive follow-up group (P=.03). CONCLUSION: This study shows no important adverse effect of repeated questionnaire use on response rates or psychological outcomes and suggests that some measures may be more fully completed with intensive follow-up.

Original publication

DOI

10.1016/j.jclinepi.2005.02.016

Type

Journal

J Clin Epidemiol

Publication Date

10/2005

Volume

58

Pages

991 - 996

Keywords

Adult, Aged, Anxiety, Diabetes Mellitus, Type 2, Female, Follow-Up Studies, Health Status Indicators, Humans, Long-Term Care, Male, Mass Screening, Middle Aged, Outcome Assessment (Health Care), Patient Compliance, Psychiatric Status Rating Scales, Research Design, Surveys and Questionnaires