The impact of survey nonresponse bias on conclusions drawn from a mammography intervention trial
| Autor: | Jonathan S. Slater, Melissa R. Partin, Annette Bar-Cohen, Mary Winnett, Lee S. Caplan, Michael E. Malone |
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| Rok vydání: | 2003 |
| Předmět: |
Adult
Epidemiology media_common.quotation_subject Psychological intervention Breast Neoplasms law.invention Treatment Refusal Randomized controlled trial law medicine Mammography Humans Non-response bias Poverty Selection Bias media_common Response rate (survey) Selection bias medicine.diagnostic_test business.industry Middle Aged Health Surveys Clinical trial Data Interpretation Statistical Survey data collection Female business Demography |
| Zdroj: | Journal of clinical epidemiology. 56(9) |
| ISSN: | 0895-4356 |
| Popis: | Background and objective This study demonstrates the impact of survey nonresponse bias on conclusions from a mammography trial targeting a disadvantaged population. Methods The trial randomized 1558 women to three interventions designed to promote repeat mammography: mailed reminder (minimum group); mailed thank-you card, patient newsletters, and reminder (maximum group); and no mailings (control group). The primary outcome, repeat mammogram within 15 months, was assessed from administrative and phone survey data. Results Administrative estimates revealed a statistically significant difference of 7% between the maximum and control groups on the primary outcome. Survey estimates (response rate 80%) revealed no significant differences. The differences by data source were traced to a survey nonresponse bias. There was a statistically significant difference of 16% between the maximum and control groups among survey nonrespondents for the primary outcome, but there were no differences among survey respondents. Conclusion The findings reiterate that even a low survey nonresponse rate can bias study conclusions and suggest studies targeting disadvantaged populations should avoid relying solely on survey data for outcome analyses. |
| Databáze: | OpenAIRE |
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