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The Cornella Health Interview Survey Follow-Up (CHIS.FU) Study: design, methods, and response rate

Author(s): Garcia Montse | Schiaffino Anna | Fernandez Esteve | Marti Merce | Salto Esteve | Perez Gloria | Peris Merce | Borrell Carme | Nieto F Javier | Borras Josep Maria

Journal: BMC Public Health
ISSN 1471-2458

Volume: 3;
Issue: 1;
Start page: 12;
Date: 2003;
Original page

Keywords: record linkage | cohort study | risk factors | smoking | alcohol | cancer | cardiovascular diseases | methods

Abstract Background The aim of this report is to describe the main characteristics of the design, including response rates, of the Cornella Health Interview Survey Follow-up Study. Methods The original cohort consisted of 2,500 subjects (1,263 women and 1,237 men) interviewed as part of the 1994 Cornella Health Interview Study. A record linkage to update the address and vital status of the cohort members was carried out using, first a deterministic method, and secondly a probabilistic one, based on each subject's first name and surnames. Subsequently, we attempted to locate the cohort members to conduct the phone follow-up interviews. A pilot study was carried out to test the overall feasibility and to modify some procedures before the field work began. Results After record linkage, 2,468 (98.7%) subjects were successfully traced. Of these, 91 (3.6%) were deceased, 259 (10.3%) had moved to other towns, and 50 (2.0%) had neither renewed their last municipal census documents nor declared having moved. After using different strategies to track and to retain cohort members, we traced 92% of the CHIS participants. From them, 1,605 subjects answered the follow-up questionnaire. Conclusion The computerized record linkage maximized the success of the follow-up that was carried out 7 years after the baseline interview. The pilot study was useful to increase the efficiency in tracing and interviewing the respondents.

Tango Jona
Tangokurs Rapperswil-Jona

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