Table 1 Description of Studies Included in Review
From: A systematic review of the effect of retention methods in population-based cohort studies
First Author (Publication Date), Study Name, Reference Number | Baseline Sample Population | Year Started | Baseline Sample Size | Interval Between Data Collections | Evaluation Year(s) | Data Collection Method | Retention Method (s) | Response Ratesa,b |
|---|---|---|---|---|---|---|---|---|
Randomised Studies of Retention Strategies | ||||||||
Doody (2003) US Radiologic Technologists (USRT) Study, [22] | Adults | 1984-1987* | 132 454 2700 1 | 8-10 Years | 1995-1997 | Postal | RCT of monetary incentives | 72% 23% RCT |
Kalsbeek (1995) 1993-1994 Self-Care Assessment of Community Based Elderly, [23] | Adults 67+ | 1991 | 3485 | 2 Years | 1993-1994 | Telephone | RCT of advance packets with non-monetary incentives | 78% |
Koo (1996) The Canadian Study of Diet, Life-Style and Health, [24] | Girls aged 5-13 | 1992 | 657 | 1 Year | 1995 | Postal | RCT of reminder letters | 74% 55% RCT |
Laurie (2007) British Household Panel Survey (BHPS), [25, 26] | Households | 1991* | 10 264 | 1 Year | 2004 | Face-to-Face | RCT of monetary incentives | 85% |
Olson (2008) National Longitudinal Survey of Youth in 1979 (NLS79), [27–30] | Youth and young adults aged 14-22 | 1979* | 12 686 | 1-2 Years | 2000 | Mixed | RCT of monetary incentives | 83% 32% RCT |
Olson (2008) National Longitudinal | Women aged 20-44 | 1967 | 5159 | 1-2 Years | 2001 | Mixed | RCT of monetary and non-monetary incentives | 46% |
Women aged 14-24 | 1968 | 5083 766 1 | 9 Years | Â | Â | Â | 54% 30% RCT | |
Olson (2008) National Longitudinal Survey of Youth in 1997 (NLS97), [27–30] | Youth aged 12-17 | 1997* | 8984 3,8251 | 1 Year | 2006 | Face-to-Face | RCT of monetary incentives | 84% 65% RCT |
Rimm (1990) Health Professionals Follow-up Study, [31] | Males aged 40-75 | 1986* | 51 672 | 1-2 Years | 1988 | Postal | RCT of mailing methods | 93% 69% RCT |
Rodgers (unpublished) Health and Retirement Study (HRS), [32] | Adults aged 60+ | 1992* | 12 654 | 2 Years | 2000 | Telephone | RCT of monetary incentives | 88% |
White (2005) VITamins And Lifestyle (VITAL) Study, [33] | Adults aged 50-76 | 2000* | 77 700 452 1 | 2 Years | 2002 | Postal | RCT of non-monetary incentive | 84% 34% RCT |
Non-Randomised Studies of Retention Strategies | ||||||||
Boys (2003), [34] | Youth aged 15-16 | 2000 | 540 | 1 Year | 2001-2002 | Postal | Reminder methods and alternative methods of data collection | 92% |
Calle (2002) Cancer Prevention Study II (CPS-II) Nutrition Cohort, [35] | Adults aged 50-74 | 1992* | 184 194 | 2 Years | 2003 | Postal | Repeated questionnaire postings and alternative methods of data collection | 90% |
Clarke (1998) Whitehall I Study, [36] | Males aged 40-69 | 1967 | 19 019 | 25 Years | 1995 | Postal | Repeated questionnaire postings and reminder methods | 73% |
Eagan (2002), [37] | Adults aged 15-70 | 1985 | 3370 | 11 Years | 1996-1997 | Postal | Reminder methods | 89% |
Garcia (2005) Cornella Health Interview Survey Follow-up (CHIS.FU) Study, [38] | All ages | 1994 | 2500 | 8 Years | 2002 | Telephone | Multiple telephone calls and alternative methods of data collection | 68% |
Harding (2007) The DASH (Determinants of Adolescent Social well-being and Health) Study, [39] | Youth aged 11-13 | 2003* | 6643 | 2 Years | 2005 | Face-to-Face | Multiple school visits | 72% |
Hoffman (1998) CLUE II Study, [40] | Adults aged 18+ | 1989* | 28411 2000 2 812 3 | 6 Years | 1995 | Postal | RCT of questionnaire length, non-RCT of non-monetary incentives, non-RCT of re-posting of questionnaire and reminder postcard | 72% 34% Pilot 1 46% Pilot 2 16% Pilot 3 |
Lissner (2003) Population Study of Women in Gothenburg, Sweden, [41] | Females aged 38-60 | 1968* | 1462 | 6-8 Years | 2000-2002 | Face-to-Face | Alternative methods of data collection | 72% |
Michaud (2005) NIH-AARP Diet and Health Study, [42] | Adults aged 50-69 | 1995* | 567 169 | 10 Years | 2002 | Postal | Multiple postings of questionnaire and alternative methods of data collection | 76% |
Mills (2000), [43] | Youth aged 11-12 | 1992 | 1614 | 1 Year | 1995-1997 | Face-to-Face | Alternative methods of data collection | 91% |
Novo (1999), [44] | Youth aged 16 | 1981* | 1083 | 5 Years | 1986 | Face-to-Face | Alternative methods of data collection | 98% |
Rudy (1994), [45] | Women aged 20-35 | 1993 | 221 | 1 Month | 1993 | Postal | Non-RCT of monetary and non-monetary incentives | 72% |
Russell (2001) Black Women's Health Study (BWHS), [46] | Women aged 21-69 | 1995* | 64 500 | 2 Years | 1997 | Postal | Multiple postings of questionnaire, reminder methods and alternative | 83% |
Tolusso (2003) National Population Health Survey (NPHS), [47] | All ages | 1994* | 17 276 | 2 Years | 2003 | Telephone | Multiple telephone calls and alternative methods of data collection | 81% |
Ullmann (1998) UCLA Study of Adolescent Growth, [48] | Youth aged 12-16 | 1976* | 1634 | 1 Year | 1992 | Postal | Reminder methods, multiple postings of questionnaire and monetary incentive | 68% |
Walker (2000) British Regional Heart Study (BRHS), [49] | Males aged 40-59 | 1978* | 7735 | 2-9 Years | 1983-1985 | Postal | Reminder methods | 88% |
Women's Health Australia Research Group (2001) Women's Health Australia (WHA) Study, [50–53] | Women aged 18-23 Women aged 45-50 Women aged 70-75 | 1996* | 14 247 13 716 12 432 | 2 Years | 1998-2000 | Postal | Reminder methods and alternative methods of data collection | 71% 92% 89% |