@article {1185, title = {Long-term retention of older adults in the Cardiovascular Health Study: implications for studies of the oldest old.}, journal = {J Am Geriatr Soc}, volume = {58}, year = {2010}, month = {2010 Apr}, pages = {696-701}, abstract = {

OBJECTIVES: To describe retention according to age and visit type (clinic, home, telephone) and to determine characteristics associated with visit types for a longitudinal epidemiological study in older adults.

DESIGN: Longitudinal cohort study.

SETTING: Four U.S. clinical sites.

PARTICIPANTS: Five thousand eight hundred eighty-eight Cardiovascular Health Study (CHS) participants aged 65 to 100 at 1989/90 or 1992/93 enrollment (58.6\% female; 15.7\% black). CHS participants were contacted every 6 months, with annual assessments through 1999 and in 2005/06 for the All Stars Study visit of the CHS cohort (aged 77-102; 66.5\% female; 16.6\% black).

MEASUREMENTS: All annual contacts through 1999 (n=43,772) and for the 2005/06 visit (n=1,942).

RESULTS: CHS had 43,772 total participant contacts from 1989 to 1999: 34,582 clinic visits (79.0\%), 2,238 refusals (5.1\%), 4,401 telephone visits (10.1\%), 1,811 home visits (4.1\%), and 740 other types (1.7\%). In 2005/06, the All Stars participants of the CHS cohort had 36.6\% clinic, 22.3\% home, and 41.1\% telephone visits. Compared with participants aged 65 to 69, odds ratios of not attending a CHS clinic visit were 1.82 (95\% confidence interval (CI)=1.54-2.13), 2.94 (95\% CI=2.45-3.57), 4.55 (95\% CI=3.70-5.56), and 9.09 (95\% CI=7.69-11.11) for those aged 70 to 74, 75 to 79, 80 to 84, and 85 and older, respectively, in sex-adjusted regression. In multivariable regression, participants with a 2005/06 clinic visit were younger, more likely to be male and in good health, and had had better cognitive and physical function 7 years earlier than participants with other visit types. Participants with home, telephone, and missing visits were similar on characteristics measured 7 years earlier.

CONCLUSION: Offering home, telephone, and proxy visits are essential to optimizing follow-up of aging cohorts. Home visits increased in-person retention from 36.5\% to 58.8\% and diversified the cohort with respect to age, health, and physical functioning.

}, keywords = {Age Factors, Aged, Aged, 80 and over, Ambulatory Care Facilities, Analysis of Variance, Cardiovascular Diseases, Chi-Square Distribution, Epidemiologic Studies, Female, Geriatric Assessment, House Calls, Humans, Logistic Models, Longitudinal Studies, Male, Multivariate Analysis, Patient Dropouts, Patient Selection, Research Subjects, Telephone, United States}, issn = {1532-5415}, doi = {10.1111/j.1532-5415.2010.02770.x}, author = {Strotmeyer, Elsa S and Arnold, Alice M and Boudreau, Robert M and Ives, Diane G and Cushman, Mary and Robbins, John A and Harris, Tamara B and Newman, Anne B} }