Methodological considerations in a community-based longitudinal study.
OBJECTIVE
To describe methodological issues and strategies relevant to conducting a community-based longitudinal study.


METHODS
Study participants (N=1117 youth/parent pairs) residing in neighborhoods that were randomly selected using a multistage sampling procedure and 2000 census data. Data were collected annually using in-home, in-person, computer-assisted interviewing methods. Numerous retention methods were used to track and retain participants.


RESULTS
The initial response rate was 61%. The retention rate is 97%, and the valid interview completion rate is 93% after nearly 4 waves of data collection.


CONCLUSIONS
In order for community-based longitudinal studies to overcome barriers to enrollment and retention, particular attention must be given to appropriate planning and available resources.
Department of Health Promotion Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73190, USA. Roy-Oman@ouhsc.edu
Roy F
RF
Oman
Sara K
SK
Vesely
Cheryl B
CB
Aspy
Janene
J
Fluhr
LaDonna
L
Marshall
George
G
Calhoun
Sharon
S
Rodine
D000293:Adolescent; D000294:Adolescent Behavior; D000328:Adult; D019352:Censuses; D003628:Database Management Systems; D015340:Epidemiologic Research Design; D005191:Family Characteristics; D015438:Health Behavior; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D009825:Oklahoma; D010290:Parents; D018579:Patient Selection; D012111:Residence Characteristics; D012309:Risk-Taking; D012494:Sampling Studies