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.
Oman
Roy F
RF
Department of Health Promotion Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73190, USA. Roy-Oman@ouhsc.edu
Vesely
Sara K
SK
Aspy
Cheryl B
CB
Fluhr
Janene
J
Marshall
LaDonna
L
Calhoun
George
G
Rodine
Sharon
S
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