Longitudinal variability of time-location/activity patterns of population at different ages: a longitudinal study in California.

ABSTRACT:

Background

Longitudinal time-activity data are important for exposure modeling, since the extent to which short-term time-activity data represent long-term activity patterns is not well understood. This study was designed to evaluate longitudinal variations in human time-activity patterns.

Method

We report on 24-hour recall diaries and questionnaires collected via the internet from 151 parents of young children (mostly under age 55), and from 55 older adults of ages 55 and older, for both a weekday and a weekend day every three months over an 18-month period. Parents also provided data for their children. The self-administrated diary and questionnaire distinguished ~30 frequently visited microenvironments and ~20 activities which we selected to represent opportunities for ex

SUBMITTER: Wu X 

PROVIDER: S-EPMC3184256 | biostudies-literature | 2011 Sep

REPOSITORIES: biostudies-literature