Descriptive statistics tables from a detailed analysis of the National Human Activity Pattern Survey (NHAPS) data
Level 4 - case-series / case-control
Cross-sectional descriptive survey analysis (graded by design analogy)
What was done
Analyzed unweighted data from the 1992–1994 National Human Activity Pattern Survey (NHAPS) comprising 9,386 randomly selected individuals. Participants completed 24-hour minute-by-minute activity diaries and follow-up questions regarding potential exposure to household pollutants. Descriptive statistics and frequency distributions were generated for time spent and frequency across 39 specific locations, 22 activities, 10 regrouped locations (e.g., indoor residence, vehicle, office/factory), 7 regrouped activities, and smoker-present status across 12 demographic and health subgroups (e.g., age, gender, education, census region, asthma, angina, bronchitis/emphysema).
What was found
The abstract presents no specific numerical findings, averages, or summary statistics regarding time allocation or exposure levels. It reports only the structure and availability of descriptive tables and frequency distributions generated for the 9,386 participants.
Why it matters
Serves as a fundamental baseline reference cataloging human time-use and activity patterns for exposure assessment and environmental health risk modeling in the United States.
Limits
The analysis is explicitly unweighted, which may limit generalizability to the broader US population. Data rely on self-reported or proxy-reported 24-hour recall diaries and questionnaires, which are susceptible to reporting and recall bias. The abstract omits all specific numerical results.
Cited by
- context Americans spend between 93% and 96% of their lives indoors.