Adult asthma and traffic exposure at residential address, workplace address, and self-reported daily time outdoor in traffic: A two-stage case-control study

This study is part of the collection Scania Metadatabase for Epidemiology (SME)

Creator/Principal investigator(s):

Kristina Jakobsson - Lund University, Department of Laboratory Medicine, Lund, Division of Occupational and Environmental Medicine

Description:

This study used GIS (Geographical Information Systems) to estimate traffic exposure, not only on residential, but also on workplace address, in addition to survey questions on time spent in traffic during commuting or other daily activities. This study was conducted in two stages: A first cross-sectional public health survey in Southern Sweden 2004 (n = 24819, 18-80 years, response rate 59%) was followed by a case-control study in 2005 to obtain more detailed exposure and confounder information (n = 2856, asthmatics and controls (1:3, frequency matched on sex), 86% response rate). In the first survey, only residential address was known. In the second survey, questions about workplace addresses and daily time spent in traffic were also included. Residential and workplace addresses were geocoded and linked with GIS to road data and dispersion modelled outdoor concentrations of NOx (annual mean, 250 × 250 m resolution).

Creator/Principal investigator(s):

Kristina Jakobsson - Lund University, Department of Laboratory Medicine, Lund, Division of Occupational and Environmental Medicine

Identifiers:

SND-ID: EXT 0088

Purpose:

The aim was to investigate the association between traffic exposure and prevalence of asthma and asthma symptoms in adults in occupationally active age. The study investigated 1) separate associations with traffic at residence, workplace, and daily time in traffic, and 2) if combining the exposures, i.e. accounting for total exposure, would strengthen the association between traffic and asthma.

Description:

This study used GIS (Geographical Information Systems) to estimate traffic exposure, not only on residential, but also on workplace address, in addition to survey questions on time spent in traffic during commuting or other daily activities. This study was conducted in two stages: A first cross-sectional public health survey in Southern Sweden 2004 (n = 24819, 18-80 years, response rate 59%) was followed by a case-control study in 2005 to obtain more detailed exposure and confounder information (n = 2856, asthmatics and controls (1:3, frequency matched on sex), 86% response rate). In the first survey, only residential address was known. In the second survey, questions about workplace addresses and daily time spent in traffic were also included. Residential and workplace addresses were geocoded and linked with GIS to road data and dispersion modelled outdoor concentrations of NOx (annual mean, 250 × 250 m resolution).

Time period(s) investigated:

2005 — 2005

Geographic spread:

Geographic description: Scania (southern Sweden)

Unit of analysis:

Population:

Participants of the Scanian public-health survey 2004 having agreed to participate in additional studies, age 18-65 years, asthmatics and controls matched on sex.

Sampling procedure:

Probability: Stratified

Ethics Review:

Lund —387/2004

Contact person for questions about the data:

Kristina Jakobsson

Is part of collection at SND:

Scania Metadatabase for Epidemiology (SME)

Publications

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Anna Lindgren, Jonas Björk, Emilie Stroh, Kristina Jakobsson. Adult asthma and traffic exposure at residential address, workplace address, and self-reported daily time outdoor in traffic: A two-stage case-control study. BMC Public Health 2010, 10:716.
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Study on Environment and Health

Description:

The dataset includes a subset of the respondents (asthmatics and controls) from the Scanian public-health survey 2004 (Folkhälsoenkät Skåne 2004).

Data format / data structure:

Numeric

Geospatial

Data collection:

Mode of collection: Self-administered questionnaire: paper

Time period(s) for data collection: 2005 — 2005

Source of the data: Population group

Time period(s) investigated:

2005 — 2005

Number of individuals/objects:

2856

Response rate/participation rate:

86 %