The research question is "Are the different types of house in Ho Chi Minh city equally contributing to chronic respiratory diseases?". According to this question, a cross-sectional and explorative study was set up to explore the differences in the environmental characteristics and prevalence of chronic respiratory diseases among common housing types in Ho Chi Minh city. Preliminary work was performed in 100 houses (20 houses per type, included tube houses, rental houses, rural houses, slum and apartment) from November 2013 to June 2015. It included measures by environmental devices, questionnaires and indoor activities diaries. This study will aim to collect information about the prevalence of chronic respiratory diseases (CRDs) inside those house types to understand more about role of house types in developing CRDs. The objective is: 1. to evaluate the relationships between the type of house and lung function of inhabitants in each housing type. 2. to evaluate the effects of environmental risk factors in each house type on prevalence of CRDs
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
SCREENING
Masking
NONE
Enrollment
1,500
Basic lung function test performed with a micro-spirometer, without broncho dilatator
Pham Ngoc Thach University of medicine
Ho Chi Minh City, Vietnam
FEV1/FVC
Basic lung function test, without broncho dilatation (micro-spirometer). All lung function related outcomes are performed during the same test. FEV1: forced expiratory volume in one second. FVC: Forced vital capacity.
Time frame: 5 minutes
FVC
Basic lung function test, without broncho dilatation (micro-spirometer). All lung function related outcomes are performed during the same test.FVC: Forced vital capacity.
Time frame: 5 minutes
VC
Basic lung function test, without broncho dilatation (micro-spirometer). All lung function related outcomes performed during the same test. VC: Vital capacity
Time frame: 5 minutes
FEF 25-75%
Basic lung function test, without broncho dilatation (micro-spirometer).All lung function related outcomes are performed during the same test. FEF: Forced expiratory flow
Time frame: 5 minutes
Socio-demographic status
Socio-demographic data, assessed by a home made questionnaire
Time frame: around 10 minutes
Health status
Health status (symptomatology) data, assessed by a home made questionnaire
Time frame: around 10 minutes
Indoor air exposure time
Indoor air exposure (time spent indoor within housing types, with associated air characteristics) data, assessed by a home made questionnaire
Time frame: around 10 minutes
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