Evaluating the Relationship Between Environmental Risk Factors in Housing Types and Chronic Respiratory Diseases in Ho Chi Minh City

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT02898129

Enrollment

1500

Registered

2016-09-13

Start date

2016-09-30

Completion date

2017-07-31

Last updated

2017-08-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic Respiratory Diseases

Keywords

chronic respiratory diseases, housing, lung function test

Brief summary

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

Interventions

OTHERQuestionnaire

DEVICELung function test

Basic lung function test performed with a micro-spirometer, without broncho dilatator

Study design

Allocation

NON_RANDOMIZED

Intervention model

PARALLEL

Primary purpose

SCREENING

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

10 Years to 65 Years

Healthy volunteers

Yes

Inclusion criteria

* Everybody

Exclusion criteria

* Not able to answer the questionnaire or give informed consent * Have a contra-indication for lung function test (acute myocardial infarction less that 1 month ago, pain related to spirometry, dementia/confused)

Design outcomes

Primary

Measure	Time frame	Description
FEV1/FVC	5 minutes	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.
FVC	5 minutes	Basic lung function test, without broncho dilatation (micro-spirometer). All lung function related outcomes are performed during the same test.FVC: Forced vital capacity.
VC	5 minutes	Basic lung function test, without broncho dilatation (micro-spirometer). All lung function related outcomes performed during the same test. VC: Vital capacity
FEF 25-75%	5 minutes	Basic lung function test, without broncho dilatation (micro-spirometer).All lung function related outcomes are performed during the same test. FEF: Forced expiratory flow
Socio-demographic status	around 10 minutes	Socio-demographic data, assessed by a home made questionnaire
Health status	around 10 minutes	Health status (symptomatology) data, assessed by a home made questionnaire
Indoor air exposure time	around 10 minutes	Indoor air exposure (time spent indoor within housing types, with associated air characteristics) data, assessed by a home made questionnaire

Countries

Vietnam

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026