Reporting Bias of Dampness Problems and Smoking—A Result of Study Design  

作　　者：Malin Knutz Linda Hagerhed Engman Thorbjorn Gustavsson Laura von Kobyletzki Carl-Gustaf Bornehag 

机构地区：[1]Department of Health Science,Karlstad University,Karlstad,Sweden [2]Department of Building Physics and Indoor Environment,SP Technical Research Institute of Sweden,Boras,Sweden [3]Institute of Clinical Research Lund University,Lund,Sweden

出　　处：《Open Journal of Preventive Medicine》2014年第3期107-115,共9页预防医学期刊（英文）

摘　　要：Using questionnaire is a common, efficient and cheap way to collect data in population-based epidemiological studies. However, there is a general trend of declining response rates leading to a higher risk for bias affecting the validity of results. Use of anonymous questionnaires and/or other ways of distributions, e.g. via schools instead of postal, may increase response rates, but can also lead to other types of systematic errors. This study indicates that results from cross-sectional questionnaire studies differ depending on distribution method and whether the survey is anonymous or not. Also the official purpose of the survey may affect the outcome. When studying well-known risk-factors and health effects, potential methodological problems like reporting bias must be considered in cross sectional studies.Using questionnaire is a common, efficient and cheap way to collect data in population-based epidemiological studies. However, there is a general trend of declining response rates leading to a higher risk for bias affecting the validity of results. Use of anonymous questionnaires and/or other ways of distributions, e.g. via schools instead of postal, may increase response rates, but can also lead to other types of systematic errors. This study indicates that results from cross-sectional questionnaire studies differ depending on distribution method and whether the survey is anonymous or not. Also the official purpose of the survey may affect the outcome. When studying well-known risk-factors and health effects, potential methodological problems like reporting bias must be considered in cross sectional studies.

关 键 词：QUESTIONNAIRE ASTHMA Longitudinal Study Home Environment Children DAMPNESS SMOKING BIAS 

分 类 号：R73[医药卫生—肿瘤]