Page 57 - Development of Questionnaires for Quantitative Medical Research

However, these procedures (i.e

administering a structured interview or using a

complicated device) are often time-consuming and

costly especially when many subjects are

suspected to have depression or OSA, and it is

necessary to perform a diagnosis for each subject.

Therefore, questionnaires are specifically

developed by scholars to help screen subjects for

conditions such as depression and OSA (Netzer et

al., 1999; Chung et al., 2008). This will save time,

manpower and cost since only those study subjects

that potentially have a higher risk which will be

detected by the screening questionnaires will then