2.2. Data Collection. The Institutional Review Board (IRB)
of our university waived the need for an official approval
due to the observational nature of our study. A face to face
interview was completed by three independent investigators
trained in a standardized manner filling out an anonymous
questionnaire. Charting was performed for the sake of
data completion. Participant’s anonymity and confidentiality
were respected. Variables included a spectrum of sociodemographic characteristics such as age, gender, urban or
rural residence, marital status (single, married, divorced, or
widowed), education (illiteracy or primary, complementary,
secondary, and university levels), and income-per-familymember (IPFM). IPFM, a measure defined as the household
monthly income of a family divided by number of its in the concentration of air pollutants for many days [6].